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Achieving Molecular Level Control Over the Chemical, Electrochemical, and Electrical Properties of Crystalline Si Surfaces

Achieving Molecular Level Control Over the Chemical, Electrochemical, and Electrical Properties of Crystalline Si Surfaces
实现对晶体硅表面化学、电化学和电学性质的分子水平控制
批准号:
1808599
负责人:
Nathan Lewis
金额:
$54.0万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2018
资助国家:
美国
项目状态:
已结题
起止时间:
2018-08-01 至 2023-07-31

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中文摘要
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英文摘要
Professor Nathan S. Lewis of California Institute of Technology is supported by the Macromolecular, Supramolecular, and Nanochemistry (MSN) Program of the Division of Chemistry to study the changes in the reactivity of technologically important semiconductor surfaces that accompany the transition from small molecules to nanocrystals and two-dimensional materials, as well as from nanocrystals and two-dimensional materials to bulk crystalline solids. The aim is to gain fundamental insight into the transition in behavior from materials comprised of individual bonds to materials formed by extended one-, two-, and ultimately three-dimensional bonding. The project promotes the progress of science by developing novel reaction pathways that exploit the size-dependent changes in surface reactivity. Si surfaces, small-molecule models of Si surfaces, and Si nanocrystals are selected as a critical example to provide insight into the chemical continuum from the nanoscale to the macroscale. The novel reaction pathways being developed may enable a new generation of solar cells, new interfaces for sensors and electronic devices and new approaches to other related Si device constructs. Graduate and undergraduate students from diverse backgrounds are involved in the project. In addition, the research results are incorporated into Freshmen chemistry course material, integrated in outreach program towards high schools, such as Juice from Juice and Project SEAL hands-on science modules, and communicated to non-professional audiences at all levels and through multiple media outlets. In this project, new classes of reactions that are enabled by changes in the electronic structure of semiconductors that result from changes in the size and dimensionality of the material are explored. The project is focused on determining: 1) which classes of reactions are influenced by the underlying electronic structure of the solid, 2) whether such reactions can be used to systematically achieve beneficial electronic coupling between nanoparticles, and, 3) whether such reactions can be used to covalently link three-dimensional materials, such as bulk crystals, to two-dimensional materials while also providing control over the electronic coupling of the structurally dissimilar materials. The scope of the project includes reactions on Si surfaces, small-molecule models of Si surfaces, and Si nanocrystals. The project also includes reactions on two-dimensional materials such as graphene, hexagonal boron nitride, and transition-metal chalcogenides anchored to Si surfaces. This project is also developing methods to covalently functionalize two-dimensional materials, such as graphene, to allow robust electronic connections and strong interactions between layers and in heterojunction stacks. Functionalized two-dimensional materials are being attached to linkers covalently bonded to the Si surface, and more layers are being added to the stack using sequential addition of layers and linkers until the behavior approximates that of the bulk material on Si, as determined by XPS and optical characterization methods. This work is developing an understanding of the point at which stacks of two-dimensional materials begin to behave in the same was as bulk materials.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.
期刊论文(2)
专著(0)
科研奖励(0)
会议论文
Surface Passivation and Positive Band-Edge Shift of p-Si(111) Surfaces Functionalized with Mixed Methyl/Trifluoromethylphenylacetylene Overlayers
用混合甲基/三氟甲基苯乙炔覆盖层功能化的 p-Si(111) 表面的表面钝化和正带边位移
DOI: 10.1021/acs.jpcc.0c02017
发表时间: 2020
期刊: The Journal of Physical Chemistry C
影响因子: --
作者: [Cabán-Acevedo, Miguel, Papadantonakis, Kimberly M., Brunschwig, Bruce S., Lewis, Nathan S.]
通讯作者: Lewis, Nathan S.
DOI: 10.1021/acs.jpclett.9b01487
发表时间: 2019-09-19
期刊: JOURNAL OF PHYSICAL CHEMISTRY LETTERS
影响因子: 5.7
作者: [Bhattacharyya, Dhritiman, Montenegro, Angelo, Benderskii, Alexander, V]
通讯作者: Benderskii, Alexander, V
Elucidating essential factors for production of recombinant secreted proteins through proteomics
  • 批准号:
    2030039
  • 项目类别:
    Standard Grant
  • 资助金额:
    $67.0万
  • 财政年份:
    2021
  • 负责人:
    Nathan Lewis
  • 依托单位:
Chemical Mechanisms of Inorganic Phototropic Growth
  • 批准号:
    1905963
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $54.0万
  • 财政年份:
    2019
  • 负责人:
    Nathan Lewis
  • 依托单位:
Achieving Molecular Level Control over the Chemical, Electrochemical, and Electrical Properties of Crystalline Si Surfaces
  • 批准号:
    1214152
  • 项目类别:
    Standard Grant
  • 资助金额:
    $55.5万
  • 财政年份:
    2012
  • 负责人:
    Nathan Lewis
  • 依托单位:
Achieving Molecular Level Control over the Chemical, Electrochemical, and Electrical Properties of Crystalline Si Surfaces
  • 批准号:
    0911682
  • 项目类别:
    Standard Grant
  • 资助金额:
    $59.5万
  • 财政年份:
    2009
  • 负责人:
    Nathan Lewis
  • 依托单位:
国内基金
海外基金
Kidney injury molecular(KIM-1)介导肾小管上皮细胞自噬在糖尿病肾病肾间质纤维化中的作用
  • 批准号:
    81300605
  • 项目类别:
    青年科学基金项目
  • 资助金额:
    23.0万元
  • 批准年份:
    2013
  • 负责人:
    唐琳
  • 依托单位:
Molecular Plant
Molecular Interaction Reconstruction of Rheumatoid Arthritis Therapies Using Clinical Data
Molecular Plant