Julia W Hsu

Title: Innovations of Julia W. Hsu in Scanning Probe Microscopy

Introduction

Julia W. Hsu is an accomplished inventor based in Charlottesville, VA (US). She has made significant contributions to the field of scanning probe microscopy through her innovative patent. Her work focuses on enhancing the precision of tip-to-sample distance control, which is crucial for various applications in nanotechnology.

Latest Patents

Julia W. Hsu holds a patent titled "Nanometer distance regulation using electromechanical power dissipation." This invention presents a convenient, non-optical method for scanning probe microscopy tip-to-sample distance control based on the impedance change in a shear-force dither piezo. The method involves determining the tip-sample distance by measuring the impedance change in a shear-force piezo-member. A Wheatstone type bridge can be utilized to regulate the tip-sample separation. Alternatively, an electrical bridge regulates the tip-sample separation relative to the bridge output by driving the piezo/tip with a sine wave and combining it with a phase-referenced wave of equal amplitude at a 180-degree phase shift. The electronic bridge detects impedance changes of about -100 dB across loads with impedance phases between -90 degrees to +90 degrees. Power dissipation is determined by measuring changes in electric impedance that a dither piezo presents to an oscillator. This non-optical method of determining probe-to-sample distance consists of changing the probe-to-sample distance of an oscillating scanning probe and measuring the changes in the electro-mechanical power dissipation.

Career Highlights

Julia W. Hsu is associated with the Uva Patent Foundation, where she continues to innovate and contribute to her field. Her work has garnered attention for its practical applications and advancements in technology.

Collaborations

Julia has collaborated with notable colleagues, including Mark Lee and Bascom S. Dearer, Jr. These collaborations have further enriched her research and development efforts.

Conclusion

Julia W. Hsu's contributions to scanning probe microscopy through her innovative patent demonstrate her expertise and commitment to advancing technology. Her work continues to influence the field and pave the way for future innovations.