Thickness-dependent humidity sensing by poly(vinyl alcohol) stabilized Au–Ag and Ag–Au core–shell bimetallic nanomorph resistors oleh Parag Adhyapak, Rohini Aiyer, Sreekantha Reddy Dugasani, Hyeong-U Kim, Chung Kil Song, Ajayan Vinu, Venkatesan Renugopalakrishnan, Sung Ha Park, Taesung Kim, Haiwon Lee, Dinesh Amalnerkar