Fabrication of Room Temperature Resistive Ethanol Gas Sensor Based on ZnO Nanorods Decorated with PbS Nanoparticles

A resistive ethanol gas sensor with a high sensitivity has been proposed. The fabricated gas sensor has a very promising response and recovery at room temperature. The proposed sensor has been fabricated by depositing sensitive nanostructured material on printed circuit board interdigitated electrodes. As the sensitive material, ZnO nanorods of high uniformity have been synthesized by hydrothermal method and then decorated by PbS nanoparticles. The synthesized decorated nanorods were characterized by X-ray diffraction and scanning electron microscope which confirmed the formation of the desired nanostructures. The ethanol gas sensing properties of the ZnO nanorods decorated with PdS nanoparticles was measured in a test chamber. The minimum ethanol concentration detected by the sensor has been 10 ppm. The results showed the higher sensitivity of the proposed sensor to the ethanol at room temperature compared to similar works.

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A Novel Type Room Temperature Surface Photovoltage Gas Sensor Device

10.20944/preprints201807.0572.v1 ◽

2018 ◽

Author(s):

Monika Kwoka ◽

Michal A. Borysiewicz ◽

Pawel Tomkiewicz ◽

Anna Piotrowska ◽

Jacek Szuber

Keyword(s):

Gas Sensor ◽

Room Temperature ◽

Gas Sensing ◽

Signal To Noise Ratio ◽

High Sensitivity ◽

Fast Response ◽

Surface Photovoltage ◽

Kelvin Probe ◽

Sensor Device ◽

Developed Surface

In this paper a novel type of a highly sensitive gas sensor device based on the surface photovoltage effect is described. The developed surface photovoltage gas sensor is based on a reverse Kelvin probe approach. As the active gas sensing electrode the porous ZnO nanostructured thin films are used deposited by the direct current (DC) reactive magnetron sputtering method exhibiting the nanocoral surface morphology combined with an evident surface nonstoichiometry related to the unintentional surface carbon and water vapor contaminations. Among others, the demonstrated SPV gas sensor device exhibits a high sensitivity of 1 ppm to NO2 with a signal to noise ratio of about 50 and a fast response time of several seconds under the room temperature conditions.

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Ammonia Gas Detection by Tannic Acid Functionalized and Reduced Graphene Oxide at Room Temperature

Journal of Nanomaterials ◽

10.1155/2014/497384 ◽

2014 ◽

Vol 2014 ◽

pp. 1-6 ◽

Cited By ~ 40

Author(s):

Sweejiang Yoo ◽

Xin Li ◽

Yuan Wu ◽

Weihua Liu ◽

Xiaoli Wang ◽

...

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Gas Sensor ◽

Tannic Acid ◽

Room Temperature ◽

Gas Sensing ◽

High Sensitivity ◽

Gas Detection ◽

Ammonia Gas ◽

Reduced Graphene

Reduced graphene oxide (rGO) based chemiresistor gas sensor has received much attention in gas sensing for high sensitivity, room temperature operation, and reversible. Here, for the first time, we present a promising chemiresistor for ammonia gas detection based on tannic acid (TA) functionalized and reduced graphene oxide (rGOTA functionalized). Green reductant of TA plays a major role in both reducing process and enhancing the gas sensing properties ofrGOTA functionalized. Our results showrGOTA functionalizedonly selective to ammonia with excellent respond, recovery, respond time, and recovery times.rGOTA functionalizedelectrical resistance decreases upon exposure to NH3where we postulated that it is due to n-doping by TA and charge transfer betweenrGOTA functionalizedand NH3through hydrogen bonding. Furthermore,rGOTA functionalizedhinders the needs for stimulus for both recovery and respond. The combination of greener sensing material and simplicity in overall sensor design provides a new sight for green reductant approach of rGO based chemiresistor gas sensor.

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2D/2D/2D Ti3C2Tx@TiO2@MoS2 Heterostructure as Ultrafast and High-sensitivity NO2 Gas Sensor at Room-temperature

Journal of Materials Chemistry A ◽

10.1039/d1ta09369j ◽

2022 ◽

Author(s):

Zhuo Liu ◽

He Lv ◽

Ying Xie ◽

Jue Wang ◽

Jiahui Fan ◽

...

