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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Brochure F06
Creator: Bastyzyk, Marta B., Hernandez, Jose, Kim, Tae Young, Lerash, Kevin, Lybolt, Crystal, Seatton, Brandon, Skontos, George, Sopko, Tyge, Vaks, Nir, Agan, Amber, Boone, Elizabeth, Buente, Adam, Coleman, Jessica, Gerding, Eric, Glass, Andrew, Goyak, Matt, Holt, Nicole, Mullendore, Jessica, Perchlik, Emily, Ripley, Paul
Date: 2006-12, 2006-12
Description: IPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based...
Show moreIPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based products, mainly building materials, and detail the possible obstacles in integration of this technology into design, public policy issues and general public engagement
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Fall 2006 semester
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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Project Plan F06
Creator: Bastyzyk, Marta B., Hernandez, Jose, Kim, Tae Young, Lerash, Kevin, Lybolt, Crystal, Seatton, Brandon, Skontos, George, Sopko, Tyge, Vaks, Nir, Agan, Amber, Boone, Elizabeth, Buente, Adam, Coleman, Jessica, Gerding, Eric, Glass, Andrew, Goyak, Matt, Holt, Nicole, Mullendore, Jessica, Perchlik, Emily, Ripley, Paul
Date: 2006-12, 2006-12
Description: IPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based...
Show moreIPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based products, mainly building materials, and detail the possible obstacles in integration of this technology into design, public policy issues and general public engagement
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Fall 2006 semester
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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Final Report Sp06
Creator: Ayodele, Ayo, Dass, Saurabh, Desai, Ankit, Frumkin, Jason, Komyathy, Jonathan, Lerush, Kevin, Novak, Jason, Peterson, Margaret, Robinson, Bezaleel, Shah, Sagar, Skontos, George, Stohl, Michael, Wilk, Andrew, Yang, Sungwoo
Date: 2006-05, 2006-05
Description: The first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a...
Show moreThe first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a basic understanding of the workings behind nanotechnology and determine applications which may interest our target audience (see second objective). The second objective of IPRO 341 is to determine a target audience. Since this semester’s team will focus on public assessment and education, a target audience must be chosen to present our research findings to. The third objective of IPRO 341 is to assess the current level of knowledge which the target audience has pertaining to nanotechnology. By determining what the audience already knows about the subject the team can organize and present the necessary information. The fourth objective of IPRO 341 is to educate our target audience. Public education of nanotechnology and its applications is the mission of this IPRO team. All previous objectives are part of this encompassing goal of public education. The team will work on putting together a tool for public education which can be used by the target audience to gain knowledge on the subject of nanotechnology. The team also plans to spread interest of the tool so that it may be used to educate the public.
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Spring 2006 semester
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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 IPRO Day Presentation Sp06
Creator: Ayodele, Ayo, Dass, Saurabh, Desai, Ankit, Frumkin, Jason, Komyathy, Jonathan, Lerush, Kevin, Novak, Jason, Peterson, Margaret, Robinson, Bezaleel, Shah, Sagar, Skontos, George, Stohl, Michael, Wilk, Andrew, Yang, Sungwoo
Date: 2006-05, 2006-05
Description: The first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a...
Show moreThe first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a basic understanding of the workings behind nanotechnology and determine applications which may interest our target audience (see second objective). The second objective of IPRO 341 is to determine a target audience. Since this semester’s team will focus on public assessment and education, a target audience must be chosen to present our research findings to. The third objective of IPRO 341 is to assess the current level of knowledge which the target audience has pertaining to nanotechnology. By determining what the audience already knows about the subject the team can organize and present the necessary information. The fourth objective of IPRO 341 is to educate our target audience. Public education of nanotechnology and its applications is the mission of this IPRO team. All previous objectives are part of this encompassing goal of public education. The team will work on putting together a tool for public education which can be used by the target audience to gain knowledge on the subject of nanotechnology. The team also plans to spread interest of the tool so that it may be used to educate the public.
