Galaxies with Background QSOs, I: A Search for Strong Galactic H-alpha Lines

Posted by klaurent Chicago

Kavli Affiliate: Mark SubbaRao | Summary:A search for emission lines in foreground galaxies in quasar spectra (z(gal) < z(QSO)) of the Sloan Digital Sky Survey (SDSS) data release 5 (DR5) reveals 23 examples of quasars shining through low redshift, foreground galaxies at small impact parameters (< 10 kpc). About 74,000 quasar spectra were examined by […]


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Quantum Size Effects on the Chemical Sensing Performance of Two-Dimensional Semiconductors

Posted by klaurent Berkeley

Kavli Affiliate: Ali Javey | Summary:We investigate the role of quantum confinement on the performance of gas sensors based on two-dimensional InAs membranes. Pd-decorated InAs membranes configured as H2 sensors are shown to exhibit strong thickness dependence, with ~100x enhancement in the sensor response as the thickness is reduced from 48 to 8 nm. Through […]


Continue.. Quantum Size Effects on the Chemical Sensing Performance of Two-Dimensional Semiconductors