Atomic-Scale Two-Dimensional Material Processing System
Abstract
This proposal seeks funding for an atomic-scale two-dimensional material processing system (ATMPS), designed for precision modification of two-dimensional materials (TDMs). The ATMPS uses low-energy ions (less than150 eV) to induce atomic vacancies in TDMs, within an ultrahigh-vacuum (UHV) chamber. Maintaining the vacuum at less than10-10 torr ensures the atomic vacancies retain highly reactive, uncoupled dangling bonds post-irradiation. In the same UHV chamber, bifunctional organic molecules (for example, p-Phenylenediamine and pyrenebutyric acid NHS ester) are evaporated onto the TDMs. These molecules each possesses a functional group that forms covalent bonds with the dangling bonds of the TDM vacancies and another group that can conjugate with specific biomolecules. The modified TDMs, which can be exposed to ambient air and functionalized with biomolecules (e.g., aminated nucleic acids), exhibit a high degree of control, density, uniformity, and stability. Importantly, the ATMPS enables these enhancements without compromising the TDMs inherent electrical properties, including their interfacial chargetransfer conductivity. The ATMPS also allows in situ deposition of metals for passivation or device fabrication without exposing the modified TDMs to air. The ATMPS will significantly contribute to the research undertaken by the PI s, which aims to develop an all-electronic platform technology based on defect-engineered TDMs for multiscale biosystem interfacing. Moreover, the ATMPS has broader applications, aiding in the processing of low-dimensional materials beyond TDMs, and supporting a wide range of research in nanomaterials, biomaterials, and nano-microfabrications. This will be particularly beneficial for other Department of Defense (DoD) sponsored projects at the University of Massachusetts Amherst. Lastly, the ATMPS will serve as a valuable teaching tool, providing educational resources on TDM functionalization and processing technologies for students in materials science and nano-micro-fabrication courses.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 07, 2024
- Source ID
- FA95502310565
Entities
People
- Jinglei Ping
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Massachusetts