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Spring 2006 semester
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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 IPRO Day Presentation F06
Creator: Bastyzyk, Marta B., Hernandez, Jose, Kim, Tae Young, Lerash, Kevin, Lybolt, Crystal, Seatton, Brandon, Skontos, George, Sopko, Tyge, Vaks, Nir, Agan, Amber, Boone, Elizabeth, Buente, Adam, Coleman, Jessica, Gerding, Eric, Glass, Andrew, Goyak, Matt, Holt, Nicole, Mullendore, Jessica, Perchlik, Emily, Ripley, Paul
Date: 2006-12, 2006-12
Description: IPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based...
Show moreIPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based products, mainly building materials, and detail the possible obstacles in integration of this technology into design, public policy issues and general public engagement
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Fall 2006 semester
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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Brochure Sp06
Creator: Ayodele, Ayo, Dass, Saurabh, Desai, Ankit, Frumkin, Jason, Komyathy, Jonathan, Lerush, Kevin, Novak, Jason, Peterson, Margaret, Robinson, Bezaleel, Shah, Sagar, Skontos, George, Stohl, Michael, Wilk, Andrew, Yang, Sungwoo
Date: 2006-05, 2006-05
Description: The first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a...
Show moreThe first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a basic understanding of the workings behind nanotechnology and determine applications which may interest our target audience (see second objective). The second objective of IPRO 341 is to determine a target audience. Since this semester’s team will focus on public assessment and education, a target audience must be chosen to present our research findings to. The third objective of IPRO 341 is to assess the current level of knowledge which the target audience has pertaining to nanotechnology. By determining what the audience already knows about the subject the team can organize and present the necessary information. The fourth objective of IPRO 341 is to educate our target audience. Public education of nanotechnology and its applications is the mission of this IPRO team. All previous objectives are part of this encompassing goal of public education. The team will work on putting together a tool for public education which can be used by the target audience to gain knowledge on the subject of nanotechnology. The team also plans to spread interest of the tool so that it may be used to educate the public.
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Spring 2006 semester
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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Midterm Report F06
Creator: Bastyzyk, Marta B., Hernandez, Jose, Kim, Tae Young, Lerash, Kevin, Lybolt, Crystal, Seatton, Brandon, Skontos, George, Sopko, Tyge, Vaks, Nir, Agan, Amber, Boone, Elizabeth, Buente, Adam, Coleman, Jessica, Gerding, Eric, Glass, Andrew, Goyak, Matt, Holt, Nicole, Mullendore, Jessica, Perchlik, Emily, Ripley, Paul
Date: 2006-12, 2006-12
Description: IPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based...
Show moreIPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based products, mainly building materials, and detail the possible obstacles in integration of this technology into design, public policy issues and general public engagement
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Fall 2006 semester
Show less

Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Final Report F06
Creator: Bastyzyk, Marta B., Hernandez, Jose, Kim, Tae Young, Lerash, Kevin, Lybolt, Crystal, Seatton, Brandon, Skontos, George, Sopko, Tyge, Vaks, Nir, Agan, Amber, Boone, Elizabeth, Buente, Adam, Coleman, Jessica, Gerding, Eric, Glass, Andrew, Goyak, Matt, Holt, Nicole, Mullendore, Jessica, Perchlik, Emily, Ripley, Paul
Date: 2006-12, 2006-12
Description: IPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based...
Show moreIPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based products, mainly building materials, and detail the possible obstacles in integration of this technology into design, public policy issues and general public engagement
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Fall 2006 semester
Show less

Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Project Plan Sp06
Creator: Ayodele, Ayo, Dass, Saurabh, Desai, Ankit, Frumkin, Jason, Komyathy, Jonathan, Lerush, Kevin, Novak, Jason, Peterson, Margaret, Robinson, Bezaleel, Shah, Sagar, Skontos, George, Stohl, Michael, Wilk, Andrew, Yang, Sungwoo
Date: 2006-05, 2006-05
Description: The first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a...
Show moreThe first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a basic understanding of the workings behind nanotechnology and determine applications which may interest our target audience (see second objective). The second objective of IPRO 341 is to determine a target audience. Since this semester’s team will focus on public assessment and education, a target audience must be chosen to present our research findings to. The third objective of IPRO 341 is to assess the current level of knowledge which the target audience has pertaining to nanotechnology. By determining what the audience already knows about the subject the team can organize and present the necessary information. The fourth objective of IPRO 341 is to educate our target audience. Public education of nanotechnology and its applications is the mission of this IPRO team. All previous objectives are part of this encompassing goal of public education. The team will work on putting together a tool for public education which can be used by the target audience to gain knowledge on the subject of nanotechnology. The team also plans to spread interest of the tool so that it may be used to educate the public.
