Recent Trends in Graphene Oxide-Enabled Nanocomposites for Sensing Applications

Humidity sensors are of utmost importance in certain areas of life, in processing industries, in fabrication laboratories and in agriculture. Precise evaluation of humidity percentage in air is the need of various applications. Graphene and its composites have shown great potential in performing as humidity sensors owing to enormous surface area, very low electrical noise, high electrical conductivity, mechanical and thermal stability and high room temperature mobility. There is no such extensive review on graphene-based devices for humidity sensing applications. This review extensively discusses graphene-based devices intended towards sensing humidity, starting from the methods of synthesizing graphene, its electronic and mechanical properties favoring sensing behavior and different types of sensing mechanisms. The review also studies the performance and recent trends in humidity sensor based on graphene, graphene quantum dots, graphene oxide, reduced graphene oxide and various composite materials based on graphene such as graphene/polymer, graphene/metal oxide or graphene/metal. Discussions on the limitations and challenges of the graphene-based humidity sensors along with its future trends are made.

Download Full-text

X-ray Photoelectron Spectroscopy Analysis of Chitosan–Graphene Oxide-Based Composite Thin Films for Potential Optical Sensing Applications

Polymers ◽

10.3390/polym13030478 ◽

2021 ◽

Vol 13 (3) ◽

pp. 478

Author(s):

Wan Mohd Ebtisyam Mustaqim Mohd Daniyal ◽

Yap Wing Fen ◽

Silvan Saleviter ◽

Narong Chanlek ◽

Hideki Nakajima ◽

...

Keyword(s):

Thin Film ◽

Thin Films ◽

Graphene Oxide ◽

Photoelectron Spectroscopy ◽

Functional Group ◽

Optical Sensing ◽

Composite Thin Films ◽

Cobalt Ions ◽

X Ray ◽

Sensing Applications

In this study, X-ray photoelectron spectroscopy (XPS) was used to study chitosan–graphene oxide (chitosan–GO) incorporated with 4-(2-pyridylazo)resorcinol (PAR) and cadmium sulfide quantum dot (CdS QD) composite thin films for the potential optical sensing of cobalt ions (Co2+). From the XPS results, it was confirmed that carbon, oxygen, and nitrogen elements existed on the PAR–chitosan–GO thin film, while for CdS QD–chitosan–GO, the existence of carbon, oxygen, cadmium, nitrogen, and sulfur were confirmed. Further deconvolution of each element using the Gaussian–Lorentzian curve fitting program revealed the sub-peak component of each element and hence the corresponding functional group was identified. Next, investigation using surface plasmon resonance (SPR) optical sensor proved that both chitosan–GO-based thin films were able to detect Co2+ as low as 0.01 ppm for both composite thin films, while the PAR had the higher binding affinity. The interaction of the Co2+ with the thin films was characterized again using XPS to confirm the functional group involved during the reaction. The XPS results proved that primary amino in the PAR–chitosan–GO thin film contributed more important role for the reaction with Co2+, as in agreement with the SPR results.

Download Full-text

Potentiometric Taste Sensing Using Reduced Graphene Oxide Screen Printed Electrodes

Sensor Letters ◽

10.1166/sl.2020.4302 ◽

2020 ◽

Vol 18 (12) ◽

pp. 881-888

Author(s):

Anil B. Patil ◽

Umesh. J. Tupe ◽

Vikas V. Deshmane ◽

Arun V. Patil

Keyword(s):

Graphene Oxide ◽

Reduced Graphene Oxide ◽

Principal Component ◽

Experimental Results ◽

Statistical Tool ◽

Sensing Applications ◽

Screen Printed Electrodes ◽

Reduced Graphene ◽

Pharmaceutical Industries ◽

Screen Printed

This paper reports the development of simple and economical reduced graphene oxide (rGO) based screen-printed electrodes (SPE) for five basic taste sensing applications. Twenty different test solutions for the five tastes of salty, sour, sweet, umami, and bitter at 1 ppm, 10 ppm, 100 ppm, 1000 ppm concentration levels were tested with the fabricated SPEs. From experimental results, electrical signals generated between the electrode and test solution interface were measured using the potentiometric method. Satisfactory potentiometric responses of SPEs to different ppm concentrations for each sample were used to analyze the sample data. Histogram using the statistical tool was used to analyze the changes in the conductivity response. A multivariate Principal Component Analysis (PCA) statistical tool correlated using loading plots between variables and factors of all the five basic tastes. The plot showed the interrelation between variables and test samples. The obtained experimental results from these rGO based SPEs make them suitable for their use in taste sensing applications such as for any taste disorder disability, food-producing industry, pharmaceutical industries, etc.

