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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.

纳米材料为未来电子和光子技术的革命提供了巨大的前景。尽管付出了巨大的研究努力，将单个纳米级构建块组装成高级功能组件并最终组装成系统仍然是一个挑战。纳米材料的分层集成对于需要精确放置具有极高密度的纳米级构建块的应用尤为重要。这种分层集成的一个重要例子包括大规模组装碳纳米管，因为它们在实现高速和节能的下一代计算系统方面具有巨大的潜力。然而，在精确位置组装高密度纳米管一直是实现可行的基于纳米管的技术的主要障碍。该奖项旨在通过揭示用于选择性放置纳米管的化学组装过程的基础表面科学来缩小科学和技术差距。该项目为研究生和本科生创造了新的研究和教育机会，特别是吸引来自服务不足群体的学生。该项目的科技方面以及劳动力培训将推动国家保持全球技术领先地位。该研究项目的目标是研究基于离子交换化学的设备应用选择性放置碳纳米管 (CNT) 的基础表面科学。这种化学组装过程涉及纳米级的静电荷相互作用。具体来说，电荷相互作用发生在分散在溶液中的带负电的表面活性剂包裹的碳纳米管和纳米级氧化铪（HfO2）沟槽中带正电的自组装分子之间。目前，这种离子交换化学的优化基于一系列反复试验，其中碳纳米管密度被用作唯一可测量的指标。为了了解这些相互作用的本质，研究了一种量化纳米尺度库仑相互作用的新方法。为此，开发了具有纳米级硅通道的嵌入式四端子硅场效应传感器的二维阵列，可以量化小电子电荷。然后在这些传感器上方形成 HfO2 沟槽，以监测不同处理参数对化学组装动力学的影响。该项目建立了对选择性放置高密度碳纳米管的离子交换过程动力学的定量理解。它还开发了一种基于硅传感器二维阵列的新型电化学相机，用于以高时空分辨率记录离子交换化学的动态。这项研究为在硅基板上高密度集成碳纳米管以实现高速、节能的数字逻辑应用铺平了道路。

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