Sonication‐Assisted Palladium Nanogaps in a Capacitive Structure: A Tunable and Reliable Solution for Sensitive Hydrogen Monitoring. - Lee, Sang‐kil; Lee, Joonho; Hong, Jiwoo; Park, Seyoung; Cho, Eugene; Lee, Seunghyun; Lee, Keunhyung; Lee, Hyun‐Sook; Lee, Kyu Hyoung; Lee, Wooyoung (Advanced Functional Materials, 2025)