| 项目编号: | 1402166
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| 项目名称: | Collaborative Research: Exploiting Void Symmetries to Control the Self-Assembly of Nanoparticles |
| 作者: | Athanassios Panagiotopoulos
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| 承担单位: | Princeton University
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| 批准年: | 2013
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| 开始日期: | 2014-09-01
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| 结束日期: | 2018-08-31
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| 资助金额: | USD230000
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| 资助来源: | US-NSF
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| 项目类别: | Standard Grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Engineering - Chemical, Bioengineering, Environmental, and Transport Systems
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| 英文关键词: | void
; polymer
; self-assembly
; void symmetry
; colloidal crystal
; collaborative research
; pi
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| 英文摘要: | PI: Kumar, Sanat / Panagiotopoulos, Athanassios
Proposal Number: 1403049 / 1402166
Institution: Columbia University / Princeton University
Title: Collaborative Research: Exploiting Void Symmetries to Control the Self-Assembly of Nanoparticles
The assembly of nanoparticles (NPs) into colloidal crystals is a promising way to obtain ordered nanocomposite materials with unique properties determined by the choice of the constituent NPs. If successful, this novel approach will have a significant impact on the ability of experimentalists to rationally design ordered colloidal crystals for a wide range of optical and catalytic applications, such as photonic crystals, optical switches and filters, and catalytic devices. The PIs have shown a novel way to selectively stabilize one crystal structure over another possible one by the use of polymers that can intercalate between the NPS.
The PIs have made an interesting discovery that, even when the energy, pressure, and packing fraction for two crystal isomorphs, e.g., HCP and FCC, are the same, the distribution of voids within the crystals are different. By filling the voids with polymers of different length, they were able to show that one can selectively stabilize HCP over FCC crystals. Based on these findings, they propose to make use of this novel insight about void symmetries and size-distributions to select a desired polymorph from a suite of competing crystal structure. In this proposal, they will use molecular dynamics (using Graphics Processing Unit (GPU)-based molecular dynamics simulations) and Monte-Carlo methods to study the colloidal crystals in colloid/polymer blends, . They will explore several structures of spherically symmetric and patchy particles with polymers of varying conformation and flexibility in order to understand how to maximize the polymers' entropy in voids of different geometries, and how the introduction of enthalpic interactions may act in counterbalance to the polymer entropy. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/95662
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Athanassios Panagiotopoulos. Collaborative Research: Exploiting Void Symmetries to Control the Self-Assembly of Nanoparticles. 2013-01-01.
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