Gas sensing applications of multilayer graphene grown on Co-Ni/Al2O3 substrate by chemical vapour deposition

2019 ◽  
Vol 16 (11/12) ◽  
pp. 692
Author(s):  
May Ali ◽  
Bamidele Victor Ayodele ◽  
Faizah Md Yasin ◽  
Mohd Nizar Hamidon ◽  
Suraya Abdul Rashid
2019 ◽  
Vol 2019 ◽  
pp. 1-10
Author(s):  
Ismayadi Ismail ◽  
Md Shuhazlly Mamat ◽  
Noor Lyana Adnan ◽  
Zainab Yunusa ◽  
Intan Helina Hasan

We reported the synthesis of graphenated-carbon nanotubes (G-CNTs) using a floating catalyst chemical vapour deposition (FCCVD) method and formed a bulk-cotton-like structure. The objectives of this work were to study the effect of the injection rate parameter of the carbon source on the formation of G-CNTs and CNTs and later to test them as an ammonia gas sensor. Ethanol, thiophene, and ferrocene were mixed and injected into FCCVD at 1150°C. The as-synthesized samples were then characterized using FESEM, HRTEM, TGA, Raman spectroscopy, XPS, and electrical conductivity measurement. We found that the injection rate of 5 ml/h was suitable for the formation of G-CNTs and a higher injection rate resulted in the formation of CNTs. Our measurement showed that the electrical conductivity response of G-CNTs was higher compared to that of CNTs. The gas-sensing performance of the gas sensor made of G-CNT materials also showed good response compared to that of CNTs. This experimental work paved the way for how we can selectively synthesize CNTs and G-CNTs via the FCCVD method, and G-CNTs have proven to be a better material for gas sensors.


2014 ◽  
Vol 807 ◽  
pp. 13-39
Author(s):  
Bavani Kasinathan ◽  
Ruzniza Mohd Zawawi

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.


2014 ◽  
Vol 2 (32) ◽  
pp. 13123-13128 ◽  
Author(s):  
Lili Fan ◽  
Kunlin Wang ◽  
Jinquan Wei ◽  
Minlin Zhong ◽  
Dehai Wu ◽  
...  

The location of nanoparticles is a straightforward reflection of the nucleation sites of graphene growth. The deposition of nanoparticles is consistent with the distribution of multilayer graphene.


2016 ◽  
Vol 148 ◽  
pp. 1295-1302
Author(s):  
May Ali ◽  
Suraya Abdul-Rashid ◽  
Mohd Nizar Hamidon ◽  
Faizah Md Yasin

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75839-75843 ◽  
Author(s):  
Hammad ul Hassan ◽  
Jihun Mun ◽  
Byung Soo Kang ◽  
Jae Yong Song ◽  
Taewan Kim ◽  
...  

The gas sensing property of CVD-grown MoS2 for O2 and CO2 which acted as charge donors was examined.


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