Simulation of Free-Standing Geometrical Gold Nanoantenna with Variable Post Height for Enhanced Raman Spectroscopy

2013 ◽  
Author(s):  
Bo-Kai Chao ◽  
Shih-Che Lin ◽  
Jia-Han Li ◽  
Chun-Hway Hsueh
Keyword(s):  
Raman Spectroscopy ◽  
Free Standing

scholarly journals Probing the Intrinsic Properties of Exfoliated Graphene: Raman Spectroscopy of Free-Standing Monolayers

Nano Letters ◽  
2009 ◽  
Vol 9 (1) ◽  
pp. 346-352 ◽  
Author(s):  
Stéphane Berciaud ◽  
Sunmin Ryu ◽  
Louis E. Brus ◽  
Tony F. Heinz
Keyword(s):  
Raman Spectroscopy ◽  
Intrinsic Properties ◽  
Free Standing ◽  
Exfoliated Graphene

Coupled Vibrations in Index-Identified Carbon Nanotubes

2014 ◽  
Vol 1700 ◽  
pp. 69-77 ◽  
Author(s):  
Dmitry Levshov ◽  
Thierry Michel ◽  
Matthieu Paillet ◽  
Xuan Tinh Than ◽  
Huy Nam Tran ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
High Resolution ◽  
Electron Diffraction ◽  
Electron Spectroscopy ◽  
Free Standing ◽  
Transmission Electron ◽  
Resonant Raman ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

ABSTRACTCombining high resolution transmission electron spectroscopy, electron diffraction, and resonant Raman spectroscopy experiments on the same suspended (free-standing) individual carbon nanotubes is the ultimate approach to relate unambiguously the structure and the intrinsic phonon features of these nano-systems.By using this approach, the effect of coupling between nanotubes on the phonons is investigated in two model nano-systems: (i) a bundle of two non-identical SWNTs (inhomogeneous dimer), (ii) double-walled carbon nanotubes.

Free-standing gold elliptical nanoantenna with tunable wavelength in near-infrared region for enhanced Raman spectroscopy

2016 ◽  
Vol 122 (7) ◽  
Author(s):  
Shih-Che Lin ◽  
Nahla A. Hatab ◽  
Baohua Gu ◽  
Bo-Kai Chao ◽  
Jia-Han Li ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Near Infrared ◽  
Infrared Region ◽  
Free Standing ◽  
Near Infrared Region ◽  
Tunable Wavelength

Graphene as an anti-corrosion coating layer

2015 ◽  
Vol 180 ◽  
pp. 495-509 ◽  
Author(s):  
Line Kyhl ◽  
Sune Fuglsang Nielsen ◽  
Antonija Grubišić Čabo ◽  
Andrew Cassidy ◽  
Jill A. Miwa ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Graphene Layer ◽  
Room Temperature ◽  
Crystal Surface ◽  
Hexagonal Lattice ◽  
Chemical Vapour ◽  
Ambient Atmosphere ◽  
Free Standing ◽  
Corrosion Properties ◽  
Hot Surface

Graphene, a single layer of carbon atoms arranged in an aromatic hexagonal lattice, has recently drawn attention as a potential coating material due to its impermeability, thermodynamic stability, transparency and flexibility. Here, the effectiveness of a model system, a graphene covered Pt(100) surface, for studying the anti-corrosion properties of graphene, has been evaluated. Chemical vapour deposition techniques were used to cover the single crystal surface with a complete layer of high-quality graphene and the surface was characterised after exposure to corrosive environments with scanning tunnelling microscopy (STM) and Raman spectroscopy. Graphene covered Pt samples were exposed to: (i) ambient atmosphere for 6 months at room temperature and 60 °C for 75 min, (ii) Milli-Q water for 14 hours at room temperature and 60 °C for 75 min, and (iii) saltwater (0.513 M NaCl) for 75 min at room temperature and 60 °C. STM provides atomic resolution images, which show that the graphene layer and the underlying surface reconstruction on the Pt(100) surface remain intact over the majority of the surface under all conditions, except exposure to saltwater when the sample is kept at 60 °C. Raman spectroscopy shows a broadening of all graphene related peaks due to hybridisation between the surface Pt d-orbitals and the graphene π-bands. This hybridisation also survives exposure to all environments except saltwater on the hot surface, with the latter leading to peaks more representative of a quasi free-standing graphene layer. A mechanism explaining the corrosive effect of hot saltwater is suggested. Based on these experiments, graphene is proposed to offer protection against corrosion in all tested environments, except saltwater on a hot surface, and Raman spectroscopy is proposed as a useful method for indirectly assessing the chemical state of the Pt surface.

Nanoscale Energetics with Carbon Nanotubes

2003 ◽  
Vol 800 ◽  
Author(s):  
Yubing Wang ◽  
Sanjay Malhotra ◽  
Zafar Iqbal
Keyword(s):  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Hydrogen Adsorption ◽  
Chemical Vapor ◽  
Hydrogen Uptake ◽  
Single Wall Carbon Nanotubes ◽  
Free Standing ◽  
Catalytic Nanoparticles ◽  
Coated Membranes ◽  
Carbon Arc

AbstractSingle wall carbon nanotubes (SWNTs) with diameters below 1 nm prepared by chemical vapor deposition (CVD), and with diameters of 1.3 nm and higher prepared by laser ablation and carbon-arc techniques, were electrochemically functionalized with hydrogen and nitro groups, and chemically derivatized with 4-nitroaniline. Hydrogen adsorption on SWNTs was carried out in the presence or absence of electrodeposited catalytic nanoparticles of magnesium. SWNTs deposited on Teflon-coated membranes by vacuum filtration and lifted off as free-standing nanopaper, were used as the electrodes for electrochemical functionalization reactions. Hydrogen uptake on the nanotubes was characterized by micro-Raman spectroscopy, thermogravimetry and thermopower measurements. Electrochemically-induced functionalization with −NO2 groups on metallic, laser-synthesized SWNTs was clearly detected by Raman spectroscopy. Chemical functionalization was achieved on CVD-produced SWNTs by acidification to form −COOH groups followed by reaction with thionyl chloride and then with 4-nitroaniline. Photoacoustic effects that are likely to be precursors of photo-induced initiation of energetic reactions, were observed to occur at varying laser intensities for these materials in experiments using a pulsed Nd-YAG laser emitting at 532 nm.

Free-standing Ag triangle arrays a configurable vertical gap for surface enhanced Raman spectroscopy

2017 ◽  
Vol 28 (38) ◽  
pp. 385401 ◽  
Author(s):  
Kuanguo Li ◽  
Yong Wang ◽  
Kang Jiang ◽  
Yuan Ren ◽  
Yanqiu Dai ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Surface Enhanced Raman Spectroscopy ◽  
Free Standing ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Vertical Gap

Raman spectroscopy of GaN nucleation and free-standing layers grown by hydride vapor phase epitaxy on oxidized silicon

2003 ◽  
Vol 83 (4) ◽  
pp. 629-631 ◽  
Author(s):  
E. V. Konenkova ◽  
Yu. V. Zhilyaev ◽  
V. A. Fedirko ◽  
D. R. T. Zahn
Keyword(s):  
Raman Spectroscopy ◽  
Vapor Phase ◽  
Vapor Phase Epitaxy ◽  
Hydride Vapor Phase Epitaxy ◽  
Free Standing
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