Electrode size dependence of piezoelectric response of lead zirconate titanate thin films measured by double beam laser interferometry

The electrode size dependence of the effective large signal piezoelectric response coefficient (d(33,f)) of lead zirconate titanate (PZT) thin films is investigated by using double beam laser interferometer measurements and finite element modeling. The experimentally observed electrode size dependence is shown to arise from a contribution from the substrate. The intrinsic PZT contribution to d(33,f) is independent of electrode size and is equal to the theoretical value derived assuming a rigid substrate. The substrate contribution is strongly dependent on the relative size of the electrode with respect to the substrate thickness. For electrode sizes larger than the substrate thickness, the substrate contribution is positive and for electrode sizes smaller than the substrate thickness, the substrate contribution is negative. In the case of silicon substrates, if the electrode size is equal to the substrate thickness, the substrate contribution vanishes, and the measured value of d(33,f) is equal to the theoretical value under the rigid substrate assumption. (C) 2013 AIP Publishing LLC.This is the publisher’s final pdf. The published article is copyrighted by AIP Publishing LLC and can be found at: http://www.aip.org/. Copyright Statement Basic Permissions Limited license IS GRANTED to individuals accessing this document and its component documents and/or files for the following personal, noncommercial uses: 1. Retrieving or printing a copy of any document or file mounted on this server 2. Establishing a link or links to any document or file mounted on this server Individuals accessing this document and its component documents and/or files are NOT GRANTED license to: 1. Alter a copy of any retrieved or printed document or file from this server 2. Distribute a copy (electronic or otherwise) of any document or file from this server without permission from the American Institute of Physics (direct requests to [email protected] 3. Charge for a copy (electronic or otherwise) of any document or file from this server. This server and its contents, unless otherwise indicated, are the property of the American Institute of Physics

Self-Organization and Regulation of Intrinsically Disordered Proteins with Folded N-Termini

How do mostly disordered proteins coordinate the specific assembly of very large signal transduction protein complexes? A newly emerging hypothesis may provide some clues towards a molecular mechanism

Progress towards a public chemogenomic set for protein kinases and a call for contributions

Protein kinases are highly tractable targets for drug discovery. However, the biological function and therapeutic potential of the majority of the 500+ human protein kinases remains unknown. We have developed physical and virtual collections of small molecule inhibitors, which we call chemogenomic sets, that are designed to inhibit the catalytic function of almost half the human protein kinases. In this manuscript we share our progress towards generation of a comprehensive kinase chemogenomic set (KCGS), release kinome profiling data of a large inhibitor set (Published Kinase Inhibitor Set 2 (PKIS2)), and outline a process through which the community can openly collaborate to create a KCGS that probes the full complement of human protein kinases

Micron size optically altered regions and nanocrystal formation in femtosecond laser processed CdSxSe1−x doped silicate glass

Femtosecond laser processing of a CdSxSe1−x doped borosilicate glass by a 1 kHz femtosecond laser with pulse energies up to 100 μJ gave rise to smooth altered micron-size regions within the glass. The fs-laser exposed glass formed nanocrystals when heat treated above the glass transition temperature. The fluorescence intensities in the non-resonant to resonant transition regimes indicated no differences in size or preference for formation of nanocrystals within the laser exposed regions

Mesoscopic photonic structures in glasses by femtosecond-laser fashioned confinement of semiconductor quantum dots

Optically tunable mesoscale structures offer unparalleled potential for photonic device applications. Here, we report the creation of composite photonic structures consisting of CdS xSe1−x quantum dots (QDs) customized within lines, first written in a glass by femtosecond laser pulses. CdS xSe1−x-doped borosilicate glasses were pulsed with a fs-laser using a 473 kHz repetition rate to create chemically distinct microscopic regions. Upon further heat treatment, these regions served as “micro-crucibles” within which quantum dots were precipitated exclusively. These results open prospects of developing other semiconductor doped glasses for versatile photonic structures useful over broader optical wavelengths

Mesoscopic photonic structures in glasses by femtosecond-laser fashioned confinement of semiconductor quantum dots

Optically tunable mesoscale structures offer unparalleled potential for photonic device applications. Here, we report the creation of composite photonic structures consisting of CdS xSe1−x quantum dots (QDs) customized within lines, first written in a glass by femtosecond laser pulses. CdS xSe1−x-doped borosilicate glasses were pulsed with a fs-laser using a 473 kHz repetition rate to create chemically distinct microscopic regions. Upon further heat treatment, these regions served as “micro-crucibles” within which quantum dots were precipitated exclusively. These results open prospects of developing other semiconductor doped glasses for versatile photonic structures useful over broader optical wavelengths

Micron size optically altered regions and nanocrystal formation in femtosecond laser processed CdSxSe1−x doped silicate glass

Femtosecond laser processing of a CdSxSe1−x doped borosilicate glass by a 1 kHz femtosecond laser with pulse energies up to 100 μJ gave rise to smooth altered micron-size regions within the glass. The fs-laser exposed glass formed nanocrystals when heat treated above the glass transition temperature. The fluorescence intensities in the non-resonant to resonant transition regimes indicated no differences in size or preference for formation of nanocrystals within the laser exposed regions