Silicon nanowires/reduced graphene oxide nanocomposite based novel sensor platform for detection of cyclohexane and formaldehyde

Gautam, Varsha; Kumar, Avshish; Kumar, Ramesh; Jain, V. K.; Nagpal, Suman

doi:10.1016/j.mssp.2020.105571

Cited by 27 publications

(15 citation statements)

References 23 publications

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“…Remarkably, in a more recent study, an array of nylon fibers wrapped with SWCNTs, MWCNTs, and ZnO QDs-SWCNTs has been developed as a flexible wearable sensor to be incorporated in face masks. Detection and effective discrimination of NH 3 , ethanol, and formaldehyde [ 105 ], and common disease biomarkers (ethanol [ 101 ], formaldehyde [ 106 ], NH 3 [ 7 ]) was achieved [ 7 ]. SWCNTs-functionalization with semiconducting organic polymers, monomers or oligomers is also reported, especially for real-world sample experiments, discriminating successfully COPD patients from HC as well as selected analytes; however, larger clinical trials remain to be conducted ( Table 2 ) [ 107 ].…”

Section: Types Of Nanomaterial-based Sensors In Breath Analysismentioning

confidence: 99%

“…Notably, electrochemical sensors are conventionally constrained in detecting electrically inert simple aromatic compounds and hydrocarbons, since the target analyte should be electrochemically active [ 51 ]. More recently, the detection of cyclohexane along with formaldehyde, has been reported using a Si NW-rGO sensing film, due to cyclohexane-oxidation catalysis by rGO [ 106 ].…”

Section: Types Of Nanomaterial-based Sensors In Breath Analysismentioning

confidence: 99%

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Breath Analysis: A Promising Tool for Disease Diagnosis—The Role of Sensors

Kaloumenou

Skotadis

Lаgopati

et al. 2022

Sensors

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Early-stage disease diagnosis is of particular importance for effective patient identification as well as their treatment. Lack of patient compliance for the existing diagnostic methods, however, limits prompt diagnosis, rendering the development of non-invasive diagnostic tools mandatory. One of the most promising non-invasive diagnostic methods that has also attracted great research interest during the last years is breath analysis; the method detects gas-analytes such as exhaled volatile organic compounds (VOCs) and inorganic gases that are considered to be important biomarkers for various disease-types. The diagnostic ability of gas-pattern detection using analytical techniques and especially sensors has been widely discussed in the literature; however, the incorporation of novel nanomaterials in sensor-development has also proved to enhance sensor performance, for both selective and cross-reactive applications. The aim of the first part of this review is to provide an up-to-date overview of the main categories of sensors studied for disease diagnosis applications via the detection of exhaled gas-analytes and to highlight the role of nanomaterials. The second and most novel part of this review concentrates on the remarkable applicability of breath analysis in differential diagnosis, phenotyping, and the staging of several disease-types, which are currently amongst the most pressing challenges in the field.

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Section: Types Of Nanomaterial-based Sensors In Breath Analysismentioning

confidence: 99%

Section: Types Of Nanomaterial-based Sensors In Breath Analysismentioning

confidence: 99%

Breath Analysis: A Promising Tool for Disease Diagnosis—The Role of Sensors

Kaloumenou

Skotadis

Lаgopati

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…Other recent sustainable approaches for the preparation of sensors for formaldehyde detection include the use of largely available and inexpensive materials such as tin and zinc [ 121 , 122 , 123 , 124 , 125 , 126 , 127 , 128 ], the second most abundant element in the Earth’s crusts, i.e., silicon [ 129 , 130 ], the use of biomass-derived materials, such as bacterial cellulose [ 131 ] or egg-white [ 132 ].…”

Section: Section A: Environmental Analysismentioning

confidence: 99%

Paving the Way for a Green Transition in the Design of Sensors and Biosensors for the Detection of Volatile Organic Compounds (VOCs)

et al. 2022

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The efficient and selective detection of volatile organic compounds (VOCs) provides key information for various purposes ranging from the toxicological analysis of indoor/outdoor environments to the diagnosis of diseases or to the investigation of biological processes. In the last decade, different sensors and biosensors providing reliable, rapid, and economic responses in the detection of VOCs have been successfully conceived and applied in numerous practical cases; however, the global necessity of a sustainable development, has driven the design of devices for the detection of VOCs to greener methods. In this review, the most recent and innovative VOC sensors and biosensors with sustainable features are presented. The sensors are grouped into three of the main industrial sectors of daily life, including environmental analysis, highly important for toxicity issues, food packaging tools, especially aimed at avoiding the spoilage of meat and fish, and the diagnosis of diseases, crucial for the early detection of relevant pathological conditions such as cancer and diabetes. The research outcomes presented in the review underly the necessity of preparing sensors with higher efficiency, lower detection limits, improved selectivity, and enhanced sustainable characteristics to fully address the sustainable manufacturing of VOC sensors and biosensors.

