Cho Minkyu, Zhu Jianxiong, Kim Hyeonggyun, Kang Kyungnam, Park Inkyu
Mechanical Engineering and KI for NanoCentry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141 , Republic of Korea.
ACS Appl Mater Interfaces. 2019 Apr 10;11(14):13343-13349. doi: 10.1021/acsami.8b19848. Epub 2019 Mar 26.
A half-pipe palladium nanotube network (H-PdNTN) structure was developed for high-performance hydrogen (H) sensor applications. To fabricate the sensor, suspended poly(vinyl alcohol) (PVA) nanofiber bundles were electrospun on a conductive substrate, followed by a palladium (Pd) deposition on top of the PVA nanofiber bundles. Then, Pd-deposited PVA nanofibers were transferred to a host substrate, and the PVA nanofiber templates were selectively removed. Various material analyses confirmed that the PVA nanofibers were successfully dissolved leaving a half-pipe-shaped Pd nanotube network. The fabricated Pd nanotube-based sensors were tested for H responses with different gas concentrations. The 4 nm thick sensor showed the highest response (Δ R/ R) to H gas. Platinum (Pt) decoration of the sensor showed an improved response speed compared to that of the pristine sensor via the catalytic function of Pt. Additionally, the sensor exhibited good H selectivity against other interfering gases. The H-PdNTN H sensor provides a facile and cost-effective way to fabricate high-performance H sensors.
一种用于高性能氢（H）传感器应用的半管钯纳米管网络（H-PdNTN）结构被开发出来。为了制造该传感器，将悬浮的聚乙烯醇（PVA）纳米纤维束静电纺丝到导电基板上，然后在PVA纳米纤维束顶部沉积钯（Pd）。接着，将沉积有Pd的PVA纳米纤维转移到主体基板上，并选择性地去除PVA纳米纤维模板。各种材料分析证实，PVA纳米纤维已成功溶解，留下半管形状的Pd纳米管网络。对制造的基于Pd纳米管的传感器进行了不同气体浓度下的氢响应测试。4纳米厚的传感器对氢气表现出最高的响应（ΔR/R）。通过铂（Pt）的催化作用，对传感器进行Pt修饰后，其响应速度比原始传感器有所提高。此外，该传感器对其他干扰气体表现出良好的氢选择性。H-PdNTN氢传感器提供了一种简便且经济高效的方法来制造高性能氢传感器。
