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Molecular Control over the Mechanism of Crystal Growth

Molecular Control over the Mechanism of Crystal Growth
晶体生长机制的分子控制
批准号:
1709370
负责人:
James Martin
金额:
$40.0万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
2017
资助国家:
美国
项目状态:
已结题
起止时间:
2017-07-01 至 2021-06-30

项目摘要

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中文摘要
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Non-technical Abstract:Control of crystalline structure is important to the application of materials, whether to control the activity of pharmaceuticals or the electronic conductivity of advanced materials. However, deciphering the physical/chemical processes that determine growth of specific crystal structures is complex. This project systematically measures the influence of molecular shape and the strength of intermolecular interactions on the kinetics of crystal growth to investigate molecular level control of the mechanism of melt crystallization. In addition to advancing the fundamental science, this work is invaluable to all fields of science for which crystal growth is critical, such as polymers, pharmaceuticals, food products, geology, and atmospheric science. In addition, professional development for high school chemistry teachers is made available across the state of North Carolina. This discipline based professional development helps teachers shift curricula from a standardized test-based content/algorithm focus to critical-thinking/problem-solving based teaching and learning.Technical Abstract:The research supported by this award uniquely presents a melt crystallization strategy that directly probes the influence of intrinsic factors of molecular shape and intermolecular forces on the mechanism of crystal growth. Experimental measurement of the crystallization kinetics of oligoacenes and alkylammonium metal halide salts, as a function of the number of aromatic rings and length of alkyl chains, respectively, is being used to probe the impact of molecular anisotropy and crystal dimensionality on the rate of crystallization. Comparative kinetic measurements from isotropic vs. oriented melts of liquid crystals is utilized to articulate the impact of molecular pre-orientation on the rate of crystallization. Also, the crystallization kinetics across the family of substituted benzenes creates a geometric and energetic matrix with which to evaluate functional group effects. The PI's recent discovery of Transition Zone Theory, the condensed matter analog of Eyring's transition state theory, enables for the identification of entropic and enthalpic activation parameters of crystallization reactions. This award facilitates a continuing offering of the summer teacher workshops, and also supports hiring a high school chemistry teacher to work with the PI during summers to write and publish components of this professional development, which affords greater dissemination of the problem-solving/discovery based materials.
期刊论文(6)
专著(0)
科研奖励(0)
会议论文
DOI: 10.1021/acs.jchemed.7b00878
发表时间: 2018
期刊: Journal of Chemical Education
影响因子: 3
作者: [Martin, James D., Nock, Katherine A.]
通讯作者: Nock, Katherine A.
Reply to “A Comparison of the Stochastic and Deterministic Approaches in a Nucleation–Growth Type Model of Nanoparticle Formation”
回复“成核过程中随机方法和确定性方法的比较”纳米粒子形成的生长类型模型
DOI: 10.1021/acs.chemmater.1c01690
发表时间: 2021
期刊: Chemistry of Materials
影响因子: 8.6
作者: [Martin, James D.]
通讯作者: Martin, James D.
DOI: 10.1107/s1600576719017060
发表时间: 2020-02
期刊: Journal of Applied Crystallography
影响因子: 6.1
作者: [James Weng;Eric D. Dill;James D. Martin;R. Whitfield;C. Hoffmann;F. Ye]
通讯作者: James Weng;Eric D. Dill;James D. Martin;R. Whitfield;C. Hoffmann;F. Ye
DOI: 10.1021/acs.jpcc.0c03003
发表时间: 2020-08-27
期刊: JOURNAL OF PHYSICAL CHEMISTRY C
影响因子: 3.7
作者: [Martin, James D., Hillis, Berkley G., Hou, Feier]
通讯作者: Hou, Feier
6
    SBIR Phase I: Massively Parallel Protocols for Software-based Wireless Systems
    • 批准号:
      2322307
    • 项目类别:
      Standard Grant
    • 资助金额:
      $27.34万
    • 财政年份:
      2023
    • 负责人:
      James Martin
    • 依托单位:
    Helping Students Understand Real-world Applications of Mathematics by Connecting Industry to Math Instruction
    • 批准号:
      1954291
    • 项目类别:
      Standard Grant
    • 资助金额:
      $54.43万
    • 财政年份:
      2020
    • 负责人:
      James Martin
    • 依托单位:
    EAGER: Exploring the Application of Transition Zone Theory to Crystallization from Solutions
    • 批准号:
      1950984
    • 项目类别:
      Standard Grant
    • 资助金额:
      $15.0万
    • 财政年份:
      2019
    • 负责人:
      James Martin
    • 依托单位:
    US Ignite: Track 1: Enabling Connected Vehicle Applications through Advanced Network Technology
    • 批准号:
      1531127
    • 项目类别:
      Standard Grant
    • 资助金额:
      $59.86万
    • 财政年份:
      2015
    • 负责人:
      James Martin
    • 依托单位:
    国内基金
    海外基金
    Cortical control of internal state in the insular cortex-claustrum region