Oxide and Carbon Materials Based Sensors

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "E:Engineering and Technology".

Deadline for manuscript submissions: closed (20 August 2023) | Viewed by 2737

Special Issue Editor


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Guest Editor
Institute of Nanoscience and Nanotechnology, Universiti Putra Malaysia, Serdang 43400, Selangor, Malaysia
Interests: electron devices; nanotechnology; sensor technology

Special Issue Information

Dear Colleagues,

With developments in the field of artificial intelligence and the internet of things, the environment and machines have been able to establish a more real relationship with humans. Due to this, it is very important and critical to be able to obtain reliable information and data so that no mistakes are made. The use of sensors that have the ability to convert all forms of information into the form of electrical signals is one of the methods that will make this happen. Therefore, a lot of research and development to produce the sensor is taking place and it includes the use of advanced materials in the sensor development. The use of this material should also be adapted to the existing fabrication process or simply improve the process to ensure that it can be commercialized in time. Oxide materials have long been used in the sensor development and with field of nanotechnology and composites, the use of oxide has become more widespread and important in sensor. In addition, after the discovery of carbon nanotube (CNT) and graphene and the use of nano graphite has expanded research and development of the sensor. The use of new oxide and carbon-based materials has paved the way for the production of more advanced sensors to support the development of artificial intelligence and the internet of things (such as for flexible applications). Finally, the need to be in line with the Sustainable Development Goals (SDGs), that have been set by the United Nations General Assembly, by 2030 has opened a new challenge for the researchers and engineers which can be realized by the research and development in the oxide and carbon materials-based sensors

Dr. Mohd Nizar Hamidon
Guest Editor

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Keywords

  • oxide composite
  • carbon-based
  • internet of things
  • artificial intelligence and SDG

Published Papers (2 papers)

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Research

14 pages, 13288 KiB  
Article
An Amperometric Biomedical Sensor for the Determination of Homocysteine Using Gold Nanoparticles and Acetylene Black-Dihexadecyl Phosphate-Modified Glassy Carbon Electrode
by Chunnan Zhu, Jingfang Zhang, Shunrun Zhang, Chao Liu, Xiaojun Liu, Jian Jin and Dongyun Zheng
Micromachines 2023, 14(1), 198; https://doi.org/10.3390/mi14010198 - 13 Jan 2023
Cited by 3 | Viewed by 1556
Abstract
A novel nanocomposite film composed of gold nanoparticles and acetylene black–dihexadecyl phosphate was fabricated and modified on the surface of a glassy carbon electrode through a simple and controllable dropping and electropolymerization method. The nanocomposite film electrode showed a good electrocatalytic response to [...] Read more.
A novel nanocomposite film composed of gold nanoparticles and acetylene black–dihexadecyl phosphate was fabricated and modified on the surface of a glassy carbon electrode through a simple and controllable dropping and electropolymerization method. The nanocomposite film electrode showed a good electrocatalytic response to the oxidation of homocysteine and can work as an amperometric biomedical sensor for homocysteine. With the aid of scanning electron microscopy, energy dispersive X-ray technology and electrochemical impedance spectroscopy, the sensing interface was characterized, and the sensing mechanism was discussed. Under optimal conditions, the oxidation peak current of homocysteine was linearly increased with its concentration in the range of 3.0 µmol/L~1.0 mmol/L, and a sensitivity of 18 nA/(μmol/L) was obtained. Furthermore, the detection limit was determined as 0.6 µmol/L, and the response time was detected as 3 s. Applying the nanocomposite film electrode for monitoring the homocysteine in human blood serum, the results were satisfactory. Full article
(This article belongs to the Special Issue Oxide and Carbon Materials Based Sensors)
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8 pages, 3022 KiB  
Article
Study on the Deterioration Mechanism of Pb on TiO2 Oxygen Sensor
by Chao Duan, Lejun Zhang, Zhaoxi Wu, Xu Wang, Meng Meng and Maolin Zhang
Micromachines 2023, 14(1), 156; https://doi.org/10.3390/mi14010156 - 07 Jan 2023
Cited by 1 | Viewed by 880
Abstract
Previous studies have shown that the pollutants in exhaust gas can cause performance deterioration in air-fuel oxygen sensors. Although the content of Pb in fuel oil is as low as 5 mg/L, the effect of long-term Pb accumulation on TiO2 oxygen sensors [...] Read more.
Previous studies have shown that the pollutants in exhaust gas can cause performance deterioration in air-fuel oxygen sensors. Although the content of Pb in fuel oil is as low as 5 mg/L, the effect of long-term Pb accumulation on TiO2 oxygen sensors is still unclear. In this paper, the influence mechanism of Pb-containing additives in automobile exhaust gas on the response characteristics of TiO2 oxygen sensors was simulated and studied by depositing Pb-containing pollutants on the surface of a TiO2 sensitive film. It was found that the accumulation of Pb changed the surface gas adsorption state and reduced the activation energy of TiO2, thus affecting the steady-state response voltage and response speed of the TiO2-based oxygen sensor. Full article
(This article belongs to the Special Issue Oxide and Carbon Materials Based Sensors)
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