Download Full-text

A novel method of electrochemically growing ZnO nanorods on graphene oxide as substrate for gas sensing applications

Materials Research Express ◽

10.1088/2053-1591/ab16f8 ◽

2019 ◽

Vol 6 (7) ◽

pp. 075039 ◽

Cited By ~ 1

Author(s):

Shani Kumar ◽

A Garg ◽

A Chowdhuri ◽

A Jain ◽

A Kapoor

Keyword(s):

Graphene Oxide ◽

Gas Sensing ◽

Zno Nanorods ◽

Sensing Applications ◽

Novel Method

Download Full-text

Recent trends in the synthesis of graphene and graphene oxide based nanomaterials for removal of heavy metals — A review

Journal of Industrial and Engineering Chemistry ◽

10.1016/j.jiec.2018.05.028 ◽

2018 ◽

Vol 66 ◽

pp. 29-44 ◽

Cited By ~ 93

Author(s):

Jihn Yih Lim ◽

N.M. Mubarak ◽

E.C. Abdullah ◽

Sabzoi Nizamuddin ◽

Mohammad Khalid ◽

...

Keyword(s):

Heavy Metals ◽

Graphene Oxide ◽

Removal Of Heavy Metals ◽

Recent Trends

Download Full-text

Carbon-Based Nanomaterials for Drugs Sensing: A Review

Materials Science Forum ◽

10.4028/www.scientific.net/msf.807.13 ◽

2014 ◽

Vol 807 ◽

pp. 13-39

Author(s):

Bavani Kasinathan ◽

Ruzniza Mohd Zawawi

Keyword(s):

Carbon Nanotubes ◽

Graphene Oxide ◽

Carbon Nanofibers ◽

Chemical Vapour Deposition ◽

Vapour Deposition ◽

Chemical Vapour ◽

Sensing Applications ◽

Carbon Based Nanomaterials ◽

Walled Carbon Nanotubes ◽

Carbon Based

Carbon-based nanomaterials such as graphene, carbon nanotubes, carbon nanofibers and nanodiamonds have been fascinated considerable attention as promising materials for drug sensing. These materials have tremendous amount of attraction due to some extraordinary features such as excellent electrical and thermal conductivities as well as high mechanical strength. Hence, these nanomaterials have been used extensively in sensor technology in order to achieved desired sensitivities. To date, carbon based nanomaterials have been exploit in the development of various drug sensing due to their simple preparation methods, and cost effectiveness. The aim of this review is to focus upon carbon based nanomaterials predominantly on drugs sensing applications. This review has been written in summary form including properties, fabrication method, and analytical performances.Abbreviation:Au, Gold; CNFs, Carbon Nanofibers; CNTs, Carbon Nanotubes; CVD, Chemical Vapour Deposition; D-, Dextrorotatory enantiomer; D, Dimensional; DNase, deoxyribonuclease; ESD, Electrospinning deposition; GCE, Glassy Carbon Electrode; Gr, Graphene; GrO, Graphene Oxide; ILs, ionic liquids; L-, Levorotatory enantiomer; LOD, Limit of Detection; MTase, Methyltransferases; MW, Microwave; MWCNTs, Multi-walled Carbon nanotubes; NDs, Nanodiamonds; NPs, Nanoparticles; PECVD, Plasma Enhanced Chemical Vapour Deposition; RGO, Reduced Graphene Oxide; SPE, Screen-Printed Electrode; SPR, Surface Plasmon resonance; ssDNA, single-stranded DNA; SWCNTs, Single-walled Carbon nanotubes.

Download Full-text