Print Email Facebook Twitter Direct Comparison of PdAu Alloy Thin Films and Nanoparticles upon Hydrogen Exposure Title Direct Comparison of PdAu Alloy Thin Films and Nanoparticles upon Hydrogen Exposure Author Bannenberg, L.J. (TU Delft RST/Neutron and Positron Methods in Materials) Nugroho, Ferry Anggoro Ardy (Chalmers University of Technology) Schreuders, H. (TU Delft ChemE/Afdelingsbureau) Norder, B. (TU Delft ChemE/O&O groep) Trinh, Thuy-Trang (Helmholtz Zentrum Dresden Rossendorf) Steinke, N.J. (Rutherford Appleton Laboratory) van Well, A.A. (TU Delft RID/Algemeen/Bedrijfsondersteuning) Langhammer, Christoph (Chalmers University of Technology) Dam, B. (TU Delft ChemE/Materials for Energy Conversion and Storage) Date 2019 Abstract Nanostructured metal hydrides are able to efficiently detect hydrogen in optical sensors. In the literature, two nanostructured systems based on metal hydrides have been proposed for this purpose each with its own detection principle: continuous sub-100 nm thin films read out via optical reflectance/transmittance changes and nanoparticle arrays for which the detection relies on localized surface plasmon resonance. Despite their apparent similarities, their optical and structural response to hydrogen hasnever been directly compared. In response, for the case of Pd1−yAuy (y = 0.15−0.30) alloys, we directly compare these two systems and establish that they are distinctively different. We show that the dissimilar optical response is not caused by the different optical readout principles but results from a fundamentally different structuralresponse to hydrogen due to the different nanostructurings. The measurements empirically suggest that these differences cannot be fully accounted by surface effects but that the nature of the film−substrate interaction plays an important role and affects both the hydrogen solubility and the metal-to-metal hydride transition. In a broader perspective, our results establish that the specifics of nanoconfinement dictate the structural properties of metal hydrides, which in turn control the properties of nanostructured devices including the sensing characteristics of optical hydrogen sensors and hydride-based active plasmonic systems. Subject nanostructuringoptical hydrogen sensingmetal hydrideplasmonicsthin filmsnanoparticlesPdAuX-ray diffraction To reference this document use: http://resolver.tudelft.nl/uuid:326fac23-27b5-477b-94fe-ec77c3ddb3c0 DOI https://doi.org/10.1021/acsami.8b22455 ISSN 1944-8244 Source ACS applied materials & interfaces, 11 (17), 15489-15497 Part of collection Institutional Repository Document type journal article Rights © 2019 L.J. Bannenberg, Ferry Anggoro Ardy Nugroho, H. Schreuders, B. Norder, Thuy-Trang Trinh, N.J. Steinke, A.A. van Well, Christoph Langhammer, B. Dam Files PDF acsami.pdf 1.97 MB Close viewer /islandora/object/uuid:326fac23-27b5-477b-94fe-ec77c3ddb3c0/datastream/OBJ/view