Song Han

Title: Innovations of Song Han in Quantum Dot Technology

Introduction

Song Han is an accomplished inventor based in Philadelphia, PA (US). He has made significant contributions to the field of quantum dot technology, particularly in the development of tin sulfide quantum dots for in vivo near-infrared imaging. With a total of two patents to his name, his work is paving the way for advancements in medical imaging techniques.

Latest Patents

Han's latest patents focus on an aqueous approach to synthesize capped SnS quantum dots (QDs). This innovative method involves attaching one or more extending molecules to the capping molecule via peptide bond formation at elevated temperatures. The capped SnS QDs may have a capping molecule:Sn:S molar ratio ranging from 16:3:1 to 16:12:1. A suspension of SnS QDs was heat-treated at 200°C for 0.5-4 hours. The resulting SnS QDs exhibited a near-infrared (NIR) emission peak at 820-835 nm with an excitation wavelength of 690 nm. Initially, the synthesized SnS QDs showed a high positive zeta potential of approximately 30 mV, which rendered them toxic to cells. However, by neutralizing the SnS QDs, the cytotoxicity was reduced to an acceptable level. Notably, the heat-treatment step can be bypassed by adding a glycerol solution containing Sn anions and capping molecules to a glycerol solution of Sn ions.

Career Highlights

Song Han is currently affiliated with Drexel University, where he continues to engage in groundbreaking research. His work has garnered attention for its potential applications in medical imaging and nanotechnology.

Collaborations

Some of his notable coworkers include Wei-Heng Shih and Wan Y Shih, who have collaborated with him on various research projects.

Conclusion

Song Han's innovative work in the field of quantum dot technology is making significant strides in medical imaging. His contributions are essential for the advancement of this technology, and his patents reflect his commitment to improving healthcare solutions.