Surface plasmon enhancement of photoluminescence in photo-chemically synthesized graphene quantum dot and Au nanosphere

Park, Byeongho; Kim, Sun Jun; Sohn, Ji Soo; Nam, Min Sik; Kang, Shinill; Jun, Seong Chan

doi:10.1007/s12274-016-1079-9

Cited by 30 publications

(26 citation statements)

References 59 publications

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“…This complex nanostructures composed of Ag NPs concentrates the photon energy in a small region, which significantly enhances the local electromagnetic field. The area affected by the enhanced electromagnetic field, called a “hot spot”, contributes to amplify the weak emission signal 32 .…”

Section: Resultsmentioning

confidence: 99%

Highly Luminescent Ternary Nanocomposite of Polyaniline, Silver Nanoparticles and Graphene Oxide Quantum Dots

Shokry

Khalil

Ibrahim

et al. 2019

Sci Rep

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Quantum dots (QDs) with photostability show a potential application in optical sensing and biological imaging. In this work, ternary nanocomposite (NC) of high fluorescent polyaniline (PANI)/2-acrylamido-2-methylpropanesulfonic acid (AMPSA) capped silver nanoparticles (NPs)/graphene oxide quantum dots (PANI/Ag (AMPSA)/GO QDs) have been synthesized by in situ chemical oxidative polymerization of aniline in the presence of Ag (AMPSA) NPs and GO QDs. Ag (AMPSA) NPs and GO QDs were prepared by AgNO3 chemical reduction and glucose carbonization methods, respectively. The prepared materials were characterized using UV-visible, Fourier transform infrared (FTIR), photoluminescence and Raman spectroscopies, X-Ray diffractometer (XRD) and high- resolution transmission electron microscopy (HRTEM). HRTEM micrographs confirmed the preparation of GO QDs with an average size of 15 nm and Ag (AMPSA) NPs with an average size of 20 nm. PANI/Ag (AMPSA)/GO QDs NC showed high and stable emission peak at 348 nm. This PANI/Ag (AMPSA)/GO QDs NC can emerge as a new class of fluorescence materials that could be suitable for practical sensing applications.

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Section: Resultsmentioning

confidence: 99%

Highly Luminescent Ternary Nanocomposite of Polyaniline, Silver Nanoparticles and Graphene Oxide Quantum Dots

Shokry

Khalil

Ibrahim

et al. 2019

Sci Rep

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“…The great success achieved in the photo-electrochemical field until now is triggering immense enthusiasm for exploring highly photoactive materials. Transition metal dichalcogenides, titanium dioxide, carbon nitride, quantum dots, and noble metals are the most sought after photoactive materials [ 8 , 9 , 10 , 11 , 12 ]. Recently, nitrogen-doped graphene quantum dots (NGQDs), which have unique quantum effects, substantial photostability, and good biocompatibility, have been widely applied in electronics, for photocatalysis, as well as in biosensors [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Au–Nitrogen-Doped Graphene Quantum Dot Composites as “On–Off” Nanosensors for Sensitive Photo-Electrochemical Detection of Caffeic Acid

Zhao

Zhou

et al. 2020

Nanomaterials

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Herein, gold–nitrogen-doped graphene quantum dot (Au/NGQD) composite modified electrodes were fabricated and applied as “on–off” nanosensors for the photo-electrochemical (PEC) detection of caffeic acid under visible-light irradiation. An effective and simple strategy was established for the preparation of Au/NGQD composites by hydrothermal and calcination methods. Owing to the quantum confinement effect of NGQDs, the local surface plasmon resonance (LSPR) effect of Au nanoparticles (NPs), and the synergistic effect between Au and NGQDs NPs, the Au/NGQDs showed excellent PEC performance, with wide linear concentration ranges (0.11 to 30.25 μM and 30.25 to 280.25 μM), a low detection limit (0.03 μM), excellent sensitivity, and high stability. The present study may provide an advanced strategy for the simple design of Au/NGQD composites to allow their effective application for selective and sensitive sensing of small biological molecules.

