Kim Dongha, Lee Dongju, Park Jiseok, Bae Jihoon, Chen Aiping, MacManus-Driscoll Judith L, Lee Sungwon, Lee Shinbuhm
Department of Physics and Chemistry, Department of Emerging Materials Science, DGIST, Daegu, 42988, Republic of Korea.
Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA.
Nano Converg. 2025 Feb 7;12(1):10. doi: 10.1186/s40580-025-00476-3.
The interest in highly sensitive sensors is rapidly increasing for detecting very tiny signals for Internet of Things devices. Here, we achieve ultra-sensitive correlated breathable sensors based on freestanding VO membranes. We fabricate the membranes by growing VO films onto sacrificial SrAlO layer grown on SrTiO, selectively dissolving the SrAlO in water, and then rendering freestanding VO membrane on nanomesh. The nanomeshes are extremely flexible, sweat permeable, and readily skin-adhesive. The resistance of the VO membranes is reversibly tuned by human's tiny mechanical stimuli and breath stimuli. The stimuli modulate the Peierls dimerization of one-dimensional V-V chains in the VO lattice which concomitantly controls the electron correlation and hence resistivity. Since our breathable sensors operate based on quantum-mechanical correlation effects, their sensitivity is 1-2 orders of magnitude higher than conventional tactile and respiratory sensors based on other materials. Thus, the freestanding membranes of correlated oxides on epidermal nanomeshes are multifunctional platforms for developing ultra-sensitive correlated breathable sensors.
对于物联网设备中检测极微小信号的高灵敏度传感器的兴趣正在迅速增加。在此，我们基于独立的VO膜实现了超灵敏的相关透气传感器。我们通过在生长于SrTiO上的牺牲性SrAlO层上生长VO薄膜、在水中选择性溶解SrAlO，然后在纳米网上制备独立的VO膜来制造这些膜。这些纳米网极其灵活、透汗且易于与皮肤粘附。VO膜的电阻可通过人体微小的机械刺激和呼吸刺激进行可逆调节。这些刺激调节VO晶格中一维V-V链的佩尔斯二聚化，从而同时控制电子相关性进而控制电阻率。由于我们的透气传感器基于量子力学相关效应运行，其灵敏度比基于其他材料的传统触觉和呼吸传感器高1-2个数量级。因此，表皮纳米网上相关氧化物的独立膜是开发超灵敏相关透气传感器的多功能平台。
