Chaojun Cheng, Ph.D.
Senior Research And Development Engineer at MicroPort Endovastec- Claim this Profile
Click to upgrade to our gold package
for the full feature experience.
-
English Full professional proficiency
-
Chinese Native or bilingual proficiency
Topline Score
Bio
Experience
-
MicroPort Endovastec
-
China
-
Medical Equipment Manufacturing
-
1 - 100 Employee
-
Senior Research And Development Engineer
-
Jul 2023 - Present
-
-
-
Johns Hopkins Medicine
-
United States
-
Hospitals and Health Care
-
700 & Above Employee
-
Postdoctoral Fellow
-
Aug 2022 - Jun 2023
Project: A cuff lead used to deliver drug or electrical stimuli to sciatic nerve. This cuff lead contains a self-curling head, fluid channels, catheter adaptor, suture holes, and catheters that lead to external electronic device. • Design, fabricate, and test the cuff lead. • Developed a parallel fabrication method which reduced fabrication duration by 95%. • Select bio-compatible materials (silicone rubber and plastic) for each component. • Assess the impact of design and material changes over fabrication and performance. • Improved reliability by replacing brittle agar gel with rubbery crosslinked sodium alginate. • Draft fabrication and implantation protocols and teach external collaborators. • Work with electrical engineer and veterinary surgeon to collect feedbacks and improve design. Show less
-
-
-
The Johns Hopkins University
-
United States
-
Higher Education
-
700 & Above Employee
-
Research Assistant
-
Jan 2017 - Aug 2022
Project: In this lab, we are developing a novel neural implant that can safely deliver direct current (DC) to suppress neural activities.• Designed a microfluidic valve electrically actuated with Nitinol wire which consumes 50% less energy and provides 25x contrast ratio of valve’s impedance.• Designed an ionic transistor as a non-mechanical control of ion concentration in microfluidics which improves reliability by eliminating moving part in device.• Designed an ionic current sensor which enables accurate long-term measurement (<2% error) of electrical current in a complex microfluidic channel network.• Designed a microfluidic chip with embedded microvalves and sensor which was the first working prototype of the safe DC neural stimulator.• Developed an in vivo rat model which requires 90% less electrical current to test the neural stimulator. Show less
-
-
Teaching Assistant
-
Aug 2019 - Jun 2020
Course: Neural Implants and Interfaces.Duties: Grading, organizing TA sessions, lecturing, and providing MATLAB help to students.
-
-
-
Wenzhou city gas
-
Wenzhou, Zhejiang, China
-
Quality Control and Safety Engineer
-
May 2010 - Dec 2013
Natural Gas Construction Office, Technology and Safety Control Department. • Selected equipment and material from external vendors for construction work. • Quality and safety control of pipeline construction. • Trained new employees about the quality and safety standards in gas pipeline. Natural Gas Construction Office, Technology and Safety Control Department. • Selected equipment and material from external vendors for construction work. • Quality and safety control of pipeline construction. • Trained new employees about the quality and safety standards in gas pipeline.
-
-
Education
-
The Johns Hopkins University
Doctor of Philosophy - PhD, Mechanical Engineering -
Columbia University in the City of New York
Master of Science - MS, Mechanical Engineering -
Chongqing University
Bachelor of Engineering - BE, Heating, Ventilation, Air Conditioning and Refrigeration Engineering Technology/Technician