Blue-Shifted SPR of Au Nanoparticles with Ordering of Carbon by Dense Ionization and Thermal Treatment

Singhal, Rahul; Kabiraj, D.; Kulriya, P.K.; Pivin, J. C.; Chandra, Ramesh; Avasthi, D.K.

doi:10.1007/s11468-012-9389-6

Cited by 45 publications

(10 citation statements)

References 56 publications

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“…The most probable reason for this blue shift might be the mixing of the cellulose-Au interface, thereby leading to an imperceptible change in the morphology of Au NPs. A similar result was reported for thin films of carbon-containing Au NPs …”

Section: Results and Discussionsupporting

confidence: 88%

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One-Pot Synthesis of a Three-Dimensional Au-Decorated Cellulose Nanocomposite as a Surface-Enhanced Raman Scattering Sensor for Selective Detection and in Situ Monitoring

Yang

Wen

et al. 2021

ACS Sustainable Chem. Eng.

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Metal nanoparticles (NPs) have been commonly introduced onto flexible platforms for improving their exploitation. However, such an introducing process of NPs is hard to achieve, and additional dispersants and high-energy consumption are largely required in existing studies. In this study, a one-pot method was developed to synthesize Au NPs in a cellulose dope. The dissolved cellulose chains acted as a green reductant as well as a stabilizer. As the polysaccharide dope coagulated, a three-dimensional (3D) regenerated cellulose nanocomposite decorated with 0.29−1.07 wt % Au NPs was successfully synthesized. As supported by the "hot spot" effect among the Au NPs embedded in the 3D structure, the nanocomposite could act as a sensitive surface-enhanced Raman scattering (SERS) substrate. Accordingly, this study achieved an enhancement factor of 2.8 × 10 7 and a limit of detection of 10 −9 M when R6G was employed as a probe molecule. Moreover, as impacted by the porous structure of the SERS substrate, 2.5 mg/kg melamine in milk could be directly detected. Furthermore, organic contaminants were catalytically reduced, and the process of catalytic reduction underwent in situ SERS monitoring with excellent sensitivity.

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Section: Results and Discussionsupporting

confidence: 88%

“…A similar result was reported for thin films of carbon-containing Au NPs. 39 The rheological properties of solutions critically impact its material construction. The effect of AuCl 4 − added on the steady shear viscosity, dynamic viscoelasticity, and stability of the cellulose dope after Au NPs introduction was determined.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

One-Pot Synthesis of a Three-Dimensional Au-Decorated Cellulose Nanocomposite as a Surface-Enhanced Raman Scattering Sensor for Selective Detection and in Situ Monitoring

Yang

Wen

et al. 2021

ACS Sustainable Chem. Eng.

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“…Metal NPs embedded in and positioned on the top of the substrates have been reported using the ion beam induced mixing technique for various energy regimes. 29,[30][31][32][33][34][35] Among noble metals, Au is one of the most preferred materials because of the large enhancement of the local field provided under irradiation in the visible and NIR as well as it high stability and biocompatibility. 36 Recently, we have reported the synthesis of Au NPs on the surface and embedded in the carbonaceous matrix using 150 keV Ar ion irradiation of a Au/polyethylene terephthalate (PET) bilayer system.…”

Section: Introductionmentioning

confidence: 99%

Optical and surface enhanced Raman scattering properties of Au nanoparticles embedded in and located on a carbonaceous matrix

Prakash

Kumar

Kroon

et al. 2016

Phys. Chem. Chem. Phys.

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Au nanoparticles (NPs) on the surface and embedded in a matrix have been the subject of studies dealing with a variety of spectroscopic and sensing applications. Here, we report on low energy Ar ion induced evolution of the morphology of a thin Au film on a polyethylene terephthalate (PET) substrate along with thermodynamic interpretations, and corresponding unique surface plasmon resonance (SPR) and photoluminescence (PL) properties. These properties are linked to the variation of surface nanostructures and the surface enhanced Raman scattering (SERS) effect of methyl orange (MO) dye molecules adsorbed on the surface. Ion induced thermal spike and sputtering resulted in dewetting of the film with subsequent formation of spherical NPs. This was followed by embedding of the NPs in the modified PET due to the thermodynamic driving forces involved. The surface and interface morphologies were studied using atomic force microscopy and cross-sectional transmission electron microscopy. X-ray photoelectron spectroscopy was used to study the chemical changes in the system upon irradiation. The optical properties were studied by diffuse reflectance UV-Vis spectroscopy and PL using a 325 nm He-Cd laser. The red shift of the SPR absorption and the blue shift of the PL emission have been correlated with the surface morphology. The blue PL emission bands at around 3.0 eV are in good agreement with the literature with respect to the morphological changes and the blue shift is attributed to compressive strain on the embedded Au NPs. Enhancement of the SERS signals is observed and found to be correlated with the SPR response of the Au nanostructures. The SERS analyses indicate that MO molecules may be adsorbed with different orientations on these surfaces i.e. Au NPs located on the surface or embedded in the modified PET. These polymeric substrates modified by NPs can have a potential application in solid-state light emitting devices and can be applied in SERS based sensors for the detection of organic compounds.

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“…According to the Drude-Lorentz mode, the third layer is the Au film with refractive index as following [46]:…”

Section: Theoretical Model and Methodsmentioning

confidence: 99%

Giant Goos-Hänchen Shifts in Au-ITO-TMDCs-Graphene Heterostructure and Its Potential for High Performance Sensor

Han

Pan

et al. 2020

Sensors

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In order to improve the performance of surface plasmon resonance (SPR) biosensor, the structure based on two-dimensional (2D) of graphene and transition metal dichalcogenides (TMDCs) are proposed to greatly enhance the Goos-Hänchen (GH) shift. It is theoretically proved that GH shift can be significantly enhanced in SPR structure coated with gold (Au)-indium tin oxide (ITO)-TMDCs-graphene heterostructure. In order to realize high GH shifts, the number of TMDCs and graphene layer are optimized. The highest GH shift (−801.7 λ) is obtained by Au-ITO-MoSe2-graphene hybrid structure with MoSe2 monolayer and graphene bilayer, respectively. By analyzing the GH variation, the index sensitivity of such configuration can reach as high as 8.02 × 105 λ/RIU, which is 293.24 times of the Au-ITO structure and 177.43 times of the Au-ITO-graphene structure. The proposed SPR biosensor can be widely used in the precision metrology and optical sensing.

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Blue-Shifted SPR of Au Nanoparticles with Ordering of Carbon by Dense Ionization and Thermal Treatment

Cited by 45 publications

References 56 publications

One-Pot Synthesis of a Three-Dimensional Au-Decorated Cellulose Nanocomposite as a Surface-Enhanced Raman Scattering Sensor for Selective Detection and in Situ Monitoring

One-Pot Synthesis of a Three-Dimensional Au-Decorated Cellulose Nanocomposite as a Surface-Enhanced Raman Scattering Sensor for Selective Detection and in Situ Monitoring

Optical and surface enhanced Raman scattering properties of Au nanoparticles embedded in and located on a carbonaceous matrix

Giant Goos-Hänchen Shifts in Au-ITO-TMDCs-Graphene Heterostructure and Its Potential for High Performance Sensor

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