Graphene oxide deposited microfiber knot resonator for gas sensing

Yu, Caibin; Wu, Yu; Liu, Xiaolei; Yao, Baicheng; Fu, Fei; Gong, Yuan; Rao, Yunjiang; Chen, Yuanfu

doi:10.1364/ome.6.000727

Cited by 66 publications

(42 citation statements)

References 32 publications

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“…The most prominent ones are, but not limited to, sensors [ 29 ], polymer composites, field effect transistors, energy related materials and biomedical applications [ 24 , 30 , 31 , 32 , 33 ]. Moreover, due to the disrupted sp 2 bonding networks in graphene oxide, it is also used as an insulating material [ 34 , 35 ], although it can easily be modified to a conductive material by introducing it into reducing agents [ 28 , 29 ]. Therefore, removing oxygen groups from GO platelets (i.e., reduction reaction) is also one of the most vital and interesting reactions of graphene oxide.…”

Section: Introductionmentioning

confidence: 99%

Oil Palm Waste-Based Precursors as a Renewable and Economical Carbon Sources for the Preparation of Reduced Graphene Oxide from Graphene Oxide

et al. 2017

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Herein, a new approach was proposed to produce reduced graphene oxide (rGO) from graphene oxide (GO) using various oil palm wastes: oil palm leaves (OPL), palm kernel shells (PKS) and empty fruit bunches (EFB). The effect of heating temperature on the formation of graphitic carbon and the yield was examined prior to the GO and rGO synthesis. Carbonization of the starting materials was conducted in a furnace under nitrogen gas for 3 h at temperatures ranging from 400 to 900 °C and a constant heating rate of 10 °C/min. The GO was further synthesized from the as-carbonized materials using the ‘improved synthesis of graphene oxide’ method. Subsequently, the GO was reduced by low-temperature annealing reduction at 300 °C in a furnace under nitrogen gas for 1 h. The IG/ID ratio calculated from the Raman study increases with the increasing of the degree of the graphitization in the order of rGO from oil palm leaves (rGOOPL) < rGO palm kernel shells (rGOPKS) < rGO commercial graphite (rGOCG) < rGO empty fruit bunches (rGOEFB) with the IG/ID values of 1.06, 1.14, 1.16 and 1.20, respectively. The surface area and pore volume analyses of the as-prepared materials were performed using the Brunauer Emmett Teller-Nitrogen (BET-N2) adsorption-desorption isotherms method. The lower BET surface area of 8 and 15 m2 g−1 observed for rGOCG and rGOOPL, respectively could be due to partial restacking of GO layers and locally-blocked pores. Relatively, this lower BET surface area is inconsequential when compared to rGOPKS and rGOEFB, which have a surface area of 114 and 117 m2 g−1, respectively.

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Section: Introductionmentioning

confidence: 99%

Oil Palm Waste-Based Precursors as a Renewable and Economical Carbon Sources for the Preparation of Reduced Graphene Oxide from Graphene Oxide

et al. 2017

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“…It can be observed that the f η values of GO increased over time as it was exposed to the gas for longer and longer times. This is expected because the large number of functional groups at the GO surface can effectively capture the gas molecules which enhances the RI of GO [30,31]. In the beginning, for each wavelength, the rate of increase of f η was high.…”

Section: Experimental Description Results and Discussionmentioning

confidence: 95%

Determination of dynamic variations in the optical properties of graphene oxide in response to gas exposure based on thin-film interference

2018

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We present an effective yet simple approach to study the dynamic variations in optical properties (such as the refractive index (RI)) of graphene oxide (GO) when exposed to gases in the visible spectral region, using the thin-film interference method. The dynamic variations in the complex refractive index of GO in response to exposure to a gas is an important factor affecting the performance of GO-based gas sensors. In contrast to the conventional ellipsometry, this method alleviates the need of selecting a dispersion model from among a list of model choices, which is limiting if an applicable model is not known a priori. In addition, the method used is computationally simpler, and does not need to employ any functional approximations. Further advantage over ellipsometry is that no bulky optics is required, and as a result it can be easily integrated into the sensing system, thereby allowing the reliable, simple, and dynamic evaluation of the optical performance of any GO-based gas sensor. In addition, the derived values of the dynamically changing RI values of the GO layer obtained from the method we have employed are corroborated by comparing with the values obtained from ellipsometry.

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“…Meanwhile, the development of waveguide-based graphene optical sensors has attracted much attention, which can improve the sensitivity and add more functionality to the conventional waveguide-based optical sensors. Especially, by integrating graphene and graphene oxide (GO) [27] on side-polished fibers [28], fused tapers [29], interferometers [30], and fiber microknots [31], various graphene biochemical sensors have been demonstrated. Compared with evanescent-wave devices based on microfibers, waveguide-integrated devices offer smaller footprints.…”

Section: Waveguide-integrated Graphene Photonic Devices For Sensing Amentioning

confidence: 99%

Recent Progress in Waveguide-Integrated Graphene Photonic Devices for Sensing and Communication Applications

et al. 2020

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Graphene is a two-dimensional material with numerous intriguing optical properties, such that graphene photonic devices have attracted great interest for sensing and communication applications. However, surface-illuminated graphene photonic devices usually suffer from weak light-matter interactions due to the atomic-layer thickness of graphene, seriously limiting the performances of such devices. To tackle this problem, waveguide-integrated graphene photonic devices have been demonstrated since 2010, which offer the advantage of much longer interaction length between the evanescent field of the optical waveguide and graphene than the surface-illuminated devices. Moreover, the fabrication of waveguide-integrated graphene photonic devices is compatible with CMOS technology, allowing potentially low-cost and high-density on-chip integration. To date, a tremendous interest is growing in the hybrid integration platform composed of graphene and silicon photonic integrated circuits. In this paper, we review the recent progress in waveguide-integrated graphene photonic devices and their applications in sensing and communication.

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Graphene oxide deposited microfiber knot resonator for gas sensing

Cited by 66 publications

References 32 publications

Oil Palm Waste-Based Precursors as a Renewable and Economical Carbon Sources for the Preparation of Reduced Graphene Oxide from Graphene Oxide

Oil Palm Waste-Based Precursors as a Renewable and Economical Carbon Sources for the Preparation of Reduced Graphene Oxide from Graphene Oxide

Determination of dynamic variations in the optical properties of graphene oxide in response to gas exposure based on thin-film interference

Recent Progress in Waveguide-Integrated Graphene Photonic Devices for Sensing and Communication Applications

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