Keyword(s):

Gas Sensor ◽

Gas Sensors ◽

Room Temperature ◽

Gas Sensing ◽

2D Materials ◽

High Sensitivity ◽

Two Dimensional ◽

No2 Gas Sensor ◽

2D Structure ◽

Sensing Application

The very diverse two-dimensional (2D) materials have bloomed in NO2 gas sensing application that provide new opportunities and challenges in function oriented gas sensors. In this work, a 2D/2D/2D structure...

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Photo-enhanced gas sensing of SnS2 with nanoscale defects

RSC Advances ◽

10.1039/c8ra08857h ◽

2019 ◽

Vol 9 (2) ◽

pp. 626-635 ◽

Cited By ~ 11

Author(s):

Wen-Jie Yan ◽

Deng-Yun Chen ◽

Huei-Ru Fuh ◽

Ying-Lan Li ◽

Duan Zhang ◽

...

Keyword(s):

Gas Sensor ◽

Room Temperature ◽

Gas Sensing ◽

High Sensitivity

A photon assisted SnS2-based gas sensor with an ultra-high sensitivity of 3 ppb NO2 has been achieved at room temperature.

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A p-n Heterojunction Based Pd/PdO@ZnO Organic Frameworks for High-Sensitivity Room-Temperature Formaldehyde Gas Sensor

Frontiers in Chemistry ◽

10.3389/fchem.2021.742488 ◽

2021 ◽

Vol 9 ◽

Author(s):

Faheem Ullah Khan ◽

Shahid Mehmood ◽

Shiliang Liu ◽

Wei Xu ◽

Muhammad Naeem Shah ◽

...

Keyword(s):

Gas Sensor ◽

Room Temperature ◽

Gas Sensing ◽

Metal Organic Framework ◽

Organic Pollutant ◽

High Surface ◽

High Surface Area ◽

High Sensitivity ◽

Zno Nanomaterials ◽

Sensing Performance

As formaldehyde is an extremely toxic volatile organic pollutant, a highly sensitive and selective gas sensor for low-concentration formaldehyde monitoring is of great importance. Herein, metal-organic framework (MOF) derived Pd/PdO@ZnO porous nanostructures were synthesized through hydrothermal method followed by calcination processes. Specifically, porous Pd/PdO@ZnO nanomaterials with large surfaces were synthesized using MOFs as sacrificial templates. During the calcination procedure, an optimized temperature of 500°C was used to form a stable structure. More importantly, intensive PdO@ZnO inside the material and composite interface provides lots of p-n heterojunction to efficiently manipulate room temperature sensing performance. As the height of the energy barrier at the junction of PdO@ZnO exponentially influences the sensor resistance, the Pd/PdO@ZnO nanomaterials exhibit high sensitivity (38.57% for 100 ppm) at room temperature for 1-ppm formaldehyde with satisfactory selectivity towards (ammonia, acetone, methanol, and IPA). Besides, due to the catalytic effect of Pd and PdO, the adsorption and desorption of the gas molecules are accelerated, and the response and recovery time is as small as 256 and 264 s, respectively. Therefore, this MOF-driven strategy can prepare metal oxide composites with high surface area, well-defined morphology, and satisfactory room-temperature formaldehyde gas sensing performance for indoor air quality control.

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Fabricating ZnO Nanorods Sensor for Chemical Gas Detection at Room Temperature

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.864 ◽

2007 ◽

Vol 7 (12) ◽

pp. 4439-4442 ◽

Cited By ~ 17

Author(s):

Chuanwei Cheng ◽

Guoyue Xu ◽

Haiqian Zhang ◽

Yan Luo

Keyword(s):

Gas Sensors ◽

Potential Application ◽

Room Temperature ◽

Gas Sensing ◽

Zno Nanorods ◽

High Sensitivity ◽

Gas Detection ◽

Highly Sensitive ◽

Sensing Characteristics

We present a sensor fabricated by simply casting ZnO nanorods on a microelectrodes array for chemical gas detection at room temperature. The ammonia and ethanol gas sensing characteristics were carefully investigated. The sensor exhibited high sensitivity for both ammonia and ethanol gases. The response and recover time are less than 20 seconds, respectively. Present results demonstrate the potential application of ZnO nanorods for fabricating highly sensitive gas sensors.

