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Displaying 501 - 525 of 1445

Cracking and delamination behaviors of photovoltaic backsheet after accelerated laboratory weathering

September 23, 2015

Author(s)

Chiao-Chi Lin, Yadong Lyu, Donald L. Hunston, Jae Hyun Kim, Kai-Tak Wan, Deborah S. Jacobs, Xiaohong Gu

The channel crack and delamination phenomena that occurred during tensile tests were utilized to study surface cracking and delamination properties of a multilayered backsheet. A model sample of commercial PPE (polyethylene terephthalate (PET)/PET/ethylene

iNEMI Project on Automotive Electronic Material Challenges

September 3, 2015

Author(s)

Yaw S. Obeng

Automobiles are incorporating more and more electronics from various industry sectors that have not been optimally designed for use inside the vehicle passenger compartment. Reliability and cost are two key considerations when incorporating traditional

Heterogeneity and length scale effects in PEG-based hydrogels

August 10, 2015

Author(s)

Brian G. Bush, Jenna M. Shapiro, Frank W. DelRio, Robert F. Cook, Michelle L. Oyen

Colloidal-probe spherical indentation load-relaxation experiments are conducted on poly(ethylene glycol) (PEG) hydrogel materials to quantify the steady-state mechanical properties and time-dependent transport properties in a single experiment. A probe

Atomically thin layers of B-N-C-O with tuneable composition

July 31, 2015

Author(s)

Ann C. Chiaramonti Debay, Birol Ozturk, Andres de Luna Bugallo, Eugene Panaitescu, Fangze Liu, Anthony Vargas, Xueping Jiang, Ozgur Yavuzcetin, Majed Alnaji, Yongui Zhao, Nicholas King, Madan Dubey, Saroj Nayak, Srinivas Sridhar, Swastik Kar

Atomically thin ternary compounds/alloys of boron, nitrogen and carbon have generated significant excitement as they provided the first instance of a tuneable 2D material that affords rich physics as well applications potentials. Interestingly, the crucial

Effects of Detector Dead-time on Quantitative Analyses Involving Boron and Multi-Hit Detection Events in Atom Probe Tomography

July 29, 2015

Author(s)

Frederick Meisenkothen, Eric B. Steel, T. J. Prosa, Karen T. Henry, Ratna P. Kolli

In atom probe tomography (APT), some elements tend to field evaporate preferentially in multi-hit detection events. Boron (B) is one such element. It is thought that a large fraction of the B signal may be lost during data acquisition and is not reported

Use of Bayesian Statistics to Improve Optical Measurement Uncertainty by Combined Multi-Tool Metrology

June 25, 2015

Author(s)

Nien F. Zhang, Richard M. Silver, Hui Zhou, Bryan M. Barnes

Recently, there has been significant research investigating new optical technologies for dimensional metrology of features 32 nm in critical dimension and smaller. When modeling optical measurements a library of curves is assembled through the simulation

HIGH-Q ON-CHIP MICROWAVE RESONATOR FOR SENSITIVE PERMITTIVITY DETECTION IN NANOLITER VOLUMES

June 21, 2015

Author(s)

A Padilla, Alex Watson, Christopher L. Holloway, James Booth

This work presents the design, fabrication and characterization results for a thick film (6µm Cu), coplanar waveguide (CPW) resonator operating at 2.2GHz with a high Q (177), integrated with a microfluidic channel. We demonstrate detection of changes in

Experimental Measurement of the Effect of Copper Through-Silicon Via Diameter on Stress Buildup Using Synchrotron-based X-ray Source

June 20, 2015

Author(s)

Chukwudi A. Okoro, Lyle E. Levine, Yaw S. Obeng, Ruqing Xu

In this work, the effect of Cu through-silicon via (TSV) diameter on stress buildup in Cu TSVs was experimentally determined using synchrotron-based X-ray microdiffraction technique. With the aid of atomic force microscopy (AFM), Cu protrusion was also

Amplitude and phase-resolved nano-spectral imaging of surface phonon polaritons in hexagonal boron nitride

June 9, 2015

Author(s)

Samuel Berweger, Shi Zhiwen, Hans A. Bechtel, Sun Yinghui, Zeng Bo, Jin Chenhao, Chang Henry, Michael C. Martin, Markus B. Raschke, Feng Wang

Phonon polaritons are quasiparticles resulting from strong coupling of photons with optical phonons. Excitation and control of these quasiparticles in 2D materials offer the opportunity to confine and transport light at the nanoscale. Here, we image the

EVALUATION OF PRODUCT AUTHENTICATION TECHNOLOGIES: A DETAILED EVALUATION OF THE CURRENT AND EMERGING TECHNOLOGIES

May 25, 2015

Author(s)

Yaw S. Obeng

Product authentication is a critical capability for all supply chains in todays globalized world. Manufacturers, distributors, retailers and customers of all products, from consumer goods to mission critical systems have a growing need to authenticate

Calibration of channel mismatch in time-interleaved real-time digital oscilloscopes

May 22, 2015

Author(s)

Jeffrey A. Jargon, Paul D. Hale, Peter J. Jeavons, John B. Schlager, Andrew M. Dienstfrey, Joo-Gwang Lee, Chihyun Cho

A novel method is proposed for the calibration of channel mismatch in a time-interleaved real- time digital oscilloscope (RTDO). The method only requires a transfer function of time- interleaved ADCs (TIADCs), and also proposes measurement schemes of the

A Multilaboratory Comparison of Calibration Accuracy and the Performance of External References in Analytical Ultracentrifugation

May 21, 2015

Author(s)

Jeffrey A. Fagan

Analytical ultracentrifugation (AUC) is a first principles based method to determine absolute sedimentation coefficients and buoyant molar masses of macromolecules and their complexes, reporting on their size and shape in free solution. The purpose of this

Modifying spin injection characteristics in the Co/Alq3 system by using a molecular self-assembled monolayer

May 19, 2015

Author(s)

Hyuk-Jae Jang, Jun-Sik Lee, Sujitra J. Pookpanratana, Ich C. Tran, Curt A. Richter, Christina A. Hacker

We present the results of experiments that explore the influence of molecular self-assembled monolayers (SAMs) on characteristics of spin injection into an organic semiconductor, Alq3 [tris-(8-hydroxyquinoline) aluminum] from a ferromagnetic metal, Co. Two