Single ZnO Nanowire for Electrical and Optical NO2 Gas Sensing: Origin of Reversible and Irreversible Gas Effects Investigated by Photoluminescence Spectroscopy

IF 8.2 1区化学 Q1 CHEMISTRY, ANALYTICAL

ACS Sensors Pub Date : 2024-09-11 DOI:10.1021/acssensors.4c00901

Federica Rigoni, Dario Zappa, Camilla Baratto, Guido Faglia, Elisabetta Comini

{"title":"Single ZnO Nanowire for Electrical and Optical NO2 Gas Sensing: Origin of Reversible and Irreversible Gas Effects Investigated by Photoluminescence Spectroscopy","authors":"Federica Rigoni, Dario Zappa, Camilla Baratto, Guido Faglia, Elisabetta Comini","doi":"10.1021/acssensors.4c00901","DOIUrl":null,"url":null,"abstract":"In this work, the gas sensing properties of a single ZnO nanowire (NW) are investigated, simultaneously in terms of photoluminescence (PL) and photocurrent (PC) response to NO2 gas, with the purpose of giving new insights on the gas sensing mechanism of a single 1D ZnO nanostructure. A single ZnO NW sensing device was fabricated, characterized, and compared with a sample made of bundles of ZnO NWs. UV near-band-edge PL emission spectroscopy was carried out at room temperature and by lowering the temperature down to 77 K, which allows detection of resolved PL peaks related to different excitonic transition regions. Surface effects were observed in PL maps, considering different nano and microstructures. Electrical and optical measurements were acquired at the same time during the NO2 gas exposure, allowing for the comparison of PL and PC response times and signal recovery. During NO2 gas desorption, irreversible behavior in the surface-related and donor–acceptor pair (DAP) regions is interpreted as the effect of an initial transient when electronic transfer from the gas molecules to the bulk occurs through the ZnO NW surface which acts as a channel. To the best of our knowledge, this is the first work which investigates the simultaneous PL optical and PC electrical response signals of a single ZnO NW to gas exposure.","PeriodicalId":24,"journal":{"name":"ACS Sensors","volume":null,"pages":null},"PeriodicalIF":8.2000,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Sensors","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acssensors.4c00901","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}

引用次数: 0

Abstract

In this work, the gas sensing properties of a single ZnO nanowire (NW) are investigated, simultaneously in terms of photoluminescence (PL) and photocurrent (PC) response to NO₂ gas, with the purpose of giving new insights on the gas sensing mechanism of a single 1D ZnO nanostructure. A single ZnO NW sensing device was fabricated, characterized, and compared with a sample made of bundles of ZnO NWs. UV near-band-edge PL emission spectroscopy was carried out at room temperature and by lowering the temperature down to 77 K, which allows detection of resolved PL peaks related to different excitonic transition regions. Surface effects were observed in PL maps, considering different nano and microstructures. Electrical and optical measurements were acquired at the same time during the NO₂ gas exposure, allowing for the comparison of PL and PC response times and signal recovery. During NO₂ gas desorption, irreversible behavior in the surface-related and donor–acceptor pair (DAP) regions is interpreted as the effect of an initial transient when electronic transfer from the gas molecules to the bulk occurs through the ZnO NW surface which acts as a channel. To the best of our knowledge, this is the first work which investigates the simultaneous PL optical and PC electrical response signals of a single ZnO NW to gas exposure.

Abstract Image

查看原文本刊更多论文

用于二氧化氮气体电学和光学传感的单根氧化锌纳米线：通过光致发光光谱研究可逆和不可逆气体效应的起源

本研究同时从二氧化氮气体的光致发光（PL）和光致电流（PC）响应方面研究了单根氧化锌纳米线（NW）的气体传感特性，旨在为单个一维氧化锌纳米结构的气体传感机制提供新的见解。我们制作了单个氧化锌纳米线传感装置，对其进行了表征，并将其与由成束氧化锌纳米线组成的样品进行了比较。紫外近带边聚光发射光谱在室温下进行，并将温度降至 77 K，从而检测到与不同激子跃迁区相关的分辨聚光峰。考虑到不同的纳米和微结构，在 PL 图中观察到了表面效应。在二氧化氮气体暴露期间，同时进行了电学和光学测量，从而可以比较聚光和 PC 响应时间以及信号恢复情况。在 NO2 气体解吸过程中，表面相关区域和供体-受体对（DAP）区域的不可逆行为被解释为初始瞬态的影响，即气体分子通过作为通道的 ZnO NW 表面向主体进行电子转移。据我们所知，这是第一项同时研究单个氧化锌氮氧化物对气体暴露的 PL 光学和 PC 电子响应信号的工作。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Sensors Chemical Engineering-Bioengineering

CiteScore

14.50

自引率

3.40%

发文量

372

期刊介绍： ACS Sensors is a peer-reviewed research journal that focuses on the dissemination of new and original knowledge in the field of sensor science, particularly those that selectively sense chemical or biological species or processes. The journal covers a broad range of topics, including but not limited to biosensors, chemical sensors, gas sensors, intracellular sensors, single molecule sensors, cell chips, and microfluidic devices. It aims to publish articles that address conceptual advances in sensing technology applicable to various types of analytes or application papers that report on the use of existing sensing concepts in new ways or for new analytes.

文献相关原料

公司名称	产品信息	采购帮参考价格