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“…Due to these reasons, the graphene-related nanomaterials such as graphene nanoflakes, graphene networks and graphene nanodots are attracting an increasing interest in last years [6][7][8][9]. Recently, hybrid nanomaterials and complex nanostructures composed of graphene and carbon nanotubes interfaced with composites and metal nanoparticles (NPs) (inclusion noble metals such as Ag and Au) have become the important research areas due to their potential applications in optoelectronics, biology, and medical sciences such as cell imaging, drug delivery and cell therapy [5,[10][11][12][13][14][15]. However, the hybrid nanomaterials of graphene and noble metal NPs are mainly synthesized via solution routes, which require a long (up to 24 h) synthesis duration due to the complicated reactions involved [13,15].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, hybrid nanomaterials and complex nanostructures composed of graphene and carbon nanotubes interfaced with composites and metal nanoparticles (NPs) (inclusion noble metals such as Ag and Au) have become the important research areas due to their potential applications in optoelectronics, biology, and medical sciences such as cell imaging, drug delivery and cell therapy [5,[10][11][12][13][14][15]. However, the hybrid nanomaterials of graphene and noble metal NPs are mainly synthesized via solution routes, which require a long (up to 24 h) synthesis duration due to the complicated reactions involved [13,15]. Importantly, advanced applications of the hybrid nanomaterials of graphene and noble metal NPs are often related to their optical properties [5,[11][12][13][14][15], but the effects of the interfaces between graphene and noble metal NPs on the optical emission is not comprehensively studied.…”

Section: Introductionmentioning

confidence: 99%

“…However, the hybrid nanomaterials of graphene and noble metal NPs are mainly synthesized via solution routes, which require a long (up to 24 h) synthesis duration due to the complicated reactions involved [13,15]. Importantly, advanced applications of the hybrid nanomaterials of graphene and noble metal NPs are often related to their optical properties [5,[11][12][13][14][15], but the effects of the interfaces between graphene and noble metal NPs on the optical emission is not comprehensively studied. For example, the results obtained by Lan et al and the studies of Park et al indicate that the photoluminescence (PL) emission of graphene oxide/Ag and graphene quantum dots/Au hybrid nanomaterials is enhanced by Ag and Au nanoparticles, and the enhancement was attributed to surface plasmons generated by Ag and Au NPs [12,15].…”

Section: Introductionmentioning

confidence: 99%

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Carbon nanoflake-nanoparticle interface: A comparative study on structure and photoluminescent properties of carbon nanoflakes synthesized on nanostructured gold and carbon by hot filament CVD

Wang

Zhu

et al. 2017

Carbon

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Three dimensional vertically-oriented carbon nanoflakes grown on carbon and gold nanoparticles by the hot filament chemical vapor deposition in CH 4 environment demonstrate quite similar structure and composition, but drastically different room temperature photoluminescent properties. The interfacial interactions were asserted to be the main reason for the differences in the optical emission. The mechanisms of highly oriented growth, generation and enhancement of photoluminescence were investigated, and it was demonstrated that the formation of oriented nanoflakes resulted from the stress produced in the carbon layers on carbon and gold nanoparticles. Specifically, deformation of nanoparticles and difference in the expansion rates of carbon layer, gold and carbon nanoparticles are the main causes for the stress formation. The oriented growth of carbon nanoflakes is maintained by the repulsion effect between the carbon nanoflakes due to the net charge produced from the hydrocarbon radicals on the edges of carbon nanoflakes via charge transfer between H and C atoms. The photoluminescence generation of carbon nanoflakes is related to the sp 2 carbon clusters on the edges of carbon nanoflakes. Strong green photoluminescent emission from the carbon nanoflake/gold nanoparticle system than from the carbon nanoflake/carbon nanoparticle system is the result of the intense plasmon emission from gold nanoparticles..

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Surface plasmon enhancement of photoluminescence in photo-chemically synthesized graphene quantum dot and Au nanosphere

Cited by 30 publications

References 59 publications

Highly Luminescent Ternary Nanocomposite of Polyaniline, Silver Nanoparticles and Graphene Oxide Quantum Dots

Highly Luminescent Ternary Nanocomposite of Polyaniline, Silver Nanoparticles and Graphene Oxide Quantum Dots

Au–Nitrogen-Doped Graphene Quantum Dot Composites as “On–Off” Nanosensors for Sensitive Photo-Electrochemical Detection of Caffeic Acid

Carbon nanoflake-nanoparticle interface: A comparative study on structure and photoluminescent properties of carbon nanoflakes synthesized on nanostructured gold and carbon by hot filament CVD

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