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Spring 2006 semester
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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Midterm Report Sp06
Creator: Ayodele, Ayo, Dass, Saurabh, Desai, Ankit, Frumkin, Jason, Komyathy, Jonathan, Lerush, Kevin, Novak, Jason, Peterson, Margaret, Robinson, Bezaleel, Shah, Sagar, Skontos, George, Stohl, Michael, Wilk, Andrew, Yang, Sungwoo
Date: 2006-05, 2006-05
Description: The first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a...
Show moreThe first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a basic understanding of the workings behind nanotechnology and determine applications which may interest our target audience (see second objective). The second objective of IPRO 341 is to determine a target audience. Since this semester’s team will focus on public assessment and education, a target audience must be chosen to present our research findings to. The third objective of IPRO 341 is to assess the current level of knowledge which the target audience has pertaining to nanotechnology. By determining what the audience already knows about the subject the team can organize and present the necessary information. The fourth objective of IPRO 341 is to educate our target audience. Public education of nanotechnology and its applications is the mission of this IPRO team. All previous objectives are part of this encompassing goal of public education. The team will work on putting together a tool for public education which can be used by the target audience to gain knowledge on the subject of nanotechnology. The team also plans to spread interest of the tool so that it may be used to educate the public.
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Spring 2006 semester
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Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341
Creator: Bastyzyk, Marta B., Hernandez, Jose, Kim, Tae Young, Lerash, Kevin, Lybolt, Crystal, Seatton, Brandon, Skontos, George, Sopko, Tyge, Vaks, Nir, Agan, Amber, Boone, Elizabeth, Buente, Adam, Coleman, Jessica, Gerding, Eric, Glass, Andrew, Goyak, Matt, Holt, Nicole, Mullendore, Jessica, Perchlik, Emily, Ripley, Paul
Date: 2006-12, 2006-12
Description: IPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based...
Show moreIPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based products, mainly building materials, and detail the possible obstacles in integration of this technology into design, public policy issues and general public engagement
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Fall 2006 semester
Show less

Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Poster F06
Creator: Bastyzyk, Marta B., Hernandez, Jose, Kim, Tae Young, Lerash, Kevin, Lybolt, Crystal, Seatton, Brandon, Skontos, George, Sopko, Tyge, Vaks, Nir, Agan, Amber, Boone, Elizabeth, Buente, Adam, Coleman, Jessica, Gerding, Eric, Glass, Andrew, Goyak, Matt, Holt, Nicole, Mullendore, Jessica, Perchlik, Emily, Ripley, Paul
Date: 2006-12, 2006-12
Description: IPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based...
Show moreIPRO 341’s objective is to extensively research and evaluate the societal, economical and environmental implications of nanotechnology-based products, mainly building materials, and detail the possible obstacles in integration of this technology into design, public policy issues and general public engagement
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Fall 2006 semester
Show less

Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341
Creator: Ayodele, Ayo, Dass, Saurabh, Desai, Ankit, Frumkin, Jason, Komyathy, Jonathan, Lerush, Kevin, Novak, Jason, Peterson, Margaret, Robinson, Bezaleel, Shah, Sagar, Skontos, George, Stohl, Michael, Wilk, Andrew, Yang, Sungwoo
Date: 2006-05, 2006-05
Description: The first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a...
Show moreThe first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a basic understanding of the workings behind nanotechnology and determine applications which may interest our target audience (see second objective). The second objective of IPRO 341 is to determine a target audience. Since this semester’s team will focus on public assessment and education, a target audience must be chosen to present our research findings to. The third objective of IPRO 341 is to assess the current level of knowledge which the target audience has pertaining to nanotechnology. By determining what the audience already knows about the subject the team can organize and present the necessary information. The fourth objective of IPRO 341 is to educate our target audience. Public education of nanotechnology and its applications is the mission of this IPRO team. All previous objectives are part of this encompassing goal of public education. The team will work on putting together a tool for public education which can be used by the target audience to gain knowledge on the subject of nanotechnology. The team also plans to spread interest of the tool so that it may be used to educate the public.
