Chemical Sensors Based on Metal Oxides

Devi, K. S. Shalini; Anantharamakrishnan, Aadhav; Krishnan, Uma Maheswari; Yakhmi, Jatinder

doi:10.1002/9781119587422.ch6

Cited by 3 publications

(4 citation statements)

References 107 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The biosensor field continues to grow at pace, and the focus is not only on new target molecules but also new materials with enhanced capabilities in detection and signal transduction (Dinesh et al., 2019). Novel techniques, which do not rely on antibody‐based detection, may also be developed (Devi et al., 2020; Shalini Devi et al., 2020). There is significant interest in developing single‐step detection of pathogenic RNA and DNA in blood samples, which could be extended to circulating non‐coding RNA.…”

Section: Integrating Biomarkers With Sensorsmentioning

confidence: 99%

“…A biosensor can detect biological molecules such as proteins and nucleic acids or monitor antigen–antibody interaction, for example. To generate an easily interpretable readout, a biosensor requires an element that can detect the biomolecule of interest, which is connected to a suitable transducer, capable of converting the biochemical signal into a quantifiable readout (Sethi, 1994; Vo‐Dinh, 2008; Devi et al., 2020). POC biosensors can be used in the clinical setting or in the field to give instantaneous results, reducing the need for travel and delays in diagnosis.…”

Section: Integrating Biomarkers With Sensorsmentioning

confidence: 99%

See 1 more Smart Citation

Diagnostic circulating biomarkers to detect vision‐threatening diabetic retinopathy: Potential screening tool of the future?

Frudd

Sivaprasad

Raman

et al. 2021

Acta Ophthalmologica

View full text Add to dashboard Cite

With the increasing prevalence of diabetes in developing and developed countries, the socio‐economic burden of diabetic retinopathy (DR), the leading complication of diabetes, is growing. Diabetic retinopathy (DR) is currently one of the leading causes of blindness in working‐age adults worldwide. Robust methodologies exist to detect and monitor DR; however, these rely on specialist imaging techniques and qualified practitioners. This makes detecting and monitoring DR expensive and time‐consuming, which is particularly problematic in developing countries where many patients will be remote and have little contact with specialist medical centres. Diabetic retinopathy (DR) is largely asymptomatic until late in the pathology. Therefore, early identification and stratification of vision‐threatening DR (VTDR) is highly desirable and will ameliorate the global impact of this disease. A simple, reliable and more cost‐effective test would greatly assist in decreasing the burden of DR around the world. Here, we evaluate and review data on circulating protein biomarkers, which have been verified in the context of DR. We also discuss the challenges and developments necessary to translate these promising data into clinically useful assays, to detect VTDR, and their potential integration into simple point‐of‐care testing devices.

show abstract

Section: Integrating Biomarkers With Sensorsmentioning

confidence: 99%

Section: Integrating Biomarkers With Sensorsmentioning

confidence: 99%

Diagnostic circulating biomarkers to detect vision‐threatening diabetic retinopathy: Potential screening tool of the future?

Frudd

Sivaprasad

Raman

et al. 2021

Acta Ophthalmologica

View full text Add to dashboard Cite

show abstract

“…Cross-linked Au NPs in particular have been widely used in order to produce chemiresistors capable of detecting various environmental pollutants [17] as well as VOCs for diagnosing diseases, such as the recent COVID-19 virus [18]. Up to now, there are scarce reports regarding pesticide gas-sensors, since most efforts usually focus on the electrochemical sensing of pesticides [19]. Dimethyl-methylphosphonate (DMMP, lab simulant of the toxic agent of sarin) has been detected with a limit of detection (LOD) in the ppm range, using complicated to produce single-use sensors [20].…”

Section: Introductionmentioning

confidence: 99%

Identification of Two Commercial Pesticides by a Nanoparticle Gas-Sensing Array

Skotadis

Kanaris

Aslanidis

et al. 2021

Sensors

View full text Add to dashboard Cite

This study presents the experimental testing of a gas-sensing array, for the detection of two commercially available pesticides (i.e., Chloract 48 EC and Nimrod), towards its eventual use along a commercial smart-farming system. The array is comprised of four distinctive sensing devices based on nanoparticles, each functionalized with a different gas-absorbing polymeric layer. As discussed herein, the sensing array is able to identify as well as quantify three gas-analytes, two pesticide solutions, and relative humidity, which acts as a reference analyte. All of the evaluation experiments were conducted in close to real-life conditions; specifically, the sensors response towards the three analytes was tested in three relative humidity backgrounds while the effect of temperature was also considered. The unique response patterns generated after the exposure of the sensing-array to the two gas-analytes were analyzed using the common statistical analysis tool Principal Component Analysis (PCA). The sensing array, being compact, low-cost, and highly sensitive, can be easily integrated with pre-existing crop-monitoring solutions. Given that there are limited reports for effective pesticide gas-sensing solutions, the proposed gas-sensing technology would significantly upgrade the added-value of the integrated system, providing it with unique advantages.

show abstract

“…Despite this, owing to the increase chemical stability of CO2, there are about a few experiments in CO2 detectors that can function at ambient temperature. In contrast to spectrometric CO2 gas detectors, physical CO2 gas sensors based on metal oxides have a low power consumption, convenience, and small size [29]. Gas sensors based on TiO2 nanostructured has been introduced [30].…”

mentioning

confidence: 99%

Cadmium sulfide doped with silver as CO2 gas sensor using pyrolysis technique

Al-Jarah¹,

Mohamad

Abdul-Hussein³

2022

IJEECS

View full text Add to dashboard Cite

The monitoring of CO2 in our life safety, industrial, and chemical laboratory applications make it an inspiring task. The chemical spray pyrolysis technique was used to prepare CdS/Ag thin films. The nanocrystalline cadmium sulfide thin films were doped with Silver at different doping concentrations (0%, 2%, and 4%). The morphologies, structures, and gas sensing properties of CdS/Ag films are presented. The samples were characterized using X-ray diffraction (XRD) and atomic force microscope (AFM). The XRD results show that the films are a polycrystalline composition and hexagonal type with a favoured orientation along (111) direction. The average grain size (nm) of AFM is between 75 and 55 nm. As a result, Ag doping changes the sensitivity of the samples respectively with the percentage of doping with time. The synthesis samples show controlling sensitivity and the small response of sensitivity are the key point in this study.

show abstract

Chemical Sensors Based on Metal Oxides

Cited by 3 publications

References 107 publications

Diagnostic circulating biomarkers to detect vision‐threatening diabetic retinopathy: Potential screening tool of the future?

Diagnostic circulating biomarkers to detect vision‐threatening diabetic retinopathy: Potential screening tool of the future?

Identification of Two Commercial Pesticides by a Nanoparticle Gas-Sensing Array

Cadmium sulfide doped with silver as CO2 gas sensor using pyrolysis technique

Contact Info

Product

Resources

About