Yan Chen Chen

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Laser desorption time-of-flight mass spectra of peptides and proteins, as well as of lower molecular weight analytes, have been obtained by using a pulsed nitrogen UV laser (337 nm) to irradiate mixtures of 2-150 microns graphite particles and solutions of the analytes in glycerol. Protonated analytes as well as abundant alkali cation adducts were observed.(More)
Adv. Mater. 2010, 22, 597–601 2010 WILEY-VCH Verlag Gm T IO N Surfaces that exhibit superhydrophobic properties have attracted much attention for their use in a wide range of applications, such as electrowetting and self-cleaning. Wenzel and Cassie and Baxter have proposed models that consider the roles of the surface area and trapped air, respectively, to(More)
In this study ALOS multispectral images were used to compare landcover patterns in three study areas, namely Tokyo, Kyoto, and Taipei, of different degrees of urbanization. Shannon diversity index at cell level was used as a landscape metric for landcover pattern analysis. Both the landcover type richness and evenness are low in most of the Tokyo study area(More)
Processing conditions such as those in the gravity cast and extruded metal-matrix composites (MMC) introduce a degree of anisotropy that must be taken into consideration in applications requiring high performance isotropic mechanical properties. The presence of anisotropy in composites can be viewed as the difference in the elastic modulus from one(More)
We have applied a line UV Raman, Rayleigh, and laser-induced predissociation fluorescence technique for measurement of turbulent hydrocarbon flames. The species concentration of CO(2), O(2), CO, N(2), CH(4), H(2)O, OH, and H(2) and the temperature are measured instantaneously and simultaneously along a line of 11.4 mm, from which the gradients with respect(More)
The analysis of compounds separated by thin-layer chromatography (TLC) by surface-assisted laser desorption ionization (SALDI) mass spectrometry has been demonstrated. The compounds are analyzed from the surface of the intact TLC plate, and the preparation of the TLC plate is rapid and robust: the gel surface is covered with 2 microns activated carbon(More)
We report the operation of a photopumped blue Znx8Cdy8Mg12x82y8Se/ZnxCdyMg12x2ySe separate confinement heterostructure single quantum well laser grown lattice matched to InP with a relatively thick quaternary quantum well ~;50 Å!. Laser emission at 492 nm in the blue was observed. The lasing linewidth is about 5 nm. Based on the temperature dependency of(More)
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