Synthesized of Highly Sensitive Tin (IV)-Doped Zinc Oxide Humidity Sensor

2015 ◽  
Vol 1109 ◽  
pp. 559-563
Author(s):  
Ahmad Syakirin Ismail ◽  
Mohd Firdaus Malek ◽  
Muhammad Amir Ridhwan Abdullah ◽  
Mohamad Hafiz Mamat ◽  
M. Rusop
Keyword(s):  
Zinc Oxide ◽  
Recovery Time ◽  
Humidity Sensor ◽  
Sol Gel ◽  
High Sensitivity ◽  
Average Diameter ◽  
Undoped Sample ◽  
Immersion Method ◽  
Response Recovery ◽  
Highly Sensitive

High sensitivity Tin (IV) (Sn) - doped zinc oxide (ZnO) humidity sensor was deposited using sol-gel immersion method. The Sn-doped sample was deposited on glass substrate and undoped sample was also prepared to seem the improvement made through doping process. The analyses showed that the sensor’s morphology has become more porous and having lower average diameter of nanorods, high conductivity and higher response, recovery time, and sensitivity. The sensitivity of the sensor increased from 2 to 4 by doping with Sn.

scholarly journals Performance of the highly sensitive humidity sensor constructed with nanofibrillated cellulose/graphene oxide/polydimethylsiloxane aerogel via freeze drying

RSC Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 1543-1552
Author(s):  
Yutong Yang ◽  
Guoting Su ◽  
Qilin Li ◽  
Zipiao Zhu ◽  
Shaoran Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Freeze Drying ◽  
Humidity Sensor ◽  
High Sensitivity ◽  
Nanofibrillated Cellulose ◽  
Rapid Response ◽  
Response Recovery ◽  
Highly Sensitive ◽  
Recovery Behavior

This work presents a nanocellulose-based humidity sensor with high sensitivity, remarkable reproducibility and rapid response/recovery behavior fabricated via freeze drying.

scholarly journals High-Performance Humidity Sensor Based on the Graphene Flower/Zinc Oxide Composite

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 242
Author(s):  
Muhammad Saqib ◽  
Shenawar Ali Khan ◽  
Hafiz Mohammad Mutee Ur Rehman ◽  
Yunsook Yang ◽  
Seongwan Kim ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
High Performance ◽  
Humidity Sensor ◽  
Electronic Device ◽  
Sol Gel ◽  
Functional Materials ◽  
Cost Effective ◽  
Functional Material ◽  
Functional Layer ◽  
Highly Sensitive

Performance of an electronic device relies heavily on the availability of a suitable functional material. One of the simple, easy, and cost-effective ways to obtain novel functional materials with improved properties for desired applications is to make composites of selected materials. In this work, a novel composite of transparent n-type zinc oxide (ZnO) with a wide bandgap and a unique structure of graphene in the form of a graphene flower (GrF) is synthesized and used as the functional layer of a humidity sensor. The (GrF/ZnO) composite was synthesized by a simple sol–gel method. Morphological, elemental, and structural characterizations of GrF/ZnO composite were performed by a field emission scanning electron microscope (FESEM), energy-dispersive spectroscopy (EDS), and an x-ray diffractometer (XRD), respectively, to fully understand the properties of this newly synthesized functional material. The proposed humidity sensor was tested in the relative humidity (RH) range of 15% RH% to 86% RH%. The demonstrated sensor illustrated a highly sensitive response to humidity with an average current change of 7.77 μA/RH%. Other prominent characteristics shown by this device include but were not limited to high stability, repeatable results, fast response, and quick recovery time. The proposed humidity sensor was highly sensitive to human breathing, thus making it a promising candidate for various applications related to health monitoring.

