| 项目编号: | 1454095
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| 项目名称: | CAREER: In- and Out-of-Equilibrium Behavior of Colloidal Clusters with Broken Symmetries |
| 作者: | Ning Wu
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| 承担单位: | Colorado School of Mines
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| 批准年: | 2014
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| 开始日期: | 2015-05-01
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| 结束日期: | 2020-04-30
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| 资助金额: | USD548413
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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: | cluster
; colloidal cluster
; project
; colloidal science
; material
; broken-symmetry
; colloidal particle
; microfluidic device
; well-controlled broken symmetry
; colloidal dispersion
; soft materials
; out-of-equilibrium behavior
; addressable symmetry
|
| 英文摘要: | Colloidal dispersions play an important role in materials processing for industries ranging from electronics to pharmaceuticals. When colloidal particles are organized into arrays and other structures, the resulting materials can exhibit optical and electrical properties that are not found in natural materials. Therefore, colloids serve as building blocks for fabricating advanced functional materials. This project will develop new approaches to make clusters of colloidal particles with well-controlled compositions and geometries, which will expand the range of materials that can be fabricated. The project will investigate how external fields can be used to manipulate the assembly of particles into clusters and ultimately into large ensembles. Results from the project will provide fundamental knowledge that scientists and engineers can use to develop materials and devices, such as new sensors or new coatings with controlled optical properties. In addition, the project team will develop a summer research program in colloidal science targeted to high school students in the Denver area and especially to students from underrepresented groups. A multi-disciplinary course titled "Engineering of Soft Materials" will be developed to engage undergraduate students in colloidal science and train them for careers in the materials industry.
New approaches will be developed to make clusters of colloids with well-controlled broken symmetries. A microfluidic device that integrates both electric (for assembly) and optical fields (for structural cross-linking) will be used to fabricate monodisperse higher order colloidal clusters with addressable compositions and geometries. The asymmetric properties of colloidal clusters will be systematically studied within the context of particle propulsion, which constitutes a significant step toward understanding the transport properties of active colloids. A virtually patterned electrode will be used to generate micro-gradients in electric field and direct particles into periodic structures with addressable symmetry at both cluster and lattice levels. The coupled optical effects between neighboring clusters and the feasibility for making functional coatings will also be explored. The overall goal of the project is to understand how the broken-symmetry in colloidal clusters affects their in- and out-of-equilibrium behavior from the level of an individual particle to a large ensemble. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94689
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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: | |
Ning Wu. CAREER: In- and Out-of-Equilibrium Behavior of Colloidal Clusters with Broken Symmetries. 2014-01-01.
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