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Spring 2006 semester
Show less

Title: Insight: Anticipating the Future, Assessing the Impact (semester?), IPRO 341: Insight IPRO 341 Poster Sp06
Creator: Ayodele, Ayo, Dass, Saurabh, Desai, Ankit, Frumkin, Jason, Komyathy, Jonathan, Lerush, Kevin, Novak, Jason, Peterson, Margaret, Robinson, Bezaleel, Shah, Sagar, Skontos, George, Stohl, Michael, Wilk, Andrew, Yang, Sungwoo
Date: 2006-05, 2006-05
Description: The first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a...
Show moreThe first objective of IPRO 341 is to research four areas in which nanotechnology is being applied. Through this research the team will gain a basic understanding of the workings behind nanotechnology and determine applications which may interest our target audience (see second objective). The second objective of IPRO 341 is to determine a target audience. Since this semester’s team will focus on public assessment and education, a target audience must be chosen to present our research findings to. The third objective of IPRO 341 is to assess the current level of knowledge which the target audience has pertaining to nanotechnology. By determining what the audience already knows about the subject the team can organize and present the necessary information. The fourth objective of IPRO 341 is to educate our target audience. Public education of nanotechnology and its applications is the mission of this IPRO team. All previous objectives are part of this encompassing goal of public education. The team will work on putting together a tool for public education which can be used by the target audience to gain knowledge on the subject of nanotechnology. The team also plans to spread interest of the tool so that it may be used to educate the public.
Deliverables for IPRO 341: Insight: Anticipating the Future, Assessing the Impact for the Spring 2006 semester
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Title: INCORPORATION OF INORGANIC AND ORGANIC ADDITIVES INTO MODEL PACKAGING POLYMERS
Creator: Bajaj, Akhil
Date: 2016, 2016-12
Description: Nowadays, various commercial polymers such as low density poly(ethylene) (LDPE), poly(propylene) (PP), and Nylon, may contain or are...
Show moreNowadays, various commercial polymers such as low density poly(ethylene) (LDPE), poly(propylene) (PP), and Nylon, may contain or are fabricated with molecular and/or nano-sized inorganic filler elements. These fillers elements often modify, enhance or bring desired changes to the native properties of these polymers. However, these additives also have the potential to interact with the physical environment. For any new additive, it is important to assess and evaluate the potential consumer exposure under intended conditions of use. This thesis reports on the preparation of model polymer samples fabricated with various molecular and nano-sized filler elements (exfoliated clays, quantum dots, and organic colorants) to help evaluate factors affecting the rate of migration and the potential consumer exposure associated with these materials. One of the main aims of this project is the development of methods to incorporate organic and inorganic additives into polymers relevant to food packaging and medical devices using a laboratory scale twin-screw micro-compounder. Some of the samples prepared via optimized methods include (1) 1, 3, 5, and 7 wt.% Montmorillonite in LDPE; (2) quantum dots (QDs) spanning a size range of 3-8 nm into LDPE; and (3) 1-2 wt.% colorant-loaded polymer films, where the colorants include phthalocyanine blue, phthalocyanine green, quinizarin blue, manganese (II) phthalocyanine and titanium (IV) oxide, and the host polymers include poly(propylene), poly(carbonate), Nylon 12, and PEBAX (poly(ether-block-amide)). In addition to optimizing methods for composite fabrication, the properties of these materials were analyzed using many techniques, including differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), inductively coupled plasma-atomic emission spectroscopy (ICP-AES), and Fourier transform-infrared (FT-IR) spectroscopy. Migration experiments were carried out to evaluate the interaction of samples with model food and environmental systems. This research was instrumental to support efforts to understand the mechanisms of potential exposure to polymer additives.
M.S. in Food Safety and Technology, December 2016
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Title: Superior Reversible Hydrogen Storage of the LiBH4 + MgH2 System Enabled by High-Energy Ball Milling with In-Situ Aerosol Spraying
Creator: Ding, Zhao
Date: 2019
Description: The prospect of LiBH4 + MgH2 mixture has been limited by its sluggish kinetics, despite its excellent hydrogen storage capacity theoretically....
