# 4D Encryption System: Hydrophilic–Hydrophobic Polyurethane Actuators with Smart Color Switching for High‐Capacity Data Storage

> Research article (Advanced Functional Materials, 2025) · cited 16× · AI/ML

**Wikidata**: [openalex:W4408344486](https://www.wikidata.org/wiki/openalex:W4408344486)  
**Source**: https://4ort.xyz/entity/4d-encryption-system-hydrophilichydrophobic-polyurethane-actuators-with-smart-color-switching-for-highcapacity-data-stor