Mass Sensing, Strong Vibrational Coupling and Super-Resolution Imaging of Noble Metal Nanostructures

贵金属纳米结构的质量传感、强振动耦合和超分辨率成像

基本信息

批准号：
2002300
负责人：
Gregory Hartland
金额：
$ 50.65万
依托单位：
University of Notre Dame
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2002300&HistoricalAwards=false
关键词：
Mass Sensing Strong Vibrational Coupling

项目摘要

The Macromolecular, Supramolecular, and Nanochemistry Program in the Chemistry Division supports Professor Gregory V. Hartland and his group at the University of Notre Dame to create ultra-small, nanometer-sized mass balances that can operate at room temperature. All objects vibrate and the vibration frequencies depend on the size and shape of the object. These vibration frequencies are very high for nanoparticles and they change when two particles are attached to each other. Using this effect, this project contributes to sensing particles whose sizes make them very difficult to detect with conventional techniques. By accurately measuring mass, the researchers are able to identify unknown particles such as viruses. The fundamental knowledge gained from this study can also enable the detection of a variety of chemicals and particles in the environment. The accurate detection of chemicals and particles is important for assessing potential risks from environmental and biological hazards. This research provides training and education to graduate and undergraduate students at the University of Notre Dame as well as from local primarily undergraduate institutions (PUIs). This project also provides research experience for high school students and teachers from Elkhart Community Schools. The vibrational modes of metal nanostructures suspended in air or placed on low density substrates have very high quality factors which allows their frequencies to be accurately measured. With this award from the Macromolecular, Supramolecular, and Nanochemistry Program, Professor Hartland and his group at the University of Notre Dame use suspended nanostructures to study how the vibrational modes of the nanostructures are affected by adsorbed mass. They also examine the coupling between the vibrational modes of different nanostructures, and coherently control the vibrational motion of coupled nanostructures. These experiments are performed by transient absorption microscopy implemented with asynchronous optical sampling, a dual laser technique that avoids the use of a mechanical delay line to record data. The results of the measurements allow the masses of large uncharged particles to be directly determined, which is a challenge for conventional mass spectrometers. In addition, ultrafast mid-infrared pump transient absorption microscopy is used to image the plasmon resonances of single metal nanostructures. These experiments generate new information about the form of the plasmon modes of these structures, which is important for understanding the field enhancements that are central to surface enhanced spectroscopies.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.

化学部的高分子、超分子和纳米化学项目支持圣母大学的 Gregory V. Hartland 教授和他的团队创建可在室温下运行的超小型纳米级质量平衡。所有物体都会振动，振动频率取决于物体的大小和形状。这些振动频率对于纳米颗粒来说非常高，并且当两个颗粒彼此附着时它们会发生变化。利用这种效应，该项目有助于传感尺寸使其很难用传统技术检测到的颗粒。通过精确测量质量，研究人员能够识别病毒等未知颗粒。从这项研究中获得的基础知识还可以检测环境中的各种化学物质和颗粒。准确检测化学品和颗粒对于评估环境和生物危害的潜在风险非常重要。这项研究为圣母大学以及当地本科院校 (PUI) 的研究生和本科生提供培训和教育。该项目还为埃尔克哈特社区学校的高中生和教师提供研究经验。悬浮在空气中或放置在低密度基底上的金属纳米结构的振动模式具有非常高的品质因数，可以精确测量它们的频率。凭借高分子、超分子和纳米化学项目的这一奖项，哈特兰教授和他在圣母大学的团队使用悬浮纳米结构来研究纳米结构的振动模式如何受到吸附质量的影响。他们还检查了不同纳米结构振动模式之间的耦合，并连贯地控制耦合纳米结构的振动运动。这些实验是通过采用异步光学采样实现的瞬态吸收显微镜进行的，这是一种双激光技术，避免使用机械延迟线来记录数据。测量结果可以直接确定大的不带电粒子的质量，这对传统质谱仪来说是一个挑战。此外，超快中红外泵浦瞬态吸收显微镜用于对单一金属纳米结构的等离激元共振进行成像。这些实验产生了有关这些结构的等离激元模式形式的新信息，这对于理解表面增强光谱学的核心场增强非常重要。该奖项反映了 NSF 的法定使命，并通过使用基金会的评估进行评估，被认为值得支持。智力价值和更广泛的影响审查标准。

项目成果

期刊论文数量（7）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Energy Dissipation for Nanometer Sized Acoustic Oscillators

纳米级声振荡器的能量耗散

DOI：
10.1021/acs.jpcc.1c10073.s001
发表时间：
2022-02-03
期刊：
The Journal of Physical Chemistry C
影响因子：
0
作者：
Kuai Yu;Yiqi Jiang;Cameron Wright;G. Hartl
通讯作者：
G. Hartl

Photoinduced Transformation of Cs 2 Au 2 Br 6 into CsPbBr 3 Nanocrystals

Cs 2 Au 2 Br 6 光诱导转化为 CsPbBr 3 纳米晶

DOI：
10.1021/acs.jpclett.2c00473
发表时间：
2022-04
期刊：
The Journal of Physical Chemistry Letters
影响因子：
0
作者：
Chakkamalayath, Jishnudas;Hartland, Gregory V.;Kamat, Prashant V.
通讯作者：
Kamat, Prashant V.

Compressible viscoelasticity of cell membranes determined by gigahertz-frequency acoustic vibrations

由千兆赫频率声振动确定的细胞膜的可压缩粘弹性

DOI：
10.1016/j.pacs.2023.100494
发表时间：
2023-06
期刊：
Photoacoustics
影响因子：
7.9
作者：
Yu, Kuai;Jiang, Yiqi;Chen, Yungao;Hu, Xiaoyan;Chang, Junlei;V. Hartland, Gregory;Wang, Guo Ping
通讯作者：
Wang, Guo Ping

Polymer dependent acoustic mode coupling and Hooke’s law spring constants in stacked gold nanoplates

堆叠金纳米板中聚合物相关的声模耦合和胡克定律弹簧常数

DOI：
10.1063/5.0066661
发表时间：
2021-10
期刊：
The Journal of Chemical Physics
影响因子：
0
作者：
Wang, Junzhong;Li, Mengying;Jiang, Yiqi;Yu, Kuai;Hartland, Gregory V.;Wang, Guo Ping
通讯作者：
Wang, Guo Ping

Nanoparticle–Fluid Interactions at Ultrahigh Acoustic Vibration Frequencies Studied by Femtosecond Time-Resolved Microscopy

通过飞秒时间分辨显微镜研究超高声振动频率下的纳米颗粒与流体相互作用