Kavli Affiliate: Xiang Zhang
| First 5 Authors: Hossein Taghinejad, Mohammad Taghinejad, Sajjad Abdollahramezani, Qitong Li, Eric V. Woods
| Summary:
Achieving deterministic control over the properties of low-dimensional
materials with nanoscale precision is a long-sought goal. Mastering this
capability has a transformative impact on the design of multifunctional
electrical and optical devices. Here, we present an ion-assisted synthetic
technique that enables precise control over the material composition and energy
landscape of two-dimensional (2D) atomic crystals. Our method transforms binary
transition metal dichalcogenides (TMDs), like MoSe$_2$, into ternary
MoS$_{2alpha}$Se$_{2(1-{alpha}})$ alloys with systematically adjustable
compositions, ${alpha}$. By piecewise assembly of the lateral, compositionally
modulated MoS$_{2alpha}$Se$_{2(1-{alpha})}$ segments within 2D atomic layers,
we present a synthetic pathway towards the realization of multi-compositional
designer materials. Our technique enables the fabrication of complex structures
with arbitrary boundaries, dimensions as small as 30 nm, and fully customizable
energy landscapes. Our optical characterizations further showcase the potential
for implementing tailored optoelectronics in these engineered 2D crystals.
| Search Query: ArXiv Query: search_query=au:”Xiang Zhang”&id_list=&start=0&max_results=3