The effect of graphene and cobalt on ethanol sensing performance of ZnO based sensor prepared by sol–gel method

2021 ◽  
Author(s):  
Sadaf Nejatinia ◽  
Sara Khadem Charvadeh ◽  
Abbas Bagheri Khatibani
Keyword(s):  
Zinc Oxide ◽  
Recovery Time ◽  
Sol Gel ◽  
Electric Circuit ◽  
Lattice Parameter ◽  
Pure Zinc ◽  
Gel Method ◽  
Sol Gel Method ◽  
Response Recovery ◽  
Best Response

Abstract The sol gel method was used to synthesize pure zinc oxide, graphene doped zinc oxide, cobalt doped zinc oxide and graphene/cobalt doped zinc oxide samples to investigate their sensing properties. Different physical properties of the samples have been investigated and compared through X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and Fourier transform infrared spectroscopy (FTIR). Using the XRD results, the lattice parameter increased with doping of the samples. Based on the analyses, the formation of zinc oxide in all samples and the related signs of graphene and cobalt were approved. By the aid of an electric circuit, all of the samples were exposed to different concentrations of ethanol. The best response/recovery time was reported for all samples at 3000 ppm. Doping of the samples had a significant effect on reducing the response/recovery time and increasing the sensitivity, which is a significant case for semiconductor gas sensors.

Synthesis of CuO–CdS composite nanowires and their ultrasensitive ethanol sensing properties

2019 ◽  
Vol 6 (1) ◽  
pp. 238-247 ◽  
Author(s):  
Nan Zhang ◽  
Xiaohui Ma ◽  
Yanyang Yin ◽  
Yu Chen ◽  
Chuannan Li ◽  
...  
Keyword(s):  
Recovery Time ◽  
Solvothermal Method ◽  
Operating Temperature ◽  
Average Diameter ◽  
One Dimension ◽  
Sensing Properties ◽  
Response Recovery ◽  
Ethanol Sensing

One dimension CuO/CdS composites with an average diameter of 30 nm were synthesized by a solvothermal method. The operating temperature of the sensors is 182 °C, and their responses were improved by 6 times. The ultrafast response–recovery time was obtained.

A highly sensitive humidity sensor based on an aggregation-induced emission luminogen-appended hygroscopic polymer microresonator

2021 ◽  
Author(s):  
Airong Qiagedeer ◽  
Hiroshi Yamagishi ◽  
Minami Sakamoto ◽  
Hanako Hasebe ◽  
Fumitaka Ishiwari ◽  
...  
Keyword(s):  
Humidity Sensor ◽  
High Sensitivity ◽  
Aggregation Induced Emission ◽  
Highly Sensitive ◽  
Self Assembled

A self-assembled microsphere resonator, comprising a hygroscopic polymer with aggregation-induced emission luminogen pendants, can sense humidity with high sensitivity and repeatability.

Controllable Growth of Vertically Aligned Aluminum-Doped Zinc Oxide Nanorod Arrays by Sonicated Sol–Gel Immersion Method depending on Precursor Solution Volumes

2011 ◽  
Vol 50 (6S) ◽  
pp. 06GH04 ◽  
Author(s):  
Mohamad Hafiz Mamat ◽  
Zuraida Khusaimi ◽  
Musa Mohamed Zahidi ◽  
Suriani Abu Bakar ◽  
Yosri Mohd Siran ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Sol Gel ◽  
Precursor Solution ◽  
Nanorod Arrays ◽  
Immersion Method ◽  
Aluminum Doped Zinc Oxide ◽  
Controllable Growth ◽  
Vertically Aligned

Nanostructured Zinc Oxide Thin Film Based Humidity Sensor Prepared by Sol-Gel Immersion Technique

2013 ◽  
Vol 667 ◽  
pp. 553-557 ◽  
Author(s):  
M. Awalludin ◽  
Mohamad Hafiz Mamat ◽  
Mohd Zainizan Sahdan ◽  
Z. Mohamad ◽  
Mohamad Rusop
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
Immersion Time ◽  
Humidity Sensor ◽  
Sol Gel ◽  
Oxide Thin Film ◽  
Nanostructured Zinc Oxide ◽  
Time Scanning ◽  
Immersion Technique ◽  
Intensity Increment

