Hybrid films of reduced graphene oxide modified with gold nanorods and its study as surface-enhanced Raman spectroscopy platform

Jimenez-Vara, P.B.; Johny, Jacob; León, I.C. Novoa-De; Guerrero‐Bermea, Cynthia; García-Gutiérrez, Diana F.; Chávez-Guerrero, L.; Sepúlveda-Guzmán, S.

doi:10.1016/j.matlet.2020.127405

Cited by 9 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2 mg of monolayer GO nanosheet powder was dissolved in 1 mL of deionized water, and it was sonicated for 20 min at the highest power. , Different ratios of GO and AuNR were mixed, sonicated and stirred for 30 min, centrifuged, and resuspended in deionized water to obtain GO/AuNR dispersion.…”

Section: Methodsmentioning

confidence: 99%

Surface Acoustic Wave Devices Based on Graphene Oxide/Au Nanorod Composites for Gas-Phase Detection of 2,4,6-Trinitrotoluene

Yang

Wang

Gao

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

Surface acoustic wave (SAW) devices are extensively used to detect various gaseous chemicals, owing to their wireless passive potential and single-signal display. However, the sensitivity, selectivity, and long response time of the sensitive layers limit their use in detecting explosive gases. In this study, we developed a 2,4,6-trinitrotoluene (TNT) gas sensor based on the SAW device with GO/PDEA/AuNR/PATP nanocomposites. The GO/PDEA/AuNR/PATP-SAW sensor recorded a considerable negative frequency shift (−70.67 kHz) in detecting 80 ppm TNT at 25 °C/20 RH %, thus enabling the detection of 40 ppb to 80 ppm TNT with the limit of detection as low as 40 ppb (−3.02 kHz). Short response/recovery time (40 ppb: 6.2/11.8 s) with good cycling stability and selectivity were achieved. The high performance of the GO/PDEA/AuNR/PATP-SAW sensor is attributed to its large specific surface area, roughness, and porosity. The oxygen-containing and electron-rich amino groups of the GO/PDEA/AuNR/ PATP provide many active sites for adsorbing TNT gas. The primary sensing mechanism is the mass and electrical load of the nanocomposite in TNT gas. It has an optimum thickness of 380 nm and room temperature as the optimum operating temperature. Therefore, this study would serve as a good basis for the research and development of next-generation acoustic gas-phase explosive sensors.

show abstract

Section: Methodsmentioning

confidence: 99%

Surface Acoustic Wave Devices Based on Graphene Oxide/Au Nanorod Composites for Gas-Phase Detection of 2,4,6-Trinitrotoluene

Yang

Wang

Gao

et al. 2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…Plasmonic nanostructures have unique optical properties that can be represented by the optical crosssection and appropriate wide range of applications in biotechnology [10][11][12]. Au nanoparticles (AuNPs) have been used in the eld of catalysis, optical sensor [13,14], surface-enhanced Raman spectroscopy (SERS) [15][16][17], and biological molecule detection based on their optical properties, electrical properties, and various extinction constants [18]. One well-known optical aspect of AuNPs is the localized surface plasmon resonance, resulting from the interaction of the incident electromagnetic wave with plasmonic nanoparticles which causes a collective oscillation of conduction electrons [19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

LSPR Sensor Chip Fabricated Based on Au Nanoparticles: Effect of Graphene Oxide and Reduced Graphene Oxide

Ayareh

Moradi

2022

Preprint

View full text Add to dashboard Cite

Nanoparticles of noble metals are well known to display unique optical properties due to the localized surface plasmon resonance (LSPR) phenomenon, making them applicable for use as transducers in various LSPR sensor configurations. In order to develop a sensor chip, Au nanoparticles (AuNPs) were decorated onto a transparent glass substrate in the form of a uniform, high-density single layer using a self-assembly monolayer (SAM) process. The glass substrate surface was initially modified with amine functional groups using different concentrations of (3-Aminopropyl) triethoxysilane (APTES), followed by its optimization to reach a uniform monolayer of AuNPs. The optimized substrate was subsequently prepared by functionalization with APTES, while also being immersed into colloidal AuNPs. A uniform layer of Graphene oxide (GO) and reduced graphene oxide (rGO) sheets were coated on the AuNPs thin films using the dip-coating technique. The AuNPs/GO and rGO hybrid films were employed along with an appropriate optical set up acting as a smart sensor chip for detection of different concentrations of biomaterials. The optimum LSPR sensor (%0.5 APTES immersed in colloidal AuNPs for 12 h) resulted in a chip with %29 absorption and sharper plasmon peak. This appropriate condition remained constant after adding rGO, indicating that Glass/AuNPs/rGO chip will be suitable for sensory applications.

show abstract

Nanoplasmonic Sensor Chip Fabricated Based on Au Nanoparticles: Effect of Graphene Oxide and Reduced Graphene Oxide

Ayareh

Moradi

2022

Plasmonics

View full text Add to dashboard Cite

Hybrid films of reduced graphene oxide modified with gold nanorods and its study as surface-enhanced Raman spectroscopy platform

Cited by 9 publications

References 9 publications

Surface Acoustic Wave Devices Based on Graphene Oxide/Au Nanorod Composites for Gas-Phase Detection of 2,4,6-Trinitrotoluene

Surface Acoustic Wave Devices Based on Graphene Oxide/Au Nanorod Composites for Gas-Phase Detection of 2,4,6-Trinitrotoluene

LSPR Sensor Chip Fabricated Based on Au Nanoparticles: Effect of Graphene Oxide and Reduced Graphene Oxide

Nanoplasmonic Sensor Chip Fabricated Based on Au Nanoparticles: Effect of Graphene Oxide and Reduced Graphene Oxide

Contact Info

Product

Resources

About