Studies of Physical Adsorption
Studies of Physical Adsorption
批准号:
9022681
负责人:
Moses Chan
金额:
$189.23万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1991
资助国家:
美国
项目状态:
已结题
起止时间:
1991-09-15 至 1998-02-28
中文摘要
成立了一个新材料研究小组,研究物理吸附薄膜中的物理吸附和相变的基本方面。这项研究的目的是研究物理吸附薄膜的结构和动力学,以及这些相的性质和它们之间的转变。这项研究分为五个主题:(1)石墨表面单层Ar膜的熔化,(2)双吸附体薄膜的相变,(3)简单气体在表征良好的沸石多孔介质中的性质,(4)弱结合衬底上单层和多层氦薄膜的特殊性质,(5)薄膜的脱附和氦原子散射。实验工作包括热容量测量、原位蒸汽压等温线研究、非弹性氦散射、高分辨率低能电子衍射、非弹性氦散射、中子散射、飞行时间解吸测量以及润湿和超流体研究。分子动力学计算机模拟被用来提供对薄膜和受限流体的吸附行为和相变的真实模拟。在该计划的理论推进中,使用势能模型和统计力学方法研究了吸附体系的相互作用势、原子-表面散射以及经典和量子跃迁。实验、计算模拟和理论的强耦合使得孤立的方法不可能取得进展。
英文摘要
A new Materials research Group is established to investigate fundamental aspects of physical adsorption and phase transitions in physisorbed films. The goals of the research are to study both the structure and kinetics of physisorbed films, and the nature of these phases and the transitions between them. The research is organized into five topics: (1) melting of monolayer argon films on graphite, (2) phase transitions of films of binary adsorbates, (3) properties of simple gases in a well- characterized zeolite porous medium, (4) unusual properties of monolayer and multilayer helium films on weak-binding substrates, (5) desorption and helium atom scattering of films. Experimental efforts include measurement of heat capacity, in-situ vapor pressure isotherm study, inelastic helium scattering, high- resolution low-energy electron diffraction, inelastic helium scattering, neutron scattering, time-of-flight desorption measurements, and wetting and superfluid studies. Molecular dynamics computer simulation is being used to provide realistic modelling of adsorbate behavior and phase transitions of thin films and confined fluids. Interaction potentials, atom-surface scattering, and classical and quantum transitions of adsorbate systems are being studied in the theoretical thrusts of the program using potential energy models and statistical mechanics approaches. The strong coupling of experiment, computational simulation and theory are making advances not possible by isolated approaches.
期刊论文(0)
专著(0)
科研奖励(0)
会议论文
Mass transport through solid helium
-
批准号:1707340
-
项目类别:Continuing Grant
-
资助金额:$46.78万
-
财政年份:2017
-
负责人:Moses Chan
-
依托单位:
Workshop to meet the grand challenges in quantum fluids and solids
-
批准号:1523582
-
项目类别:Standard Grant
-
资助金额:$4.98万
-
财政年份:2015
-
负责人:Moses Chan
-
依托单位:
EAGER: Is Na-NH3 a High Temperature Superconductor?
-
批准号:1431408
-
项目类别:Continuing Grant
-
资助金额:$22.0万
-
财政年份:2014
-
负责人:Moses Chan
-
依托单位:
Supersolidity and the Supersolid to Normal Solid Transition
-
批准号:1103159
-
项目类别:Continuing Grant
-
资助金额:$92.5万
-
财政年份:2011
-
负责人:Moses Chan
-
依托单位:
Collaborative Research: Synchrotron X-Ray Scattering Experiments on Solid Helium
-
批准号:0804554
-
项目类别:Continuing Grant
-
资助金额:$5.1万
-
财政年份:2008
-
负责人:Moses Chan
-
依托单位:
REU Site: Penn State Research Experience for Undergraduates and Teachers Program in Condensed Matter Physics and Interdisciplinary Materials Research
-
批准号:0648837
-
项目类别:Continuing Grant
-
资助金额:$52.0万
-
财政年份:2007
-
负责人:Moses Chan
-
依托单位:
Studies of the Supersolid State of Matter
-
批准号:0706339
-
项目类别:Continuing Grant
-
资助金额:$72.0万
-
财政年份:2007
-
负责人:Moses Chan
-
依托单位:
REU Site: RET: Penn State Physics Department Research Experience for Undergraduates and Teachers Program
-
批准号:0353890
-
项目类别:Continuing Grant
-
资助金额:$46.4万
-
财政年份:2004
-
负责人:Moses Chan
-
依托单位:
Quantum Fluids in One and Two Dimensions
-
批准号:0207071
-
项目类别:Continuing Grant
-
资助金额:$37.5万
-
财政年份:2002
-
负责人:Moses Chan
-
依托单位:
MRSEC: Center for Porous Materials
-
批准号:0080019
-
项目类别:Cooperative Agreement
-
资助金额:$485.0万
-
财政年份:2000
-
负责人:Moses Chan
-
依托单位:
Effects of Confinement on Quantum Fluids
-
批准号:9971471
-
项目类别:Continuing Grant
-
资助金额:$42.0万
-
财政年份:1999
-
负责人:Moses Chan
-
依托单位:
Effects of Disorder on Phase Transitions of Quantum Fluids
-
批准号:9630736
-
项目类别:Continuing Grant
-
资助金额:$42.0万
-
财政年份:1996
-
负责人:Moses Chan
-
依托单位:
Acquisition of a Helium 3 Refrigerator for Synchrotron X-ray Studies
-
批准号:9625919
-
项目类别:Standard Grant
-
资助金额:$7.86万
-
财政年份:1996
-
负责人:Moses Chan
-
依托单位:
Physics Research Experiences for Undergraduates at the Pennsylvania State University
-
批准号:9322172
-
项目类别:Continuing Grant
-
资助金额:$22.12万
-
财政年份:1994
-
负责人:Moses Chan
-
依托单位:
Phase Transitions in the Presence of Disorder
-
批准号:9311918
-
项目类别:Continuing Grant
-
资助金额:$40.0万
-
财政年份:1993
-
负责人:Moses Chan
-
依托单位:
Dynamics and Energetics of Atomic Processes on Solid Surfaces
-
批准号:9008658
-
项目类别:Continuing Grant
-
资助金额:$21.0万
-
财政年份:1991
-
负责人:Moses Chan
-
依托单位:
Phase Transition Studies of Confined Helium
-
批准号:9008461
-
项目类别:Continuing Grant
-
资助金额:$28.44万
-
财政年份:1990
-
负责人:Moses Chan
-
依托单位:
Phase Transition Studies of Adsorbed Films
-
批准号:8701651
-
项目类别:Continuing Grant
-
资助金额:$30.8万
-
财政年份:1987
-
负责人:Moses Chan
-
依托单位:
Acquisition of a Helium3-Helium4 Refrigerator System (Materials Research)
-
批准号:8314674
-
项目类别:Standard Grant
-
资助金额:$8.0万
-
财政年份:1984
-
负责人:Moses Chan
-
依托单位:
Phase Transition Studies of Fluids at Low Temperatures (Materials Research)
-
批准号:8206109
-
项目类别:Continuing Grant
-
资助金额:$32.6万
-
财政年份:1982
-
负责人:Moses Chan
-
依托单位:
国内基金
海外基金
面向智能电网基础设施Cyber-Physical安全的自治愈基础理论研究
-
批准号:61300132
-
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:王竹晓
-
依托单位: