气体传感器阵列中的紫外光强度调制,用于在室温下分辨多种分析物

IF 1.4 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Ahmad Reza Sadredini, Alireza Nikfarjam, Mohsen Naeimi Pour, Niloofar Nazeri
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引用次数: 0

摘要

在这项研究中,利用气体传感器阵列和紫外光强度调制在室温下分辨多种气体。传感器阵列由两个相互咬合的微电极组成,在微电极上电纺了 TiO2 纳米纤维,并在 540°C 煅烧 90 分钟。其中一个传感器采用直流溅射法镀上了 2 纳米铂,另一个则没有镀膜。在每次实验中,传感器阵列与 365 纳米紫外线 LED 的距离均为 30 毫米。为了调节紫外光的强度,在紫外 LED 上施加了阶梯波形电压。电压包括三个电压阶梯,在距离紫外发光二极管 30 毫米处测得的功率分别约为 450、560 和 680 µW/cm2。研究对象包括丙酮、乙醇、甲醇、2-丙醇和一氧化碳 (CO),浓度范围为 50 至 500 ppm。三维主成分分析制图被成功用于分离所有检测气体。研究结果表明,使用传感器阵列和紫外光强度调制是在室温下分辨多种分析物的有效方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Intensity modulation of UV light in gas sensor array to discriminate several analytes at room temperature

Intensity modulation of UV light in gas sensor array to discriminate several analytes at room temperature

In this study, a gas sensor array along with intensity modulation of UV light was utilized to discriminate several gases at room temperature. The sensor array was consisted of two interdigitated microelectrodes and TiO2 nanofibres were electrospun on them and calcined at 540°C for 90 min. One of these sensors was coated by 2-nm Pt using the DC sputtering method and the other one remained uncoated. In each experiment, the sensor array was located at a distance of 30 mm from a 365-nm UV LED. For intensity modulation of UV light, a staircase waveform voltage was applied to the UV LED. The voltage was included of three voltage steps and the measured powers at a distance of 30 mm from the UV-LED were about 450, 560, and 680 µW/cm2, respectively. Analytes including acetone, ethanol, methanol, 2-propanol, and carbon monoxide (CO) at various concentrations ranging from 50 to 500 ppm were examined. Three-dimensional Principal Component Analysis mapping was successfully used for the segregation of all examined gases. The examinations revealed that using sensor array along with intensity modulation of UV light is an effective method for discrimination of several analytes at room temperature.

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来源期刊
Iet Science Measurement & Technology
Iet Science Measurement & Technology 工程技术-工程:电子与电气
CiteScore
4.30
自引率
7.10%
发文量
41
审稿时长
7.5 months
期刊介绍: IET Science, Measurement & Technology publishes papers in science, engineering and technology underpinning electronic and electrical engineering, nanotechnology and medical instrumentation.The emphasis of the journal is on theory, simulation methodologies and measurement techniques. The major themes of the journal are: - electromagnetism including electromagnetic theory, computational electromagnetics and EMC - properties and applications of dielectric, magnetic, magneto-optic, piezoelectric materials down to the nanometre scale - measurement and instrumentation including sensors, actuators, medical instrumentation, fundamentals of measurement including measurement standards, uncertainty, dissemination and calibration Applications are welcome for illustrative purposes but the novelty and originality should focus on the proposed new methods.
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