This paper focus on nanostructured Zinc Oxide (ZnO) thin film based humidity sensor prepared using sol-gel method immersion technique at different immersion time. Scanning Electron Microscopy (SEM) investigations reveal nanorods ZnO were deposited on glass substrate with nanorods length increased with immersion time. All fabricated sensors show current intensity increment response when relative humidity is increased. Sensor fabricated at 16 hr immersion time shows the highest sensitivity in this study.

Zinc Oxide Nanorods Characteristics Prepared by Sol-Gel Immersion Method Immersed at Different Times

2013 ◽  
Vol 667 ◽  
pp. 375-379 ◽  
Author(s):  
M. Awalludin ◽  
Mohamad Hafiz Mamat ◽  
Mohd Zainizan Sahdan ◽  
Z. Mohamad ◽  
Mohamad Rusop
Keyword(s):  
Electron Microscopy ◽  
Zinc Oxide ◽  
Immersion Time ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Immersion Method ◽  
X Ray ◽  
Oxide Nanorods ◽  
Scanning Electron

This paper focus on zinc oxide (ZnO) nanorods prepared using sol-gel immersion method immersed at different time. Immersion times have been varied 1~24 hr and the characteristics of each sample have been observed. The effects of immersion time on ZnO nanorods thin films have been studied in surface morphology and structural properties using Scanning Electron Microscopy (SEM) and X-ray diffractometer (XRD), respectively.

Structural Properties of Sn-Doped ZnO Thin Films Deposited on Glass Substrate Using Sol-Gel Immersion Method

2015 ◽  
Vol 1109 ◽  
pp. 568-571
Author(s):  
Shafura Karim ◽  
Uzer Mohd Noor ◽  
M.H. Mamat ◽  
Shuhaimi Abu Bakar ◽  
Salman A.H. Alrokayan ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Scanning Electron Microscopy ◽  
Zinc Oxide ◽  
Glass Substrate ◽  
Sol Gel ◽  
Zno Thin Films ◽  
Immersion Method ◽  
Doped Zno ◽  
Scanning Electron

Tin-doped Zinc Oxide (Sn-doped ZnO) thin films were prepared using zinc acetate dehydrate as a starting material by sol-gel immersion method. The doping concentrations were varied at 0 at.%, 1.0 at.%, 2.0 at.% and 3.0 at.%. The synthesized samples were characterized by Field Emission Scanning Electron Microscopy (FESEM).

Performance of Ultraviolet Photoconductive Sensor Based on Aluminium-Doped Zinc Oxide Nanorod-Nanoflake Network Thin Film Using Aluminium Contacts

2013 ◽  
Vol 832 ◽  
pp. 298-302 ◽  
Author(s):  
M.H. Mamat ◽  
Nor Diyana Md Sin ◽  
I. Saurdi ◽  
N.N. Hafizah ◽  
Mohd Firdaus Malek ◽  
...  
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
Seed Layer ◽  
Uv Light ◽  
Sol Gel ◽  
Zno Nanorod ◽  
Immersion Method ◽  
Coated Glass Substrate ◽  
Sensor Applications ◽  
Doped Zno

In this research, we fabricated UV photoconductive sensor using aluminium (Al)-doped ZnO nanorod-nanoflake network thin film. These nanostructures were deposited on the seed-layer-coated glass substrate using sonicated sol-gel immersion method. By using Al contacts, it was found that the performance of the UV photoconductive sensor is very good. The responsivity of the device was 46.4 mA/W with sensitivity of 17.5 under 365-nm UV light (5 mW/cm2) at bias voltage of 10 V. Our study revealed that these nanostructures are very promising material for the UV photoconductive sensor applications.

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