Additive manufacturing through opto-thermomechanical printing of nanoparticles at the nanoscales

Additive manufacturing through opto-thermomechanical printing of nanoparticles at the nanoscales

Presenter(s)

Md. Shah Alam

Comments

This presentation was given live via Zoom at 2:00 p.m. (Eastern Time) on Wednesday, April 22.

Description

Additive manufacturing or 3D printing at macro- and micro scale is well developed and widely used in different areas such as aerospace, automotive, military, optics and medical industries. However, 3D printing at nanoscale is still very challenging and researchers are striving to improve the manufacturing speed, accuracy, resolution at the nanoscales. This work demonstrates a cost-effective and rapid nanomanufacturing technique through opto-thermomechanical printing of nanoparticles which is capable of 3D printing at nanoscales. In this technique, a droplet of colloidal metallic nanoparticles solution is dried on a PDMS coated glass donor substrate. Nanoparticles are attached to the surface of the substrate due to Van der Walls attraction force. The individual nanoparticles are sequentially exposed to a focused laser beam. The exposed nanoparticle absorbs laser light and heats donor substrate which creates a thermal expansion force on the nanoparticle. As a result, nanoparticle is rapidly transferred to the receiver substrate. This technique enables selectively pick different types and sizes of nanoparticles in sequence and print them on the receiver substrate in a 2D or 3D patterns. One of the major distinct features of this technique is that the unwanted printed nanoparticles on the receiver substrate can further be removed by again applying opto-thermomecanical force, which can be used as correction step. The flexibility and versatility of this technique can facilitate the manufacturing of 2-D and 3-D devices for nanophotonics, microelectronics and energy harvesting.

Publication Date

4-22-2020

Project Designation

Graduate Research

Primary Advisor

Chenglong Zhao

Primary Advisor's Department

Electro-Optics and Photonics

Keywords

Stander Symposium project, School of Engineering

Additive manufacturing through opto-thermomechanical printing of nanoparticles at the nanoscales

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