J. Semicond. > Volume 39 > Issue 1 > Article Number: 013002

Ultrathin free-standing graphene oxide film based flexible touchless sensor

Lin Liu 1, 2, , Yingyi Wang 2, , Guanghui Li 1, , Sujie Qin 2, , and Ting Zhang 1, ,

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Abstract: Ultrathin free-standing graphene oxide (GO) films were fabricated by vacuum filtration method assisted with Ni(OH)2 nanosheets as the sacrifice layer. The surface of the obtained GO film is very clean as the Ni(OH)2 nanosheets can be thoroughly etched by HCl. The thickness of the GO films can be well-controlled by changing the volume of GO dispersion, and the thinnest GO film reached ~12 nm. As a novel and transparent dielectric material, the GO film has been applied as the dielectric layer for the flexible touchless capacitive sensor which can effectively distinguish the approaching of an insulator or a conductor.

Key words: graphene oxidefree-standing filmtouchless sensor

Abstract: Ultrathin free-standing graphene oxide (GO) films were fabricated by vacuum filtration method assisted with Ni(OH)2 nanosheets as the sacrifice layer. The surface of the obtained GO film is very clean as the Ni(OH)2 nanosheets can be thoroughly etched by HCl. The thickness of the GO films can be well-controlled by changing the volume of GO dispersion, and the thinnest GO film reached ~12 nm. As a novel and transparent dielectric material, the GO film has been applied as the dielectric layer for the flexible touchless capacitive sensor which can effectively distinguish the approaching of an insulator or a conductor.

Key words: graphene oxidefree-standing filmtouchless sensor



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Tang L A L, Lee W C, Shi H, et al. Highly wrinkled cross-linked graphene oxide membranes for biological and charge-storage applications. Small, 2012, 8(3): 423

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Qin S Y, Liu X J, Zhuo R X, et al. Microstructure-controllable graphene oxide hydrogel film based on a ph-responsive graphene oxide hydrogel. Macromol Chem Phys, 2012, 213(19): 2044

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Teradal N L, Mars S, Morag A, et al. Porous graphene oxide chemi-capacitor vapor sensor array. J Mater Chem C, 2017, 5(5): 1128

[30]

Aezinia F, Wang Y F, Bahreyni B. Three dimensional touchless tracking of objects using integrated capacitive sensors. IEEE Transn Consum Electron, 2012, 58(3): 886

[31]

Haslinger L, Hehenberger S, Zagar B G. Capacitance measurement system for touchless interaction. Proc Eng, 2016, 168: 737

[32]

Garbini J L, Saunders R A, Jorgensen J E. In-process drilled hole inspection for aerospace applications. Prec Eng, 1991, 13(2): 125

[1]

Bao Z N, Chen X D. Flexible and stretchable devices. Adv Mater, 2016, 28(22): 4177

[2]

Yun S, Park S, Park B, et al. Polymer-waveguide-based flexible tactile sensor array for dynamic response. Adv Mater, 2014, 26(26): 4474

[3]

Aezinia F, Wang Y F, Bahreyni B, et al. Three dimensional touchless tracking of objects using integrated capacitive sensors. IEEE Trans Consum Electr, 2012, 58(3): 886

[4]

Szendrei K, Ganter P, Sobrado O S, et al. Touchless optical finger motion tracking based on 2D nanosheets with giant moisture responsiveness. Adv Mater, 2015, 27(41): 6341

[5]

Yu L, Xu H L, Monro T M, et al. Ultrafast colorimetric humidity-sensitive polyelectrolyte coating for touchless control. Mater Horiz, 2017, 4(1): 72

[6]

Feng J, Peng L L, Wu C Z, et al. Giant moisture responsiveness of VS2 ultrathin nanosheets for novel touchless positioning interface. Adv Mater, 2012, 24(15): 1969

[7]

Chi H, Liu Y J, Wang F K, et al. Highly sensitive and fast response colorimetric humidity sensors based on graphene oxides film. ACS Appl Mater Interfaces, 2015, 7(36): 19882

[8]

Borini S, White R, Wei D, et al. Ultrafast graphene oxide humidity sensors. ACS Nano, 2013, 7(12): 11166

[9]

Standley B, Mendez A, Schmidgall E, et al. Graphene-graphite oxide field-effect transistors. Nano Lett, 2012, 12(3): 1165

[10]

Liang G H, Wang Y C, Mei D Q, et al. Flexible capacitive tactile sensor array with truncated pyramids as dielectric layer for three-axis force measurement. J Microelectromech Syst, 2015, 24(5): 1510

[11]

