Graphene on SiC Substrate as Biosensor: Theoretical Background, Preparation, and Characterization

This work is devoted to the development and optimization of the parameters of graphene-based sensors. The graphene films used in the present study were grown on semi-insulating 6H-SiC substrates by thermal decomposition of SiC at the temperature of ~1700 °C. The results of measurements by Auger and Raman spectroscopies confirmed the presence of single-layer graphene on the silicon carbide surface. Model approach to the theory of adsorption on epitaxial graphene is presented. It is demonstrated that the Green-function method in conjunction with the simple substrate models permit one to obtain analytical results for the charge transfer between adsorbed molecules and substrate. The sensor structure was formed on the graphene film by laser. Initially, a simpler gas sensor was made. The sensors developed in this study demonstrated sensitivity to the NO2 concentration at the level of 1–0.01 ppb. The results obtained in the course of development and the results of testing of the graphene-based sensor for detection of protein molecules are also presented. The biosensor was fabricated by the technology previously developed for the gas sensor. The working capacity of the biosensor was tested with an immunochemical system constituted by fluorescein and monoclonal antibodies (mAbs) binding this dye.

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Experimental observation of a suspended single layer graphene film on Cu foil grown via chemical vapor deposition method

physica status solidi (b) ◽

10.1002/pssb.201349128 ◽

2013 ◽

Vol 250 (9) ◽

pp. 1874-1877 ◽

Cited By ~ 6

Author(s):

Won-Hwa Park ◽

Myunghee Jung ◽

Jin-San Moon ◽

Wonbae Park ◽

Taehyeong Kim ◽

...

Keyword(s):

Chemical Vapor Deposition ◽

Vapor Deposition ◽

Graphene Film ◽

Single Layer ◽

Chemical Vapor ◽

Single Layer Graphene ◽

Chemical Vapor Deposition Method ◽

Deposition Method ◽

Layer Graphene ◽

Cu Foil

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Field Emission of Single-Layer Graphene Films Prepared by Electrophoretic Deposition

Advanced Materials ◽

10.1002/adma.200802560 ◽

2009 ◽

Vol 21 (17) ◽

pp. 1756-1760 ◽

Cited By ~ 543

Author(s):

Zhong-Shuai Wu ◽

Songfeng Pei ◽

Wencai Ren ◽

Daiming Tang ◽

Libo Gao ◽

...

Keyword(s):

Field Emission ◽

Electrophoretic Deposition ◽

Single Layer ◽

Single Layer Graphene ◽

Layer Graphene ◽

Graphene Films

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An Analytical Multiple-Temperature Model for Flash Laser Irradiation on Single-Layer Graphene

Nanomaterials ◽

10.3390/nano10071319 ◽

2020 ◽

Vol 10 (7) ◽

pp. 1319

Author(s):

Anca M. Bucă ◽

Mihai Oane ◽

Ion N. Mihăilescu ◽

Muhammad Arif Mahmood ◽

Bogdan A. Sava ◽

...

Keyword(s):

Laser Irradiation ◽

Single Layer ◽

Single Layer Graphene ◽

Heat Equations ◽

Quantum Field Theories ◽

Temperature Model ◽

Green Function Method ◽

Classical Mathematics ◽

Nonequilibrium Green Function ◽

Simple Equations

A Multiple-Temperature Model is proposed to describe the flash laser irradiation of a single layer of graphene. Zhukovsky’s mathematical approach is applied to solve the Fourier heat equations based upon quantum concepts, including heat operators. Easy solutions were inferred with respect to classical mathematics. Thus, simple equations were set for the electrons and phonon temperatures in the case of flash laser treatment of a single layer of graphene. Our method avoids the difficulties and extensive time-consuming nonequilibrium green function method or quantum field theories when applied in a condensed matter. Simple expressions were deduced that could prove useful for researchers.

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Comparative Investigation of the Graphene-on-Silicon Carbide and CVD Graphene as a Basis for Biosensor Application

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.799.185 ◽

2019 ◽

Vol 799 ◽

pp. 185-190 ◽

Cited By ~ 1

Author(s):

Natalja Sleptsuk ◽

Alexander A. Lebedev ◽

Ilya Eliseyev ◽

Oleg Korolkov ◽

Jana Toompuu ◽

...

Keyword(s):

Impedance Spectroscopy ◽

Electrode Materials ◽

Single Layer ◽

Chemical Vapor ◽

Comparative Investigation ◽

Epitaxial Graphene ◽

Single Layer Graphene ◽

Electrochemical Biosensing ◽

Graphene Films ◽

Biosensor Application

Graphene has been employed as electrode materials in various electrochemical biosensors due to its excellent electrical, mechanical, thermal and optical properties. In the present study, Chemical Vapor Deposited (CVD) and epitaxial graphene on SiC were examined as material for electrochemical biosensing application. The surface of both types of graphene were characterized using Raman spectroscopy as well as with Scanning Electron Microscopy (SEM). As the key point for the comparison, the impedance spectroscopy measurements of different graphene films using deionized water and saline 0.9% NaCl solution were performed as well. The method of impedance measurements applied to graphene films expands the range of possibilities for using this material as sensitive biosensors. Based on the comparative tests results, it is possible to draw the first simple conclusions about the advantages of CVD or epitaxial graphene. Based on the results of impedance spectroscopy, it is possible to draw a simple conclusion – single layer graphene has the higher sensitivity.

