基于石墨烯纳米片-类金刚石碳（GNS-DLC）材料的激光诱导等离子体效应建模及其在X射线源阵列传感器中的应用

Modeling of Laser-Induced Plasmon Effects in GNS-DLC-Based Material for Application in X-ray Source Array Sensors.

作者信息

Yakunin Alexander N, Zarkov Sergey V, Avetisyan Yuri A, Akchurin Garif G, Aban'shin Nikolay P, Tuchin Valery V

机构信息

Laboratory of System Problems in Control and Automation in Mechanical Engineering, Institute of Precision Mechanics and Control, RAS, 410028 Saratov, Russia.

Laboratory of Laser Diagnostics of Technical and Living Systems, Institute of Precision Mechanics andControl, RAS, 410028 Saratov, Russia.

出版信息

Sensors (Basel). 2021 Feb 10;21(4):1248. doi: 10.3390/s21041248.

DOI:10.3390/s21041248

PMID:33578701

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7916327/

Abstract

An important direction in the development of X-ray computed tomography sensors in systems with increased scanning speed and spatial resolution is the creation of an array of miniature current sources. In this paper, we describe a new material based on gold nanostars (GNS) embedded in nanoscale diamond-like carbon (DLC) films (thickness of 20 nm) for constructing a pixel current source with photoinduced electron emission. The effect of localized surface plasmon resonance in GNS on optical properties in the wavelength range from UV to near IR, peculiarities of localization of field and thermal sources, generation of high-energy hot electrons, and mechanisms of their transportation in vacuum are investigated. The advantages of the proposed material and the prospects for using X-ray computed tomography in the matrix source are evaluated.

摘要

在具有更高扫描速度和空间分辨率的系统中，X射线计算机断层扫描传感器发展的一个重要方向是创建微型电流源阵列。在本文中，我们描述了一种基于嵌入纳米级类金刚石碳（DLC）薄膜（厚度为20纳米）中的金纳米星（GNS）的新型材料，用于构建具有光致电子发射的像素电流源。研究了GNS中局域表面等离子体共振对紫外到近红外波长范围内光学性质的影响、场源和热场源的局域特性、高能热电子的产生及其在真空中的传输机制。评估了所提出材料的优点以及在矩阵源中使用X射线计算机断层扫描的前景。