New strategies for surface-enhanced Raman scattering at transition-metal interfaces: thickness-dependent characteristics of electrodeposited Pt-group films on gold and carbon

Article Abstract:

The surface-enhanced Raman scattering (SERS) characteristics of rhodium films electrodeposited onto a SERS-active gold substrate were studied as a function of overlayer thickness, employing carbon monoxide and thiocyanate as chemisorbate probes in aqueous solution. Although the adsorbate Raman signals observed for ultrathin Rh layers come from the gold template, a substantial and possibly dominant SERS component for thicker films was determined as emanating instead from the transition-metal overlayer itself.

Carbon, Transition metals, Raman effect

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Enhancement of photochromism and electrochromism in MoO3/Au and MoO3/Pt thin films

Article Abstract:

A study was conducted to improve the photochromism and electrochromism in MoO3/Au and MoO3/Pt thin films. The films were made by vacuum evaporation of high-purity powder onto conductive SnO2-coated glass substrates. A high-pressure mercury lamp was utilized to support band-gap excitation. Experimental results indicated that the coating of MoO3 with a thin layer of gold or platinum increased the efficiencies of the ultraviolet and visible-light photochromism.

Molybdenum compounds, Photochromic materials

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Microstructures of electrochromic MoO3 thin films colored by injection of different cations

Article Abstract:

A study was conducted to analyze the microstructural characteristics of amorphous MoO3 thin films colored by injection of various cations using Raman microscopy. The thin films were obtained by the vacuum deposition of high-purity MoO3. Results indicated that the coloration means affected the microstructure of molybdenum bronze. In addition, the size of the cations through electrochromic processes had negligible effect on the microstructure of the films.

Cations, Amorphous semiconductors

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