Show moreThe prospect of LiBH4 + MgH2 mixture has been limited by its sluggish kinetics, despite its excellent hydrogen storage capacity theoretically. We have designed a novel process termed as high-energy ball milling of MgH2 at ambient temperature along with aerosol spraying of LiBH4 dissolved in tetrahydrofuran (THF) solution (BMAS) to improve the thermodynamic and kinetic performance of LiBH4 + MgH2 hydrogen storage materials. Through this BMAS process, we have demonstrated that, for the first time, the reaction between LiBH4 + MgH2 can take place near ambient temperature, and the in-situ formation of LiH and MgB2 during BMAS is achieved through a new reaction pathway in which nano-LiBH4 decomposes to Li2B12H12 first and the newly formed Li2B12H12 reacts with MgH2 to form LiH and MgB2.Using the newly designed automated BMAS apparatus, we have successfully produced a BMAS mixture containing 1 mole of MgH2 + 0.5 mole of LiBH4, i.e., with 25% LiBH4 in the mixture for the stoichiometric reaction. The BMAS powder with 25% LiBH4 can release and absorb ~5.7 wt.% H2 at 265 oC, which is the highest one ever reported for the LiBH4 + MgH2 system at temperature ≤ 265 oC. It is found that the unusually high reversible hydrogen storage is accomplished through two parallel reaction pathways. One is nano-LiBH4 decomposes to form Li2B12H12 and H2 first and then Li2B12H12 reacts with MgH2 to form MgB2, LiH and H2. The other is nano-MgH2 decomposes to form Mg and H2 first and then Mg reacts with LiBH4 to form MgB2, LiH and H2. These reaction pathways become possible because of the presence of nano-LiBH4 and nano-MgH2 and their intimate mixing, enabled by the BMAS process. We have also revealed that the solid-state dehydrogenation kinetics of the BMAS powder with 25% LiBH4 at 265 oC is nucleation-and-growth controlled. The rate-limiting step for dehydrogenation via the two parallel reaction pathways has been identified through examination of the elementary reactions as the nucleation and growth of reaction products LiH and MgB2. Given the significantly improved hydrogen storage capacity for the LiBH4 + MgH2 system obtained via BMAS, investigation on increasing the LiBH4 content in the BMAS powder from 25% to 50% is performed. It is shown that Mg(BH4)2 can be produced during the BMAS process and it contributes to H2 release at temperature ≤ 265 oC. Three parallel H2 release mechanisms have been identified from the BMAS powder. These include (i) nano-LiBH4 decomposes to form Li2B12H12 and H2 first and then Li2B12H12 reacts with MgH2 to form MgB2, LiH and H2, (ii) nano-Mg(BH4)2 decomposes to form MgH2, B and H2, and (iii) nano-MgH2 decomposes to Mg and H2. Together these three mechanisms result in 4.11 wt.% H2 release in the solid state at temperature ≤ 265 oC. Furthermore, the predicted property of Fe3B in absorbing more H2 than releasing it is confirmed experimentally for the first time in this study. Varied models have been identified to describe the kinetic of solid-state dehydrogenation of the BMAS powder with 50% LiBH4 at 265 oC with increasing cycles. Additionally, the geometries of the solid particles involving with the dehydrogenation have also been estimated.
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Title: DOPING OF SODIUM CHROMIUM OXIDE CATHODE MATERIALS TO ENHANCE ELECTROCHEMICAL PERFORMANCE FOR SODIUM-ION BATTERIES
Creator: wang, ziyong
Date: 2019
Description: In this project, we investigated the effects of doping several types of metals to NaCrO2 on its electrochemical performance. The doping method...
