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Transforming Noble Metal Nanostructure Synthesis Using Unconventional Synthetic Levers

使用非常规合成杠杆转变贵金属纳米结构合成

基本信息

批准号：
1803917
负责人：
Svetlana Neretina
金额：
$ 29.99万
依托单位：
University of Notre Dame
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2018
资助国家：
美国
起止时间：
2018-08-01 至 2021-07-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1803917&HistoricalAwards=false
关键词：
Transforming Noble Metal Nanostructure Synthesis

项目摘要

Non-Technical Abstract:Underpinning the electronics industry is a wafer-based processing science that is able to form intricate patterns of dissimilar materials with well-defined properties and interfaces that collectively perform a useful function. One of the biggest challenges is the establishment of a corresponding processing science that integrates these wafer-based technologies with the extraordinary optical, electronic, and chemical properties derived from metallic nanoparticles. Device prototyping has, however, been stifled by an inability to define complex metal nanostructures in organized patterns where interactions are possible between adjacent structures and with the underlying wafer material. The project being carried out aims to overcome this impediment by redefining the methodologies, instrumentation, and processing science needed to define wafer-based metal nanostructures, and in doing so, provide the capabilities inaccessible through conventional methods. The research activities are being integrated with undergraduate education that involves the supervision of research internships geared toward the advancement of laboratory instrumentation by students from the College of Engineering. Outreach activities place emphasis on the matriculation of women into the engineering profession.Technical Abstract:The research being carried out aims to provide an understanding of the altered chemistry that arises when well-understood seed-mediated noble metal nanostructure growth modes are subjected to four unconventional synthetic levers that become accessible when seeds are immobilized on a rigid crystalline substrate. It is founded on a synthetic strategy that is able to realize periodic arrays of complex noble metal nanostructures through a three stage synthetic scheme that uses (i) a lithography-defined shadow mask to fabricate nanostructured precursors at site-specific locations, (ii) directed assembly to transform them into single crystal templates, and (iii) solution-based chemistry to further transform them into complex nanostructures. Within the scope of this strategy lies the opportunity to incorporate a new set of synthetic levers into nanostructure synthesis that fundamentally alter well-established growth modes. The project is advancing the use and understanding of four such synthetic levers: (i) a flow of reactants past an anchored substrate, (ii) synthetically-active substrate materials, (iii) substrate-imposed epitaxy, and (iv) lithographically-imposed barriers to growth. Graduate students are being trained in nanostructure synthesis and characterization, lithographic techniques, and the preparation nanostructured surfaces. This work is, hence, contributing to the grander vision that sees the extraordinary physicochemical properties of nanomaterials united with the wafer-based materials, processing techniques, and electronic devices.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.

非技术摘要：支撑电子工业的是一门基于晶圆的加工科学，它能够形成具有明确定义的特性和界面的不同材料的复杂图案，这些材料共同执行有用的功能。最大的挑战之一是建立相应的加工科学，将这些基于晶圆的技术与金属纳米颗粒产生的非凡的光学、电子和化学性质相结合。然而，由于无法以有组织的模式定义复杂的金属纳米结构，使得相邻结构之间以及与底层晶圆材料之间的相互作用成为可能，因此器件原型设计一直受到阻碍。正在进行的项目旨在通过重新定义定义晶圆金属纳米结构所需的方法、仪器和处理科学来克服这一障碍，并在此过程中提供传统方法无法实现的功能。这些研究活动与本科教育相结合，包括监督工程学院学生的研究实习，以促进实验室仪器的发展。外联活动的重点是使妇女进入工程专业。技术摘要：这项研究的目的是了解当种子介导的贵金属纳米结构生长模式受到四种非常规合成杠杆的影响时所产生的化学变化，当种子固定在刚性晶体基质上时，这些杠杆就变得容易获得。它基于一种合成策略，能够通过三个阶段的合成方案实现复杂贵金属纳米结构的周期性阵列，该合成方案使用(i)光刻定义的阴影掩膜在特定位置制造纳米结构前体，（ii）定向组装将其转化为单晶模板，以及（iii）基于溶液的化学将其进一步转化为复杂的纳米结构。在这一策略的范围内，有机会将一套新的合成杠杆纳入纳米结构合成，从根本上改变现有的生长模式。该项目正在推进对四种合成杠杆的使用和理解：(i)反应物流过固定基板，（ii）合成活性基板材料，（iii）基板施加外延，（iv）光刻施加生长障碍。研究生正在接受纳米结构合成和表征、光刻技术和纳米结构表面制备方面的培训。因此，这项工作有助于实现纳米材料与晶片基材料、加工技术和电子设备相结合的非凡物理化学特性的宏伟愿景。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

期刊论文数量（9）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Highly efficient visible light phenyl modified carbon nitride/TiO2 photocatalyst for environmental applications

DOI：
10.1016/j.apsusc.2020.147394
发表时间：
2020-11-30
期刊：
APPLIED SURFACE SCIENCE
影响因子：
6.7
作者：
Porcu, Stefania;Castellino, Micaela;Ricci, Pier Carlo
通讯作者：
Ricci, Pier Carlo

Substrate-immobilized noble metal nanoplates: a review of their synthesis, assembly, and application

DOI：
10.1039/d1tc01494c
发表时间：
2021
期刊：
Journal of Materials Chemistry C
影响因子：
6.4
作者：
R. D. Neal;R. Hughes;Arin S. Preston;Spencer D. Golze;Trevor B. Demille;S. Neretina
通讯作者：
R. D. Neal;R. Hughes;Arin S. Preston;Spencer D. Golze;Trevor B. Demille;S. Neretina

Catalytic Reduction of 4-Nitrophenol by Gold Catalysts: The Influence of Borohydride Concentration on the Induction Time