Studies of Ion-Exchange Process for Selective Placement of High-Density Carbon Nanotubes for Digital Logic Applications

用于数字逻辑应用的选择性放置高密度碳纳米管的离子交换过程研究

基本信息

批准号：
1728051
负责人：
Davood Shahrjerdi
金额：
$ 29.2万
依托单位：
New York University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-10-01 至 2021-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1728051&HistoricalAwards=false
关键词：
Studies Ion Exchange Process Selective

项目摘要

Nanomaterials offer tremendous prospects to revolutionize future electronic and photonic technologies. Despite enormous research efforts, assembling individual nanoscale building blocks into high-level functional assemblies and ultimately into systems remains a challenge. The hierarchical integration of nanomaterials is particularly important for applications that require precise placement of nanoscale building blocks with exceedingly high density. An important example of such hierarchical integration includes assembling carbon nanotubes on a large scale due to their tremendous potential for realizing next-generation computing systems that are high-speed and power-efficient. However, assembling nanotubes with high density in precise locations has been a major roadblock for enabling a viable nanotube-based technology. This award aims at bridging the scientific and technological gap by uncovering the fundamental surface science of a chemical assembly process that is used for selective placement of nanotubes. The project creates new research and educational opportunities for graduate and undergraduate students, specifically engaging students from underserved groups. The scientific and technological aspects of the project, along with the workforce training, will boost the efforts of the nation in maintaining global technological leadership. The goal of this research project is to study the fundamental surface science of selective placement of carbon nanotubes (CNTs) based on ion-exchange chemistry for device applications. This chemical assembly process involves electrostatic charge interactions at the nanoscale. Specifically, the charge interactions occur between negatively charged surfactant-wrapped CNTs dispersed in a solution and positively charged self-assembled molecules in nanoscale hafnium oxide (HfO2) trenches. Currently, the optimization of this ion-exchange chemistry is based on a series of trial and error experiments in which the CNT density is used as the only measurable metric. To understand the nature of these interactions, a new methodology that quantifies the Coulombic interactions at nanoscale is studied. To this end, a two-dimensional array of embedded 4-terminal silicon field-effect sensors with nanoscale silicon channels that allow quantifying small electronic charges are developed. The HfO2 trenches are then formed above these sensors to monitor the effect of different processing parameters on the kinetics of the chemical assembly. The project establishes a quantitative understanding of the kinetics of the ion-exchange process for selective placement of high-density CNTs. It also develops a new electrochemical camera based on a 2D array of the silicon sensors for recording the dynamics of the ion-exchange chemistry with high spatiotemporal resolution. This research paves the way for high-density integration of CNTs on silicon substrates for high-speed and power-efficient digital logic applications.

纳米材料为彻底改变未来的电子和光子技术提供了巨大的前景。尽管进行了巨大的研究工作，但将单个纳米级的构建块组装成高级功能组件，并最终将其汇集到系统中仍然是一个挑战。纳米材料的分层整合对于需要精确放置纳米级构建块的应用尤其重要。这种分层整合的一个重要例子包括大规模组装碳纳米管，因为它们具有高速和发电效率的下一代计算系统的巨大潜力。然而，在精确位置组装高密度的纳米管是实现可行的基于纳米管技术的主要障碍。该奖项旨在通过发现用于选择性放置纳米管的化学组装过程的基本表面科学来弥合科学和技术差距。该项目为研究生和本科生创造了新的研究和教育机会，特别是吸引了服务不足的小组的学生。该项目的科学和技术方面以及劳动力培训将促进国家在维持全球技术领导力方面的努力。该研究项目的目的是研究基于用于设备应用的离子 - 交换化学的选择性放置碳纳米管（CNT）的基本表面科学。该化学组装过程涉及纳米级的静电电荷相互作用。具体而言，电荷相互作用发生在分散在溶液中并在纳米氧化物Hafnium Hafnium Hafnium hafnium（HFO2）沟中进行负电荷的表面活性剂包裹的CNT之间发生。当前，该离子交换化学的优化基于一系列试验和误差实验，其中CNT密度用作唯一可测量的度量。为了了解这些相互作用的性质，研究了一种量化纳米级库仑相互作用的新方法。为此，开发了二维嵌入的4末端硅场效应传感器，并带有纳米级硅通道，允许量化小型电子电荷。然后在这些传感器上方形成HFO2沟渠，以监测不同加工参数对化学组装动力学的影响。该项目对高密度CNT的选择性放置的离子交换过程的动力学建立了定量的理解。它还基于硅传感器的2D阵列来开发新的电化学摄像头，用于记录具有高时空分辨率的离子交换化学的动力学。这项研究为在硅底物上高密度整合的高密度整合铺平了道路，用于高速和发电的数字逻辑应用。

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）

Effects of single vacancy defects on 1/f noise in grapbene/b-BN FETs

石墨烯/b-BN FET 中单个空位缺陷对 1/f 噪声的影响

DOI：
10.1109/drc.2018.8442196
发表时间：
2018
期刊：
IEEE Device Research Conference
影响因子：
0
作者：
Wu, Ting;Alharbi, Abdullah;Taniguchi, Takashi;Watanabe, Kenji;Shahrjerdi, Davood
通讯作者：
Shahrjerdi, Davood

An Electrochemical Biochip for Measuring Low Concentrations of Analytes With Adjustable Temporal Resolutions

DOI：
10.1109/tbcas.2020.3009303
发表时间：
2020-07
期刊：
IEEE Transactions on Biomedical Circuits and Systems
影响因子：
5.1
作者：
Kae-Dyi You;Edoardo Cuniberto;Shao-Cheng Hsu;Bohan Wu;Zhujun Huang;Xiaochang Pei;D. Shahrjerdi
通讯作者：
Kae-Dyi You;Edoardo Cuniberto;Shao-Cheng Hsu;Bohan Wu;Zhujun Huang;Xiaochang Pei;D. Shahrjerdi

Nano-engineering the material structure of preferentially oriented nano-graphitic carbon for making high-performance electrochemical micro-sensors