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Gold and ZnO-Based Metal-Semiconductor Network for Highly Sensitive Room-Temperature Gas Sensing

Sensors ◽

10.3390/s19183815 ◽

2019 ◽

Vol 19 (18) ◽

pp. 3815

Author(s):

Renyun Zhang ◽

Magnus Hummelgård ◽

Joel Ljunggren ◽

Håkan Olin

Keyword(s):

Solar Cells ◽

Gas Sensor ◽

Network Structure ◽

Room Temperature ◽

Gas Sensing ◽

Zno Nanowires ◽

Gold Particles ◽

Highly Sensitive ◽

Semiconductor Electronics ◽

New Type

Metal-semiconductor junctions and interfaces have been studied for many years due to their importance in applications such as semiconductor electronics and solar cells. However, semiconductor-metal networks are less studied because there is a lack of effective methods to fabricate such structures. Here, we report a novel Au–ZnO-based metal-semiconductor (M-S)n network in which ZnO nanowires were grown horizontally on gold particles and extended to reach the neighboring particles, forming an (M-S)n network. The (M-S)n network was further used as a gas sensor for sensing ethanol and acetone gases. The results show that the (M-S)n network is sensitive to ethanol (28.1 ppm) and acetone (22.3 ppm) gases and has the capacity to recognize the two gases based on differences in the saturation time. This study provides a method for producing a new type of metal-semiconductor network structure and demonstrates its application in gas sensing.

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Enhancing room-temperature NO2 gas sensing performance based on a metal phthalocyanine/graphene quantum dot hybrid material

RSC Advances ◽

10.1039/d0ra10310a ◽

2021 ◽

Vol 11 (10) ◽

pp. 5618-5628

Author(s):

Wenkai Jiang ◽

Xinwei Chen ◽

Tao Wang ◽

Bolong Li ◽

Min Zeng ◽

...

Keyword(s):

Quantum Dot ◽

Gas Sensor ◽

Hybrid Material ◽

High Performance ◽

Room Temperature ◽

Gas Sensing ◽

Metal Phthalocyanine ◽

Graphene Quantum Dot ◽

Sensing Performance

A high performance gas sensor based on a metal phthalocyanine/graphene quantum dot hybrid material was fabricated for NO2 detection at room-temperature.

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A Self-Powered Nanogenerator for the Electrical Protection of Integrated Circuits from Trace Amounts of Liquid

Nano-Micro Letters ◽

10.1007/s40820-019-0338-1 ◽

2019 ◽

Vol 12 (1) ◽

Cited By ~ 3

Author(s):

Zhuang Hui ◽

Ming Xiao ◽

Daozhi Shen ◽

Jiayun Feng ◽

Peng Peng ◽

...

Keyword(s):

Integrated Circuits ◽

High Performance ◽

Printed Circuit Board ◽

Short Circuit ◽

High Sensitivity ◽

Short Circuit Current ◽

Fast Response ◽

Open Circuit ◽

Circuit Board ◽

Self Powered

Abstract With the increase in the use of electronic devices in many different environments, a need has arisen for an easily implemented method for the rapid, sensitive detection of liquids in the vicinity of electronic components. In this work, a high-performance power generator that combines carbon nanoparticles and TiO2 nanowires has been fabricated by sequential electrophoretic deposition (EPD). The open-circuit voltage and short-circuit current of a single generator are found to exceed 0.7 V and 100 μA when 6 μL of water was applied. The generator is also found to have a stable and reproducible response to other liquids. An output voltage of 0.3 V was obtained after 244, 876, 931, and 184 μs, on exposure of the generator to 6 μL of water, ethanol, acetone, and methanol, respectively. The fast response time and high sensitivity to liquids show that the device has great potential for the detection of small quantities of liquid. In addition, the simple easily implemented sequential EPD method ensures the high mechanical strength of the device. This compact, reliable device provides a new method for the sensitive, rapid detection of extraneous liquids before they can impact the performance of electronic circuits, particularly those on printed circuit board.

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