研究目的
To investigate the adsorption and orientation behavior of pterin-6-carboxylic acid on gold-capped silicon nanopillars using surface enhanced Raman spectroscopy (SERS) and density functional theory (DFT) methods.
研究成果
The study of the orientation of Pt6C on gold-capped silicon nanopillars is carried out using SERS spectroscopy and DFT calculations. The comparison between SERS and Raman scattering spectra show that the interaction of the Pt6C with the nanostructured gold surface is mainly through the nitrogen of the amino group and the orientation follows a lying down configuration confirmed by the bonding of the aromatic ring and the electron pair of the nitrogen in NH2 group of pterin.
研究不足
The main limitation in using colloid metal nanoparticles is the tendency for nanoparticle conglomeration after the addition of the analyte which often leads to poor reproducibility of the SERS spectra.
1：Experimental Design and Method Selection:
The study employed SERS and DFT methods to investigate the orientation and adsorption behavior of pterin-6-carboxylic acid on gold-capped silicon nanopillars.
2：Sample Selection and Data Sources:
Pterin-6-carboxylic acid was obtained from Sigma-Aldrich Corp (USA).
3：List of Experimental Equipment and Materials:
A Horiba scientific LabRam HR evolution (Yobim Yvon, USA) with an acquisition range of 50-4000 cm-1 was used for Raman scattering and SERS measurements.
4：Experimental Procedures and Operational Workflow:
A droplet of a freshly prepared Pt6C solution was deposited on the SERS active substrates and left to dry. The Raman scattering signal was recorded over an area of ca.
5：05 mm2 with 17 and 11 μm, x and y step sizes, respectively. Data Analysis Methods:
The DFT method was employed to obtain vibrational spectra of free Pt6C and Pt6C bound to a cluster of ten gold atoms (Au10).
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