CAREER: Structure of Inorganic Nanoparticle Surface Interfaces Plus Multidisciplinary Nanochemistry Undergraduate Teaching Lab

职业：无机纳米颗粒表面界面结构加多学科纳米化学本科教学实验室

• 批准号: 1455099
• 负责人: Christopher Ackerson
• 金额: $ 50万
• 依托单位: Colorado State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2020-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1455099&HistoricalAwards=false
• 关键词: CAREER; Structure; Inorganic; Nanoparticle; Surface

With this CAREER Award, the Macromolecular Supramolecular and Nanochemistry Program of the Chemistry Division is funding Professor Christopher J. Ackerson of Colorado State University to develop a better understanding of metal nanoparticle surfaces. Metal nanoparticles have dimensions of 1 billionth of a meter. At this small scale, metallic particles have properties that are different than those of familiar bulk metals. Understanding what the surfaces of nanoparticles look like, and how these surfaces behave pose special challenges for scientific study. This project aims to produce an improved picture of metal nanoparticle surfaces, with improved understanding of how these surfaces behave. This improved understanding may yield dividends in applications of nanoparticles for catalysis, medicines, and research enabling tools. The educational goal of this project is to enhance undergraduate scientific education by developing a nanoscience teaching laboratory course that covers the synthesis and characterization of nanostructured materials. The majority of the class uses methods that are not part of the undergraduate chemistry curriculum, but are widely used in the research science setting. The broader impacts of the project developing a gold nanoparticle outreach activity at the Fort Collins Museum of Science and Discoverys annual 4th Grade Rendezvous, where Ackerson and team members will relate the history of gold mining in Colorado to the modern scientific study of gold chemistry.The research objective of this project is to improve understanding of the structure and reactivity of metal nanoparticle surfaces. The Ackerson group will endeavor to establish the structural basis of ligand exchange on inorganic nanoparticles, beginning with thiolate protected gold nanoparticles. The research team will use the surprisingly low symmetry nanomolecules Au102(SR)44 and Au25(SR)18 as starting points to establish a mechanistic understanding of ligand exchange. These studies are also directed at understanding weak ligand binding and how multivalent weak ligands can create dynamic assemblies of nanoclusters with emergent optical and spin properties. The broader impacts of this work include the generation of atomisitic models of mixed ligand shells that will underpin theory work done by others, as well as the dissemination of materials and expertise into disciplinary labs in biological electron microscopy and nano-biomedicine.

有了这个职业奖，化学系的大分子超分子和纳米化学计划正在资助科罗拉多州立大学的Christopher J. Ackerson教授，以更好地了解金属纳米颗粒表面。 金属纳米颗粒的尺寸为十亿分之一米。 在这种小尺度下，金属颗粒具有与常见的块状金属不同的性质。了解纳米粒子的表面是什么样子，以及这些表面如何表现，对科学研究提出了特殊的挑战。该项目旨在产生金属纳米颗粒表面的改进图像，并更好地了解这些表面的行为。 这种改进的理解可能会在纳米颗粒用于催化，药物和研究工具的应用中产生红利。 该项目的教育目标是通过开发纳米科学教学实验室课程，涵盖纳米结构材料的合成和表征，以提高本科生的科学教育。 大部分的类使用的方法，不是本科化学课程的一部分，但广泛用于研究科学设置。在柯林斯堡科学与发现博物馆的年度四年级活动中，Ackerson和团队成员将把科罗拉多金矿开采的历史与现代黄金化学的科学研究联系起来。该项目的研究目标是提高对金属纳米颗粒表面结构和反应性的理解。 Ackerson小组将奋进建立无机纳米粒子上配体交换的结构基础，从硫醇盐保护的金纳米粒子开始。 研究小组将使用令人惊讶的低对称性纳米分子Au 102（SR）44和Au 25（SR）18作为起点，以建立对配体交换的机理理解。 这些研究也是针对理解弱配体结合和多价弱配体如何可以创建动态组装的纳米团簇与新兴的光学和自旋特性。这项工作的更广泛的影响包括生成混合配体壳的原子模型，这将支持其他人所做的理论工作，以及将材料和专业知识传播到生物电子显微镜和纳米生物医学的学科实验室。