α-Fe2O3 loaded rGO nanosheets based fast response/recovery CO gas sensor at room temperature

Basu, Aviru Kumar; Chauhan, Pankaj Singh; Awasthi, Mohit; Bhattacharya, Shantanu

doi:10.1016/j.apsusc.2018.09.123

Cited by 106 publications

(47 citation statements)

References 48 publications

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“…In Table 2, the percentage content of C1s (chemical states) is shown for rGO-MWCNT-PLL nanocomposite. In our previously reported article 26 the percentage of C-O is higher (33.90), in graphene oxide compared to rGO-MWCNT-PLL nanocomposite due to the presence of epoxy, alkoxy, carbonyl and carboxyl groups on the surface of graphene oxide. The percentage content of C-C is more in rGO-MWCNT-PLL nanocomposite, but in rest of the bonds it has decreased compared to GO 26 .…”

Section: Resultsmentioning

confidence: 65%

“…In our previously reported article 26 the percentage of C-O is higher (33.90), in graphene oxide compared to rGO-MWCNT-PLL nanocomposite due to the presence of epoxy, alkoxy, carbonyl and carboxyl groups on the surface of graphene oxide. The percentage content of C-C is more in rGO-MWCNT-PLL nanocomposite, but in rest of the bonds it has decreased compared to GO 26 . This changes in the nanocomposite confirms the formation of our product, by reduction of GO to rGO and decrease of the carboxyl and epoxy groups.…”

Section: Resultsmentioning

confidence: 65%

“…This is more so as there is a removal of the oxygen groups i.e. deoxygenation has occurred due to the decrease of carboxyl, epoxy and alkoxy groups 26 . Additionally, there are two distinct absorbance peaks which can be seen at 285.23 and 287.6 eV respectively due to the bond formation process which corresponds to the carbon in the C-NH 2 and C-N bonds, respectively (Fig.…”

Section: Resultsmentioning

confidence: 99%

“…The crystalline structure of the as obtained GO was characterized using XRD (M/S Panalytical Xpert ProMPD system) with a Cu target (λ = 1.540598 Å) and a scan rate of 3°/min as reported in our earlier work 26 . Raman spectroscopy was also done for the GO and the rGO composite film.…”

Section: Methodsmentioning

confidence: 99%

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Poly-L-Lysine functionalised MWCNT-rGO nanosheets based 3-d hybrid structure for femtomolar level cholesterol detection using cantilever based sensing platform

Basu

Sah

Pradhan

et al. 2019

Sci Rep

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In this work we have developed a novel rGO-MWCNT (reduced graphene oxide-multiwalled carbon nanotube) nanocomposite material with Poly-L-Lysine functionalization which can be used for detection of biomolecules with enhanced sensitivity. The reduced GO sheets are found to play a major role as a connector and helps in the assembly of bundles of carbon nanotubes (CNTs) which may sometime play a role of upstanding nanostructures. The overall composite structure is further fully functionalized resulting in an overall high density of amino groups that can be used to capture biomolecules. The sensitivity of the as synthesized film is tested by the oxidation of cholesterol through cholesterol oxidase enzyme that is biochemically immobilized over these composite films. The test for the immobilization density of the novel films are carried out by mounting these films on sensitive thin section static micro/nano-cantilever platforms. The platforms have capability to measure cholesterol traces in blood upto an extent of 100 femto molar through deflection /bending of the cantilevers due to surface reaction. The films developed show a promise of high immobilization density which is further confirmed through fluorescence studies using FITC labeling of functionalized MWCNT-PLL and rGO-PLL films respectively.

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Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Poly-L-Lysine functionalised MWCNT-rGO nanosheets based 3-d hybrid structure for femtomolar level cholesterol detection using cantilever based sensing platform

Basu

Sah

Pradhan

et al. 2019

Sci Rep

Self Cite

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“…To monitor the toxic gas, a gas sensor is imperative due to concerns for industry safety requirements. With this in mind, metal oxide (SnO 2 , WO 3 , In 2 O 3 , ZnO, Fe 2 O 3 , and TiO 2 )-based gas sensors were intensively investigated for detecting hazardous gases (CO and H 2 S) and identifying their mechanism [3,4,5,6,7,8,9]. For example, the core mechanism of detecting H 2 S gas with a CuO/ZnO hybrid is destroying the p–n junction with the formation of metallic CuS in the presence of H 2 S gas [10].…”

Section: Introductionmentioning

confidence: 99%

Cu/CuO@ZnO Hollow Nanofiber Gas Sensor: Effect of Hollow Nanofiber Structure and P–N Junction on Operating Temperature and Sensitivity

Hwang

Kim

Hong

et al. 2019

Sensors

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For the fast and easy detection of carbon monoxide (CO) gas, it was necessary to develop a CO gas sensor to operate in low temperatures. Herein, a novel Cu/CuO-decorated ZnO hollow nanofiber was prepared with the electrospinning, calcination, and photodeposition methods. In the presence of 100 ppm CO gas, the Cu/CuO-photodeposited ZnO hollow nanofiber (Cu/CuO@ZnO HNF) showed twice higher sensitivity than that of pure ZnO nanofiber at a relatively low working temperature of 300 °C. The hollow structure and p–n junction between Cu/CuO and ZnO would be considered to contribute to the enhancement of sensitivity to CO gas at 300 °C due to the improved specific surface area and efficient electron transfer.

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Resistive Sensors for Continuous Monitoring of Air Pollution

Gorthala,

Kulkarni,

Ghosh

2023

Organic and Inorganic Materials Based Sensors

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α-Fe2O3 loaded rGO nanosheets based fast response/recovery CO gas sensor at room temperature

Cited by 106 publications

References 48 publications

Poly-L-Lysine functionalised MWCNT-rGO nanosheets based 3-d hybrid structure for femtomolar level cholesterol detection using cantilever based sensing platform

Poly-L-Lysine functionalised MWCNT-rGO nanosheets based 3-d hybrid structure for femtomolar level cholesterol detection using cantilever based sensing platform

Cu/CuO@ZnO Hollow Nanofiber Gas Sensor: Effect of Hollow Nanofiber Structure and P–N Junction on Operating Temperature and Sensitivity

Resistive Sensors for Continuous Monitoring of Air Pollution

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