Wang D R, Bao Y R, Zha J W, et al. Improved dielectric properties of nanocomposites based on poly(vinylidene fluoride) and poly(vinyl alcohol)-functionalized graphene. ACS Appl Mater Interfaces, 2012, 4(11): 6273

[12]

Chem S, Zhu J W, Wu X D, et al. Graphene oxide MnO2 nanocomposites for supercapacitors. ACS Nano, 2010, 4(5): 2822

[13]

Seredych M, Bandosz T J. Evaluation of GO/MnO2 composites as supercapacitors in neutral electrolytes: role of graphite oxide oxidation level. J Mater Chem, 2012, 22(44): 23525

[14]

Chen C M, Yang Q H, Yang Y G, et al. Self-assembled free-standing graphite oxide membrane. Adv Mater, 2009, 21(29): 3007

[15]

Medhekar N V, Ramasubramaniam A, Ruoff R S, et al. Hydrogen bond networks in graphene oxide composite paper: structure and mechanical properties. ACS Nano, 2010, 4(4): 2300

[16]

Kim H W, Yoon H W, Yoon S M, et al. Selective gas transport through few-layered graphene and graphene oxide membranes. Science, 2013, 342(6154): 95

[17]

Nair R R, Wu H A, Jayaram P N, et al. Unimpeded permeation of water through helium-leak-tight graphene-based membranes. Science, 2012, 335(6067): 442

[18]

Dikin D A, Stankoviich S, Zimney E J, et al. Preparation and characterization of graphene oxide paper. Nature, 2007, 448(7152): 457

[19]

Eda G, Fanchini G, Chhowalla M. Large-area ultrathin films of reduced graphene oxide as a transparent and flexible electronic material. Nat Nanotechnol, 2008, 3(5): 270

[20]

Cote L J, Kim F, Huang J X. Langmuir-Blodgett assembly of graphite oxide single layers. J Am Chem Soc, 2009, 131(3): 1043

[21]

Li G H, Wang X W, Ding H Y, et al. A facile synthesis method for Ni(OH)2 ultrathin nanosheets and their conversion to porous NiO nanosheets used for formaldehyde sensing. RSC Adv, 2012, 2(33): 13018

[22]

Shen J, Liu G P, Huang K, et al. Subnanometer two-dimensional graphene oxide channels for ultrafast gas sieving. ACS Nano, 2016, 10(3): 3398

[23]

Song F X, Jie W B, Zhang T, et al. Room-temperature fabrication of a three-dimensional reduced-graphene oxide/ polypyrrole/hydroxyapatite composite scaffold for bone tissue engineering. RSC Adv, 2016, 6(95): 92804

[24]

Peng H D, Meng L J, Niu L Y, et al. Simultaneous reduction and surface functionalization of graphene oxide by natural cellulose with the assistance of the ionic liquid. J Phys Chem C, 2012, 116(30): 16294

[25]

Yeh C, Raidongia K, Shao J, et al. On the origin of the stability of graphene oxide membranes in water. Nat Chem, 2014, 7(2): 166

[26]

Xi Y J, Hu J Q, Liu Z, et al. Graphene oxide membranes with strong stability in aqueous solutions and controllable lamellar spacing. ACS Appl Mater Interfaces, 2016, 8(24): 15557

[27]

Tang L A L, Lee W C, Shi H, et al. Highly wrinkled cross-linked graphene oxide membranes for biological and charge-storage applications. Small, 2012, 8(3): 423

[28]

Qin S Y, Liu X J, Zhuo R X, et al. Microstructure-controllable graphene oxide hydrogel film based on a ph-responsive graphene oxide hydrogel. Macromol Chem Phys, 2012, 213(19): 2044

[29]

Teradal N L, Mars S, Morag A, et al. Porous graphene oxide chemi-capacitor vapor sensor array. J Mater Chem C, 2017, 5(5): 1128

[30]

Aezinia F, Wang Y F, Bahreyni B. Three dimensional touchless tracking of objects using integrated capacitive sensors. IEEE Transn Consum Electron, 2012, 58(3): 886

[31]

Haslinger L, Hehenberger S, Zagar B G. Capacitance measurement system for touchless interaction. Proc Eng, 2016, 168: 737

[32]

Garbini J L, Saunders R A, Jorgensen J E. In-process drilled hole inspection for aerospace applications. Prec Eng, 1991, 13(2): 125

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L Liu, Y Y Wang, G H Li, S J Qin, T Zhang, Ultrathin free-standing graphene oxide film based flexible touchless sensor[J]. J. Semicond., 2018, 39(1): 013002. doi: 10.1088/1674-4926/39/1/013002.

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Manuscript received: 31 July 2017 Manuscript revised: 09 November 2017 Online: Accepted Manuscript: 27 December 2017 Published: 01 January 2018

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