Ge, B, P-doped silica glass films are widely used as optical waveguides because of their low losses and inherent compatibility with silica optical fibers. These films were etched by ICP !inductively coupled plasma" with chrome etch masks, which were patterned by reactive ion etching !RIE" using chlorine-based gases. In some cases, the etched surfaces of silica glass were very rough !root-mean s...

Two current technologies used in biosensor development are very promising: 1. The sol-gel process of making microporous glass at room temperature, and 2. Using a fluorescent compound that undergoes fluorescence quenching in response to a specific analyte. These technologies have been combined to produce an iron biosensor. To optimize the iron (II or III) specificity of an iron biosensor, pyover...

Ion currents through three types of rectifying nanoporous structures are studied and compared for the first time: conically shaped polymer nanopores, glass nanopipettes, and silicon nitride nanopores. Time signals of ion currents are analyzed by power spectrum. We focus on the low-frequency range where the power spectrum magnitude scales with frequency, f, as 1/f. Glass nanopipettes and polymer...

Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Ya Chen Name of the doctoral dissertation Silver nanoparticles embedded in glass by ion exchange method for biosensor applications Publisher School of Electrical Engineering Unit Department of Microand Nanosciences Series Aalto University publication series DOCTORAL DISSERTATIONS 125/2012 Field of research Photonics Manuscript...

A diffractive structure was obtained by directly scanning on a glass substrate in an area of 25×20 μm by use of focused ion beam (FIB) with energy of 30 keV and beam current of 1 nA. It is a one-step, and pattern transfer free process. Ripples with regular shape and geometric size were observed on glass after FIB scanning. The ripples can be used as diffractive grating. Wavelength and amplitude...

Based on the framework of long-range empirical formulas, the interatomic potentials were constructed for the Ni-Nb-Mo (fcc-bcc-bcc) and Ni-Zr-Mo (fcc-hcp-bcc) ternary metal systems. Applying the constructed potentials, atomistic simulations were performed to predict the energetically favored glass formation regions (GFRs) in the respective composition triangles of the systems. In addition, the ...

Alkali ion charge transport has been studied in a series of mixed glass former lithium borophosphate glasses of composition 0.33Li(2)O + 0.67[xB(2)O(3) + (1 - x)P(2)O(5)]. The entire concentration range, 0.0 ≤ x ≤ 1.0, from pure glassy Li(2)P(4)O(11) to pure glassy Li(2)B(4)O(7) has been examined while keeping the molar fraction of Li(2)O constant. Electrical conductivity measurements and nucle...