Reduced graphene oxide–gold nanorod composite material stabilized in silicate sol–gel matrix for nitric oxide sensor

Jayabal, Subramaniam; Viswanathan, Perumal; Ramaraj, Ramasamy

doi:10.1039/c4ra04859h

Cited by 40 publications

(22 citation statements)

References 60 publications

(72 reference statements)

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“…Fortunately, some analytical techniques including spectroscopic and electrochemical methods are often used for the detection of NO. [20][21][22] As known, graphene is a two dimensional carbon sheet having single atom thickness, large theoretical surface area (2630 m 2 g -1 ) with high conductivity at room temperature (10 6 s cm -1 ) and wide electrochemical window. 13 In recent years, constructing a competent electrochemical sensor is highly motivated among researchers for the sensitive detection of NO.…”

Section: Introductionmentioning

confidence: 99%

An electrochemical sensing platform based on a reduced graphene oxide–cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection

et al. 2015

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We report a facile one-pot hydrothermal synthesis of reduced graphene oxide-cobalt oxide nanocubes@platinum (rGO-Co 3 O 4 @Pt) nanocomposite and its application toward the electrochemical detection of nitric oxide (NO). The rGO-Co 3 O 4 @Pt nanocomposite was characterized by field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) mapping, X-ray diffraction (XRD) and Raman analyses. The nanocomposite modified glassy carbon (GC) electrode was used for the electrochemical oxidation of nitric oxide (NO) and it showed better catalytic performance in terms of catalytic peak current and shift in overpotential when compared to rGO, Co 3 O 4 nanocubes and rGO-Co 3 O 4 nanocomposite modified electrodes. The rGO-Co 3 O 4 @Pt nanocomposite modified electrode showed a better sensing ability toward the in-situ generated NO in NO 2 containing phosphate buffer solution (PBS) than the other controlled modified electrodes. The Pt nanoparticles present in the nanocomposite could enhance the sensing performance and the limit of detection (LOD) was found as 1.73 µM with signal-to-noise (S/N) ratio ~3 using amperometric i-t curve. Further, the nanocomposite modified electrode showed the selectivity toward the detection of NO in the presence of 100-fold higher concentration of other physiologically important analytes. The proposed sensor was stable, reproducible and selective toward the detection of NO.

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Section: Introductionmentioning

confidence: 99%

An electrochemical sensing platform based on a reduced graphene oxide–cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection

et al. 2015

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“…1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 These changes are due to the i) change in the local refractive index of the medium surrounding the NRs after modification and ii) the change in the aspect ratio of the NRs after modification. 83,88 The surface functionalized Au NRs will act as both a recognition element for the analyte receptor and a transducer for signal processing, thereby simplifying the sensor design, with improves sensitivity and selectivity. Fig.…”

Section: 79mentioning

confidence: 99%

A gold nanorod-based localized surface plasmon resonance platform for the detection of environmentally toxic metal ions

Jayabal

Pandikumar

Lim

et al. 2015

Analyst

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Gold nanorods (Au NRs) are elongated nanoparticles with unique optical properties which depend on their shape anisometry. The Au NR-based longitudinal localized surface plasmon resonance (longitudinal LSPR) band is very sensitive to the surrounding local environment and upon the addition of target analytes, the interaction between the analytes and the surface of the Au NRs leads to a change in the longitudinal LSPR band. This makes it possible to devise Au NR probes with application potential to the detection of toxic metal ions with an improved limit of detection, response time, and selectivity for the fabrication of sensing devices. The effective surface modification of Au NRs helps in improving their selectivity and sensitivity toward the detection of toxic metal ions. In this review, we discuss different methods for the preparation of surface modified Au NRs for the detection of toxic metal ions based on the LSPR band of the Au NRs and the types of interactions between the surface of Au NRs and metal ions. We summarize the work that has been done on Au NR-based longitudinal LSPR detection of environmentally toxic metal ions, sensing mechanisms, and the current progress in various modified Au NR-based longitudinal LSPR sensors for toxic metal ions. Finally, we discuss the applications of Au NR-based longitudinal LSPR sensors to real sample analysis and some of the future challenges facing longitudinal LSPR-based sensors for the detection of toxic metal ions toward commercial devices.

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“…Graphene‐based electrochemical sensors have also been employed to detect other analytes, such as gas (NO and NH 3 ), environmental pollutants (hydroquinone, catechol, methyl jasmonate, hydrazine, and mercury ions), pharmaceutical medicine (nimodipine, rutin, paracetamol, etc. ), industrial compounds (methanol and ethanol), explosives (TNT), and pesticides (triazophos).…”

Section: Others Kinds Of Biosensorsmentioning

confidence: 99%

Recent Progress on Graphene-based Electrochemical Biosensors

Shen

Wang

et al. 2015

The Chemical Record

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The detailed records and conclusions on the important advancements in graphene-based electrochemical biosensors have been reviewed. Due to their outstanding properties, graphene-based materials have been widely studied for the accurate electrochemical detection of many biomolecules, which is extremely vital to the development of biomedical instruments, clinical diagnosis, and disease treatment. This review discusses the graphene research for the effective immobilization of enzymes, including glucose oxidase, horseradish peroxidase, and hemoglobin, etc., and the accurate detection of biomolecules, including glucose, hydrogen peroxide, dopamine, ascorbic acid, uric acid, nicotinamide adenine dinucleotide, DNA, RNA, and carcinoembryonic antigen, etc. In most of the cases, the graphene-based biosensors exhibited remarkable performance with high sensitivities, wide linear detection ranges, low detection limits, and long-term stabilities.

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Reduced graphene oxide–gold nanorod composite material stabilized in silicate sol–gel matrix for nitric oxide sensor

Cited by 40 publications

References 60 publications

An electrochemical sensing platform based on a reduced graphene oxide–cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection

An electrochemical sensing platform based on a reduced graphene oxide–cobalt oxide nanocube@platinum nanocomposite for nitric oxide detection

A gold nanorod-based localized surface plasmon resonance platform for the detection of environmentally toxic metal ions

Recent Progress on Graphene-based Electrochemical Biosensors

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