Show moreIn this project, we investigated the effects of doping several types of metals to NaCrO2 on its electrochemical performance. The doping method is aiming to stabilize the O3-type structure by partial substituting some of Cr with other metals during intercalation/deintercalation by suppressing Cr6+ migration to alkaline slab, and thus facilitate long-term cycle performance and reversible capacity. All doped NaCrO2 powders were hereby denoted to NaMe0.1Cr0.9O2 (Me=Al, Co, Ni, Mn). To achieve metal-doped NaCrO2 powders, sodium, chromium and dopant sources were mixed with various metal oxides and then subjected to 6-hour high energy ball milling, followed by heating in flow-Ar tube at 900℃ for 1 hour. Pristine NaCrO2 powder synthesized in the same process was to make comparisons with doped ones. To understand the mechanism of doping, field emission scanning microscopy (FESM) and energy Disperse Spectroscopy (EDS), as well as X-ray diffractometer (XRD), were employed to analyze the morphology and composition of final products. Benefiting from Ni doping, NaNi0.1Cr0.9O2 cell exhibited a high reversible capacity of 132 mAh g-1 at the initial cycle in a potential region between 2.0 and 3.6 V vs. Na/Na+, and 78 % of capacity retention over 70 cycles. For NaMn0.1Cr0.9O2, reversible capacity at first discharge is about 30 mAh g-1, lower than that of Ni-doped and pristine NaCrO2, while the cycle retention stays at nearly 100% after 100 cycles. The opposite charge/discharge behaviors from Ni- and Mn-doped NaCrO2 provide us a potential method for the optimization of cathode materials with the best electrochemical performance in the future.
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Title: Characterization and Migration of Silver Nanoparticles from Electron-Beam Irradiated Low-Density Polyethylene
Creator: Donovan, Dylan
Date: 2023
Description: Polymer nanocomposites (PNCs) and engineered nanomaterials (ENMs) may find use in a wide range of commercial applications, including food and...
Show morePolymer nanocomposites (PNCs) and engineered nanomaterials (ENMs) may find use in a wide range of commercial applications, including food and medical product packaging. Migration of nanofillers from polymer nanocomposites into food matrices could be a source of human dietary exposure to ENMs. Electron beam (e-beam) irradiation is a processing method used for microbial inactivation as well as for modifying properties of polymer films, such as stretch resistance and shrink tension. Process treatment of nanotechnology-based packaging materials either for sterilization or for strengthening of the polymer films may have a significant effect on the migration of ENMs into food matrices. The primary objective of this study is to investigate the effect of e-beam irradiation treatments of LDPE containing silver nanoparticles (AgNPs) and the subsequent migration of AgNPs into a food simulant under intended use conditions. The study observes a correlation between e-beam irradiation dose quantity and the release of AgNPs into a food simulant.
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Title: Polarization Induced by A Terahertz Electric Field in A Semiconductor Nanodimer in the Overlapping Regime
Creator: Wang, Zi
Date: 2023
Description: Boltzmann transport equation is a theoretical framework for the description of thermodynamics or charge reactions in a system not in...
Show moreBoltzmann transport equation is a theoretical framework for the description of thermodynamics or charge reactions in a system not in equilibrium, which can be applied to the analysis of the interactions of mobile charges with an electromagnetic wave. When the dimensions of the object are small compared to the wavelength, the induced dipole moment provides a means to characterize the collective response while providing insight to the nature of the charge-field interactions. Semiconductor nanoparticles exhibit surface plasmon resonance in the terahertz frequency range and are of current interest for the development of components and circuits in that part of the electromagnetic spectrum. By changing the plasmon frequencies of doped semiconductors through the change of carrier concentration, new opportunities arise for plasmonic manipulation in terahertz region leading to various promising applications. Despite the Drude model's long-term success and convenience in describing the electrical conductivity of metals in terms of dielectric functions, some aspects of polarization are not accounted for by bulk properties. By incorporating the transport equations of the charge carriers with Maxwell's equations, screening effects of charge carriers can be accounted for, enabling the internal field, space charge and induced dipole moment of a semiconductor nanoparticle to be studied.The computations performed for elementary dimer structures in overlapping cases revealed the internal field screening, while the complex dipole moments show dispersion and absorption effects. The numerical algorithms are implemented using the finite element method to investigate the surface plasmon resonance (SPR) induced on the semiconductor particles. Unique SPR modes evolution is observed as the thickness of the overlap region is varied. The characteristics can be interpreted by the migration of local space charge as the level of overlap is varied. This degree of freedom provided by a semiconductor nanodimer could be employed to control the local field near a simple cluster of nanoparticles, with potential for application in sensing and circuit components in the terahertz frequency range.
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