The Optical Properties of Au/Ag Nanoparticles Coated with Diamond-Like Carbon Films

2012 ◽  
Vol 569 ◽  
pp. 39-43 ◽  
Author(s):  
Nan Yu Ma ◽  
Yu Jie Huang ◽  
Mu Sen Li
Keyword(s):  
Near Infrared ◽  
Surface Effect ◽  
Carbon Films ◽  
Noble Metal Nanoparticles ◽  
Diamond Like Carbon ◽  
Ag Nps ◽  
Surface Plasma Resonance ◽  
Visible Absorption ◽  
Optical Phenomenon ◽  
Biological Compatibility

Abstract. Noble metal nanoparticles have prominent surface effect, quantum size effect and active outer-shell electrons, they cause these particles to present unusual optical phenomenon, display the strong local surface plasma resonance (LSPR) effect. DLC films have good biological compatibility, good wear resistance and corrosion-resisting, it also has high transmissibility in the visible and near-infrared region. A new LSPR interface between diamond-like carbon films and the Au/Ag NPs was formed by Plasma Enhanced Chemical Vapor Deposition (PECVD), The optical and electrical properties of the samples were studied with ultraviolet-visible absorption spectrophotometer and Raman spectrometer. The results indicate that their transmittance decreased with the increase of the film thickness.

The Optical Property and Sensitivity of Ag Nanoparticles Deposited Ultra-Thin Diamond-Like Carbon Films

2013 ◽  
Vol 803 ◽  
pp. 222-225
Author(s):  
Hua Song ◽  
Nan Yu Ma ◽  
Jun Wei Di ◽  
Mu Sen Li
Keyword(s):  
Ag Nanoparticles ◽  
Near Infrared ◽  
Resonance Effect ◽  
Chemical Vapor ◽  
Carbon Films ◽  
Infrared Range ◽  
Diamond Like Carbon ◽  
Ag Nps ◽  
Surface Plasma Resonance ◽  
Biological Compatibility

Ag nanoparticles (NPs) had most prominent local surface plasma resonance effect (LSPR) among the all metals. Diamond-like carbon (DLC) film had good biological compatibility, wear resistance, corrosion-resisting and high transmission ability in the visible and near-infrared range. Since the Ag NPs were easily oxidized in air,a new LSPR interface between them and an ultra-thin DLC films was formed by means of a plasma enhanced chemical vapor deposition (PECVD). The morphologies and properties of the Ag NPs deposited ultra-thin DLC films were studied by using Raman spectrometer, X-ray photoelectron spectrometer (XPS) , field emission scanning electron microscope (FESEM) and atomic force microscope (AFM) and so on. And the optical tramsmission sensitivity of the new LSPR interface was also examined. The results indicated that the DLC films deposited in a shorter time had a higher sp3bond content of carbon atoms and more sensitive to refractive index of surrounding media. Moreover, to obtain the optimal morphologies and the sensing property, the deposition time for forming the DLC films should be controlled within 30 seconds.

Study on the Preparation of Silver Nanoparticles Coated with Diamond-Like Carbon Film and their Properties

2013 ◽  
Vol 745-746 ◽  
pp. 60-65
Author(s):  
Nan Yu Ma ◽  
Dan Zeng ◽  
Yu Jie Huang ◽  
Jun Wei Di ◽  
Mu Sen Li
Keyword(s):  
Deposition Time ◽  
Near Infrared ◽  
Resonance Effect ◽  
Carbon Film ◽  
Chemical Vapor ◽  
Diamond Like Carbon ◽  
Ag Nps ◽  
Surface Plasma Resonance ◽  
Dlc Film ◽  
Biological Compatibility

Ag nanoparticles (NPs) have prominent local surface plasma resonance effect (LSPR), and Ag NPs exhibit sharpest and strongest bands among all metals. Diamond-like carbon (DLC) film have good biological compatibility and also have high transmissibility in the visible and near-infrared region. A new LSPR interface between Ag NPs and ultra-thin DLC film was formed by Plasma Enhanced Chemical Vapor Deposition. The morphologies and properties of the Ag NPs coated with DLC film were studied with SEM and AFM. The results indicated that the thickness of DLC film increased with the deposition time. LSPR peak became sharper after depositing for 1 or 2 min. DLC film was prior to nucleate on the surface of Ag NPs, and it has high content of sp2 bonds near the interface. The sensitivity of new LSPR interface deposited for 20s was about the half of the sensitivity of bare Ag NPs and the sensitivity significantly decreased with deposition time. This result is helpful to understand the behavior of the new LSPR interface and to improve its sensitivity.

