3D Chiplet for Optical Package and Power Package

Cong WANG

Beijing University of Technology

Abstract:

The self-assembly structures of nanomaterials determine their entire functionality, influencing their applications in materials science, plasmonic physics, optoelectronics and various biological fields. However, precise control over the assembly behavior of nanocrystals has been proven challenging, especially in all inorganic assembly without much organic modification. In this study, we develop a minimum modification method to control the assembly behavior of nanocrystals via single atom cluster interactions, giving rise to the formation of nano-dimers, trimers, and more complicated ordered-aggregates. The principle of the single-atom cluster driven nanomaterials assembly originates from its negative enthalpic contribution. Therefore, we employ microfluidic to generate different single atom clusters (tungstate, molybdate, niobate, tantalate etc.) and their concentrations with different enthalpic contributions to fine-tune the intra-nanocrystal interactions of various metal nanocrystals (Ag, Au, Ni, Cu etc.), allowing us to obtain the desired-sized and ordered assemblies. The metal nanocrystal assemblies with uniform structures can be used as sensitive and reliable surface enhanced Raman scattering sensing substrates. We open up a new avenue towards precisely controlling the self-assembly behavior of nanocrystals via single atom clusters, bearing great application potentials in metamaterials, plasmonic, optoelectronics and biomedical fields.

Speaker's Biography:

Professor Cong Wang's research includes fundamental and applied aspects of atomic scale materials fabrication as well as nano-patterning techniques for electronic and photonic devices. He has co-authored more than 100 papers in peer-reviewed journals, including Advanced Materials, Science Advances.

His research has been recognized with many awards including, most recently, the National young Talents (2023), Beijing young Talents (2017). He has supported many technics innovation in start-ups (eg. SuoZhen Bio., Raze Tech.)