Cover Image, Volume 140, Issue 16

Abstract

This image by Kwanwoo Shin illustrates the process of applying ink mixed with gold nanorods to a 3D printer and utilizing it in a 4D printer that can alter its shape upon exposure to external light. It specifically highlights the shape‐changing mechanism achieved via effective energy transfer in the air as opposed to water. DOI: https://doi.org/10.1002/app.53799