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“…Тому є потреба у розробці портативних сенсорів для аналізу безпеки оточуючого середовища у житлі людини чи на робочому місці. Верхня допустима межа концентрації формальдегіду, встановлена Національним інститутом безпеки та гігієни праці, становить 0,1 ppm у житловому приміщенні та 1 ppm у промисловому цеху [48]. Також HCHO -це природна молекула, яку людський організм виробляє в невеликих кількостях.…”

Section: сенсори парів формальдегідуunclassified

“…Для створення сенсорів формальдегіду використовувався кремній електронного [20], [48] та діркового [48] типу провідності з питомим опором для ~0, 005 0, 02 Ом см…”

Section: -9unclassified

Sensors Based on Nanoscale Silicon 1D Structures for Industrial, Environmental and Medical Monitoring

Linevych

Koval

2022

Microsyst., Electron. & Acoust.

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Article is devoted to the analysis of modern sensors based on silicon nanowires (SiNWs) to determine the influence of SiNWs synthesis parameters and their structural features on device characteristics. A modern trend in the development of electronic sensing devices is the use of various types of nanomaterials in order to increase sensor sensitivity and miniaturize of their size. 1D nanomaterials, namely SiNWs, have several advantages for sensor applications, such as a large surface-to-volume ratio and an increased rate of diffusion of the main charge carriers. Based on the literature analysis, an overview of modern SiNWs sensors was made. The advantages of silicon 1D structures were shown by comparison with other types of nanostructures. Also sensors were classified according to the methods of synthesis of SiNWs, sensor principle operation, kind of input value and types of applied modifiers. Silicon nanowires were most often synthesized by the method of metal-stimulated chemical etching, the advantages of which include the simplicity of implementation, low cost, and the ability to synthesize nanostructures with a high aspect ratio. The vapor-liquid-solid synthesis was also used, the advantages of which include the ability to be adapted to any technology of supplying a gas mixture with the target component and the possibility of obtaining nanowires with a diameter of 10 nm or less. According to the principle operation, the most of sensors developed on the basis of silicon nanowires are of electrical type (resistive, capacitive, electrochemical, diode or transistor type), optical sensors (fluorescent) are developed to a much lesser extent. Gas sensors (ethanol, oil vapor, formaldehyde, ammonia, nitrogen oxide, hydrogen, carbon dioxide,), liquid sensors (glucose, hydrogen peroxide, ethanol, heavy metal ions, pH), and physical values (humidity, temperature and illumination) have been developed on the basis of silicon 1D nanoscale structures. The following surface modifiers of nanowires were used to improve the performance characteristics: noble metal nanoparticles, metal-organic framework structures, carbon nanotubes, graphene, self-assembled monolayers, metal and metal oxide thin films. In particular, it was shown that the modification of the surface of the array of SiNWs with noble metals led to an increase in the sensitivity of the hydrogen sensor by 80%. Modification of formaldehyde sensor using reduced graphene oxide resulted in an improvement of sensor sensitivity by more than 2 times. The influence of SiNWs synthesis parameters on sensor performance characteristics was also determined. In particular, it was shown that increasing of SiNWs width from 20–30 nm to 500–600 nm led to an increase in the sensitivity of humidity sensor from 4.5 to 7.5%. Increasing the etching time caused the synthesis of longer nanowires, which improved the sensitivity of carbon dioxide sensors from 0.6 to 2.5%. Dependences established in this work will make it possible to develop the production technology of various types of sensors based on silicon nanowires with high sensitivity, selectivity, stability and operation speed.

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Silicon nanowires/reduced graphene oxide nanocomposite based novel sensor platform for detection of cyclohexane and formaldehyde

Cited by 27 publications

References 23 publications

Breath Analysis: A Promising Tool for Disease Diagnosis—The Role of Sensors

Breath Analysis: A Promising Tool for Disease Diagnosis—The Role of Sensors

Paving the Way for a Green Transition in the Design of Sensors and Biosensors for the Detection of Volatile Organic Compounds (VOCs)

Sensors Based on Nanoscale Silicon 1D Structures for Industrial, Environmental and Medical Monitoring

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