A wavelength-interrogated surface plasmon resonance (SPR) sensor based on a nanoporous gold (NPG) film has been fabricated for the sensitive detection of trace quantities of benzo[a]pyrene (BaP) in water. The large-area uniform NPG film was prepared by a two-step process that includes sputtering deposition of a 60-nm-thick AuAg alloy film on a glass substrate and chemical dealloying of the allo...

The goal of this work is to research the effect different Au-Ag ratios on homogeneity bimetal alloys. Thin films silver (Ag)-gold (Au) alloy were produced using Vaksis Thermal Evaporator system and quartz crystal microbalance detector at gold additive ratios. Micro beam X-Ray fluorescence spectrometer was used calculate bimetallic Ag-Au thin production with concentration values. It seen that ca...

The influence of the composition and electropolymerization conditions upon the propulsion of new template-prepared polymer-based bilayer microtubular microbots is described. The effects of different electropolymerized outer layers, including polypyrrole (PPy), poly(3,4-ethylenedioxythiophene) (PEDOT), polyaniline (PANI), and of various inner catalytic metal surfaces (Ag, Pt, Au, Ni-Pt alloy), u...

There are concerns that tooth bleaching agents may adversely affect dental materials. The aim of this study was to test the hypothesis that increasing concentrations of hydrogen peroxide (HP) are more effective than water at increasing metal ion release from two typical dental casting alloys during bleaching. Discs (n = 28 for each alloy) were prepared by casting and heat treated to simulate a ...

As the second part to a paper presented at the 2004 SMTA Pan Pacific Symposium, this paper further summarizes the results from technical qualification of the Ni/Pd/Au process. Whereas the previous paper examined the wire bonding capabilities of this surface finish, this second paper focuses specific attention to BGA applications. In these investigations, the solder joint integrity is measured u...

The purpose of this study was to examine the dose enhancement at bone-implant interfaces from scattered radiation during simulated head and neck radiotherapy. Three cylindric implant systems with different compositions (pure titanium, titanium-aluminum-vanadium alloy, titanium coated with hydroxyapatite) and a high gold content transmandibular implant system (gold-copper-silver alloy) were stud...

OBJECTIVES To evaluate the effects of different post materials on the stress distribution in an endodontically treated maxillary incisor. MATERIALS AND METHODS A pseudo 3-dimensional finite element model was created in a labiolingual cross-sectional view of a maxillary central incisor and modified according to five posts with different physical properties consisting stainless steel, titanium,...

R. Perić, ,,PERIĆ&PERIĆ“ & Co. d.o.o., Požarevac, Serbia; Z. Karastojković, Technical College, Novi Beograd, Serbia; Z. Kovačević, Institute for Testing of Materials, Beograd, Serbia; Z. Janjušević, Institute for Nuclear and other Mineral Raw Materials, Belgrade, Serbia; D. Gusković, Univesity of Belgrade, Technical Faculty Bor, Bor, Serbia Numerous gold alloys posses the ability for thermal ha...

In this article, it is shown that the efficiency of an electrochemical aptasensing device is influenced by the use of different nanoparticles (NPs) such as gold nanoparticles (Au), silver nanoparticles (Ag), hollow gold nanospheres (HGN), hollow silver nanospheres (HSN), silver–gold core shell (Ag@Au), gold–silver core shell (Au@Ag), and silver–gold alloy nanoparticles (Ag/Au). Among these nano...