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Direct electrosynthesis of 52% concentrated CO on silver’s twin boundary

Nature Communications ◽

10.1038/s41467-021-22428-1 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Can Tang ◽

Peng Gong ◽

Taishi Xiao ◽

Zhengzong Sun

Keyword(s):

Twin Boundary ◽

Large Scale ◽

Graphene Film ◽

Single Layer ◽

Gaseous Product ◽

Single Layer Graphene ◽

Volume Percentage ◽

Faradaic Efficiency ◽

Boundary Density ◽

Exchange Membrane

AbstractThe gaseous product concentration in direct electrochemical CO2 reduction is usually hurdled by the electrode’s Faradaic efficiency, current density, and inevitable mixing with the unreacted CO2. A concentrated gaseous product with high purity will greatly lower the barrier for large-scale CO2 fixation and follow-up industrial usage. Here, we developed a pneumatic trough setup to collect the CO2 reduction product from a precisely engineered nanotwinned electrocatalyst, without using ion-exchange membrane. The silver catalyst’s twin boundary density can be tuned from 0.3 to 1.5 × 104 cm−1. With the lengthy and winding twin boundaries, this catalyst exhibits a Faradaic efficiency up to 92% at −1.0 V and a turnover frequency of 127 s−1 in converting CO2 to CO. Through a tandem electrochemical-CVD system, we successfully produced CO with a volume percentage of up to 52%, and further transformed it into single layer graphene film.

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Synthesis of large area, homogeneous, single layer graphene films by annealing amorphous carbon on Co and Ni

Nano Research ◽

10.1007/s12274-011-0109-x ◽

2011 ◽

Vol 4 (6) ◽

pp. 531-540 ◽

Cited By ~ 60

Author(s):

Carlo M. Orofeo ◽

Hiroki Ago ◽

Baoshan Hu ◽

Masaharu Tsuji

Keyword(s):

Amorphous Carbon ◽

Single Layer ◽

Single Layer Graphene ◽

Large Area ◽

Layer Graphene ◽

Graphene Films

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Synthesis of single-layer graphene film by chemical vapor deposition with molten gallium catalyst on silicon dioxide

Journal of Materials Science ◽

10.1007/s10853-019-04131-1 ◽

2019 ◽

Vol 55 (7) ◽

pp. 2787-2795

Author(s):

Pengbo Zhang ◽

Xifeng Liu ◽

Xiaohong Fang ◽

Xiaoyuan Chen

Keyword(s):

Chemical Vapor Deposition ◽

Silicon Dioxide ◽

Vapor Deposition ◽

Graphene Film ◽

Single Layer ◽

Chemical Vapor ◽

Single Layer Graphene ◽

Layer Graphene

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Direct synthesis of single-layer graphene films on quartz substrate by a nanoparticle-assisted method

Applied Surface Science ◽

10.1016/j.apsusc.2020.147082 ◽

2020 ◽

Vol 529 ◽

pp. 147082 ◽

Cited By ~ 1

Author(s):

Yue Li ◽

Yunbiao Zhao ◽

Yi Chen ◽

Yuhan Chen ◽

Danqing Zhou ◽

...

Keyword(s):

Quartz Substrate ◽

Direct Synthesis ◽

Single Layer ◽

Single Layer Graphene ◽

Layer Graphene ◽

Graphene Films

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Printing of Crumpled CVD Graphene via Blister-Based Laser-Induced Forward Transfer

Nanomaterials ◽

10.3390/nano10061103 ◽

2020 ◽

Vol 10 (6) ◽

pp. 1103 ◽

Cited By ~ 3

Author(s):

Maxim S. Komlenok ◽

Pavel A. Pivovarov ◽

Margarita A. Dezhkina ◽

Maxim G. Rybin ◽

Sergey S. Savin ◽

...

Keyword(s):

Carbon Film ◽

Graphene Film ◽

Single Layer ◽

Single Layer Graphene ◽

Original Structure ◽

Si Substrate ◽

Layer Graphene ◽

Forward Transfer ◽

Laser Techniques ◽

Original Crystal

The patterning and transfer of a two-dimensional graphene film without damaging its original structure is an urgent and difficult task. For this purpose, we propose the use of the blister-based laser-induced forward transfer (BB-LIFT), which has proven itself in the transfer of such delicate materials. The ease of implementation of laser techniques reduces the number of intermediate manipulations with a graphene film, increasing its safety. The work demonstrates the promise of BB-LIFT of single-layer graphene from a metal surface to a SiO2/Si substrate. The effect of the parameters of this method on the structure of transferred graphene islands is investigated. The relevance of reducing the distance between irradiating and receiving substrates for the transfer of free-lying graphene is demonstrated. The reasons for the damage to the integrity of the carbon film observed in the experiments are discussed. The preservation of the original crystal structure of transferred graphene is confirmed by Raman spectroscopy.

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