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A Compact, Low-Power Cantilever-Based Sensor Array for Chemical Detection

Description: A compact and low-power cantilever-based sensor array has been developed and used to detect various vapor analytes. This device employs sorptive polymers that are deposited onto piezoresistive cantilevers. We have successfully detected several organic vapors, representing a breadth of chemical properties and over a range of concentrations. Comparisons of the polymer/vapor partition coefficient to the cantilever deflection responses show that a simple linear relationship does not exist, emphasiz… more
Date: February 22, 2007
Creator: Loui, A; Ratto, T; Wilson, T; Mukerjee, E; Hu, Z; Sulchek, T et al.
Partner: UNT Libraries Government Documents Department
open access

Crystal-field level inversion in lightly Mn-doped Sr3Ru2O7

Description: Sr3(Ru1-xMnx)2O7, in which 4d-Ru is substituted by the more localized 3d-Mn, is studied by x-ray dichroism and spin-resolved density functional theory. We find that Mn impurities do not exhibit the same 4+ valence of Ru, but act as 3+ acceptors; the extra eg electron occupies the in-plane 3dx2-y2 orbital instead of the expected out-of-plane 3d3z2-r2. We propose that the 3d-4d interplay, via the ligand oxygen orbitals, is responsible for this crystal-field level inversion and the material's tran… more
Date: January 15, 2008
Creator: Hossain, M. A.; Hu, Z.; Haverkort, M. W.; Burnus, T.; Chang, C. F.; Klein, S. et al.
Partner: UNT Libraries Government Documents Department
open access

Multiple Input Microcantilever Sensor with Capacitive Readout

Description: A surface-micromachined MEMS process has been used to demonstrate multiple-input chemical sensing using selectively coated cantilever arrays. Combined hydrogen and mercury-vapor detection was achieved with a palm-sized, self-powered module with spread-spectrum telemetry reporting.
Date: March 11, 1999
Creator: Britton, C. L., Jr.; Brown, G. M.; Bryan, W. L.; Clonts, L. G.; DePriest, J. C.; Emergy, M. S. et al.
Partner: UNT Libraries Government Documents Department
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