相关实验视频

Updated: Jul 11, 2026

Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions

Fabrication of Carbon Nanotube High-Frequency Nanoelectronic Biosensor for Sensing in High Ionic Strength Solutions

Published on: July 22, 2013

基于原子薄层WS的电阻传感器,用于在室温下检测CO和NO

Guruprasad Gorthala¹, Ruma Ghosh¹

¹Department of Electrical, Electronics and Communication Engineering, Indian Institute of Technology Dharwad, Dharwad, Karnataka 580007, India.

|July 3, 2024

概括

二维二硫化物 (WS) 纳米片中的层数影响气体传感. 较厚的WS₂ (BS-WS₂) 显示出更强的NO₂反应,而较薄的WS₂ (PS-WS₂) 可以同时检测到CO和NO₂.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
化学传感器化学传感器

背景情况:

在二维 (2D) 纳米材料中的层数对于诸如气体传感等表面依赖的应用至关重要.
硫化 (WS) 是一个有前途的2D材料,用于各种应用.

研究的目的:

通过液体剥落合成2D WS₂纳米片.
为了研究层数对WS的气体传感性能的影响.
评估WS纳米片用于检测二氧化 (NO) 和一氧化碳 (CO).

主要方法:

使用浴室超声波 (BS-WS₂) 和探头超声波 (PS-WS₂) 进行轻松的液体脱皮.
使用原子力显微镜,电子显微镜,X射线衍射,拉曼光谱,紫外线可见光谱,里埃变换红外光谱和热重力测量分析进行了表征.
在室温下将WS₂样品暴露在NO₂和CO气体中,以评估传感性能.

主要成果:

合成的纳米片的厚度从单层到几层 (PS-WS) 和更厚的层 (BS-WS).
BS-WS₂对2ppmNO₂显示出-14.2%的反应,而更薄的PS-WS₂显示出-3.4%的反应.
PS-WS₂显示了同时检测CO和NO₂的潜力,其检测极限为CO的131ppb和NO₂的81ppb.

结论:

WS₂层的数量显著影响气体传感性能.
原子薄的WS₂ (PS-WS₂) 显示了多气体传感应用的希望.
基于WS2的传感器为准确的气体检测和量化提供了潜力.

关键词:

通过CO传感器进行检测.它的NO2传感器可以检测到NO2的含量.WS2纳米层的使用方法空气质量监测监测空气质量化学阻力传感器液体脱皮方法是一种液体脱皮方法.室温传感器可以传感室温.

更多相关视频

Aerosol-assisted Chemical Vapor Deposition of Metal Oxide Structures: Zinc Oxide Rods

Aerosol-assisted Chemical Vapor Deposition of Metal Oxide Structures: Zinc Oxide Rods

Published on: September 14, 2017

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

A Standard and Reliable Method to Fabricate Two-Dimensional Nanoelectronics

Published on: August 28, 2018

相关概念视频

Thermosensation

Thermosensation

Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...

Temperature Measurement Sites

Temperature Measurement Sites

A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...

Resistivity

Resistivity

When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as:

Non-ohmic Devices

Non-ohmic Devices

In most substances, the current flow is proportional to the voltage applied to it. A simple relationship between the values of current, voltage, and resistance is known as Ohm's law. Nonohmic devices do not exhibit a linear relationship between voltage and current. One such device is the semiconducting circuit element known as a diode. A diode is a circuit device that allows current flow in only one direction.
Consider a simple circuit consisting of a battery, a diode, and a resistor. A diode...

Design Example: Resistive Touchscreen

Design Example: Resistive Touchscreen

A device engineer plays a crucial role in designing user interfaces for mobile devices. One such interface is the resistive touchscreen, which fundamentally consists of two metallic layers: a flexible upper layer and a rigid lower layer, separated by a narrow gap. The high resistance between these two layers is a key characteristic of this design.
When a user touches the screen, the two layers make contact at a specific point known as the touchpoint. This contact reduces the resistance between...

Resistance and Conductance

Resistance and Conductance

A conductor's DC resistance at a given temperature is influenced by its resistivity, length, and cross-sectional area. Resistivity is an inherent property of the conductor material, with annealed copper serving as the international standard for measurement. For instance, the resistivity of hard-drawn aluminum at 20 degrees Celsius is 61% of the standard conductivity of annealed copper.
Various factors impact the resistance of a conductor. Spiraling in stranded conductors increases their length...