Nanofunctionalization of Additively Manufactured Titanium Substrates for Surface-Enhanced Raman Spectroscopy Measurements

Materials

Bartłomiej Wysocki¹  Andrzej Kudelski²  Anna Majchrowicz³  Agata Roguska⁴  Marcin Hołdyński⁴  Marcin Pisarek⁴  Robert Ambroziak⁴ 

[1] Center of Digital Science and Technology, Cardinal Stefan Wyszynski University in Warsaw, Woycickiego 1/3, 01-938 Warsaw, Poland;Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland;Faculty of Materials Science and Engineering, Warsaw University of Technology, Wołoska 141, 02-507 Warsaw, Poland;Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland;

关键词: additive manufacturing;    powder bed fusion (PBF);    CP titanium;    anodic oxidation;    TiO₂ nanotubes;    Ag nanoparticles;   

DOI  :  10.3390/ma15093108

来源: DOAJ

【 摘 要 】

Powder bed fusion using a laser beam (PBF-LB) is a commonly used additive manufacturing (3D printing) process for the fabrication of various parts from pure metals and their alloys. This work shows for the first time the possibility of using PBF-LB technology for the production of 3D titanium substrates (Ti 3D) for surface-enhanced Raman scattering (SERS) measurements. Thanks to the specific development of the 3D titanium surface and its nanoscale modification by the formation of TiO₂ nanotubes with a diameter of ~80 nm by the anodic oxidation process, very efficient SERS substrates were obtained after deposition of silver nanoparticles (0.02 mg/cm², magnetron sputtering). The average SERS enhancement factor equal to 1.26 × 10⁶ was determined for pyridine (0.05 M + 0.1 M KCl), as a model adsorbate. The estimated enhancement factor is comparable with the data in the literature, and the substrate produced in this way is characterized by the high stability and repeatability of SERS measurements. The combination of the use of a printed metal substrate with nanofunctionalization opens a new path in the design of SERS substrates for applications in analytical chemistry. Methods such as SEM scanning microscopy, photoelectron spectroscopy (XPS) and X-ray diffraction analysis (XRD) were used to determine the morphology, structure and chemical composition of the fabricated materials.

【 授权许可】

Unknown