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1. Fracture strength of native and oxidized silicon nanowires
Frank W DelRio, Ryan Michael White, Sergiy Krylyuk, Albert Davydov, Lawrence H Friedman, Robert Francis Cook
Silicon nanowires (SiNWs) have recently attracted significant attention in a number of different application areas in large part due to their unique mechanical, electrical, optical, piezoelectrical, and thermoelectrical properties. For example, the ...
2. Near-field microwave microscopy of one-dimensional nanostructures
Samuel Berweger, Paul T Blanchard, Rebecca C Quardokus, Frank W DelRio, Thomas M Wallis, Pavel Kabos, Sergiy Krylyuk, Albert Davydov
With the ability to measure sample conductivity with
nanometer spatial resolution, scanning microwave microscopy
(SMM) is a powerful tool to study nanoscale electronic systems
and devices. Here we demonstrate the general capability to
image elect ...
3. Laser-induced particle adsorption on atomically thin MoS2
Bien Cuong Tran Khac, Ki-Joon Jeon, Seung Tae Choi, Yong Soo Kim, Frank W DelRio, Koo-Hyun Chung
Atomically thin molybdenum disulfide (MoS2) shows great potential for use in nano-devices due to its remarkable electronic, optoelectronic, and mechanical properties. These material properties are often dependent on the thickness or the number of lay ...
4. Orthogonal Analysis of Functional Gold Nanoparticles for Biomedical Applications
De-Hao D. Tsai, Yi-Fu Lu, Frank W DelRio, Tae Joon Cho, Suvajyoti S. Guha, Michael Russel Zachariah, Fan Zhang, Andrew John Allen, Vincent A Hackley
We report a comprehensive strategy based on implementation of orthogonal measurement techniques to provide critical and verifiable material characteristics for functionalized gold nanoparticles (AuNPs) used in biomedical applications. Thiolated polye ...
5. Heterogeneity and length scale effects in PEG-based hydrogels
Brian G Bush, Jenna M Shapiro, Frank W DelRio, Robert Francis 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 pr ...
6. Micromechanical Testing of Electroplated Gold Alloy Films using Theta-Like Specimens
Mark McLean, William A Osborn, Oliver Boomhower, Christopher Keimel, Rebecca Kirkpatrick, Frank W DelRio
Micromechanical testing of electroplated gold alloy films has been conducted using the theta
specimen geometry. Specimens were formed by a standard combination of photolithography,
electroplating, and deep reactive ion etching. Testing was perfor ...
7. Fracture strength of micro- and nano-scale silicon components
Frank W DelRio, Robert Francis Cook, Brad Boyce
Silicon devices are ubiquitous in many micro- and nano-scale technological applications, most notably microelectronics and microelectromechanical systems (MEMS). Despite their widespread usage, however, issues related to uncertain mechanical reliabi ...
8. Design and test of reliable, high strength, ingressive polycrystalline silicon microgripper arrays
Siddharth Hazra, J L Beuth, Grant A. Myers, Frank W DelRio, Maarten de Boer
We present the design and extensive validation of a micromachined gripper array that enables
reliable transmission of forces up to 10 milliNewtons. The gripper is constructed with
polycrystalline silicon, a brittle material. Two ingressive snap-a ...
9. Stress mapping of micromachined polycrystalline silicon devices via confocal Raman microscopy
Grant A. Myers, Siddharth Hazra, Maarten de Boer, Chris A Michaels, Stephan J Stranick, Ryan P. Koseski, Robert Francis Cook, Frank W DelRio
Stress mapping of micromachined polycrystalline silicon devices with components in various levels of uniaxial tension was performed. Confocal Raman microscopy was used to form two-dimensional maps of Raman spectral shifts, which exhibited variations ...
10. Controlled Formation and Characterization of Dithiothreitol-Conjugated Gold Nanoparticle Clusters
De-Hao D. Tsai, Tae Joon Cho, Frank W DelRio, Justin M Gorham, Jiwen Zheng, Jiaojie Tan, Michael Russel Zachariah, Vincent A Hackley
We report a systematic study of the controlled formation of discrete-size gold nanoparticle clusters (GNCs) by interaction with the reducing agent dithiothreitol (DTT). Asymmetric-flow field flow fractionation and electrospray differential mobility a ...