Raman Analysis of Diamond-Like Carbon Films Deposited onto Corrosion Resistant Alloys Used for Coronary Stent Fabrication

2007 ◽  
Vol 537-538 ◽  
pp. 277-284 ◽  
Author(s):  
M. Veres ◽  
Sara Tóth ◽  
M. Füle ◽  
János Dobránszky ◽  
László Major ◽  
...  
Keyword(s):  
Near Infrared ◽  
Chemical Vapor ◽  
Carbon Films ◽  
Coronary Stent ◽  
Diamond Like Carbon ◽  
Electrochemical Polishing ◽  
Raman Analysis ◽  
Corrosion Resistant ◽  
Amorphous Carbon Films ◽  
Pre Treatment

The structure of diamond-like carbon thin films prepared by radio frequency chemical vapor deposition onto the surface of different corrosion resistant alloys (304, 316L and Iconel 617) used for coronary stent fabrication was investigated by Raman spectroscopy excited by visible (488 nm) and near-infrared (785 nm) light. The effect of electrochemical polishing of the alloy surface and that of Ar+ ion pre-treatment on the structure of the forming film was also studied in case of substrate made of 316L material. It was found that in spite of simultaneous preparation the character of the formed amorphous carbon films depends on the type of the alloy. The layer developed on the surface of Fe-rich stainless steels (316L and 304) showed the most diamond-like character, while the Ni-rich Inconel alloy promoted the formation of layer with high graphitic sp2 cluster content. The Ar+ pre-treatment enhanced the adhesion and the diamond-like properties of the film while the electrochemical polishing was found to be unfavorable concerning the diamond-like character of the layer.

Field Emission from Pure and Nitrogen-Incorporated Diamond-Like-Carbon Films

1996 ◽  
Vol 06 (C5) ◽  
pp. C5-91-C5-95 ◽  
Author(s):  
S. Lee ◽  
B. Chung ◽  
T.-Y. Ko ◽  
H. Cho ◽  
D. Jeon ◽  
...  
Keyword(s):  
Field Emission ◽  
Carbon Films ◽  
Diamond Like Carbon

Microstructure Evolution Induced by Ultraviolet Light Irradiation in Ti-Si Codoped Diamond-like Carbon films

2014 ◽  
Vol 29 (9) ◽  
pp. 941
Author(s):  
JIANG Jin-Long ◽  
WANG Qiong ◽  
HUANG Hao ◽  
ZHANG Xia ◽  
WANG Yu-Bao ◽  
...  
Keyword(s):  
Ultraviolet Light ◽  
Microstructure Evolution ◽  
Carbon Films ◽  
Light Irradiation ◽  
Diamond Like Carbon ◽  
Ultraviolet Light Irradiation

An Study of Influence of Imperfections on the Delamination of Diamond-Like Carbon Films

2002 ◽  
Vol 719 ◽  
Author(s):  
Myoung-Woon Moon ◽  
Kyang-Ryel Lee ◽  
Jin-Won Chung ◽  
Kyu Hwan Oh
Keyword(s):  
Cross Sections ◽  
Focused Ion Beam ◽  
Imaging System ◽  
Ion Beam ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Glass Substrates ◽  
Atomic Force ◽  
Initiation And Propagation

AbstractThe role of imperfections on the initiation and propagation of interface delaminations in compressed thin films has been analyzed using experiments with diamond-like carbon (DLC) films deposited onto glass substrates. The surface topologies and interface separations have been characterized by using the Atomic Force Microscope (AFM) and the Focused Ion Beam (FIB) imaging system. The lengths and amplitudes of numerous imperfections have been measured by AFM and the interface separations characterized on cross sections made with the FIB. Chemical analysis of several sites, performed using Auger Electron Spectroscopy (AES), has revealed the origin of the imperfections. The incidence of buckles has been correlated with the imperfection length.

Low Temperature Internal Friction of Diamond-Like Carbon Films

2002 ◽  
Author(s):  
Xiao Liu ◽  
D. M. Photiadis ◽  
J. A. Bucaro ◽  
J. F. Vignola ◽  
B. H. Houston ◽  
...  
Keyword(s):  
Low Temperature ◽  
Internal Friction ◽  
Carbon Films ◽  
Diamond Like Carbon
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