Cantilever deflection associated with hybridization of monomolecular DNA film

Yue Zhao, Baskar Ganapathysubramanian, and Pranav Shrotriya

Hybridization of single stranded DNA immobilized on a microcantilever surface leads to cantilever deflection, which may be used as a method for detection of pathogens and biohazards. This paper presents an investigation of the underlying mechanism behind the deflection and compares numerical predictions with experimental results.

J. Appl. Phys. 111, 074310 (2012)

Tunable magnetocaloric effect near room temperature in La_0.7-xPr_xSr_0.3MnO₃ (0.02 ≤ x ≤ 0.30) manganites

YingDe Zhang, Paula J. Lampen, The-Long Phan, Seong-Cho Yu, Hariharan Srikanth, and Manh-Huong Phan

The authors present a systematic investigation of the magnetic and magnetocaloric properties of La_0.7-xPr_xSr_0.3MnO₃ using temperature dependent magnetization measurements and Arrott analysis.

J. Appl. Phys. 111, 063918 (2012)

Electromigration study of copper lines on steps prepared by a plasma-based etch process

Chi-Chou Lin and Yue Kuo

This paper describes the examination of sub-micron copper interconnect lines over a step from one material to another by measurements of the electromigration phenomenon. The team was able to identify dielectric topography and test temperature of the systems as critical factors for the lifetime of the copper line.

J. Appl. Phys. 111, 064909 (2012)

Measurement of semiconductor surface potential using the scanning electron microscope

Jennifer T. Heath, Chun-Sheng Jiang, and Mowafak M. Al-Jassim

The authors study the voltage contrast effect in the scanning electron microscope (SEM) using samples that have an abrupt heterojunction or a diffused homojunction. The secondary electron (SE) signals were calibrated for the samples by studying them at varying applied biases. As a result, the near-surface potentials and related information were accurately measured with an SEM.

J. Appl. Phys. 111, 046103 (2012)

Memory effects in superparamagnetic and nanocrystalline Fe₅₀Ni₅₀ alloy

D. De, A. Karmakar, M. K. Bhunia, A. Bhaumik, S. Majumdar, and S. Giri

The authors investigate a single structural phase of a nanocrystalline Fe₅₀Ni₅₀ alloy that is embedded in an amorphous silica matrix having volume fractions of 1%, 5%, and 10%. Results indicate that the nanoparticles can exhibit superparamagnetic behavior and the authors discuss this characteristic in relation to observed memory effects.

J. Appl. Phys. 111, 033919 (2012)