Controllable Preparation and SERS Performance Study of Gold Nanostars
Gold Nanostars(AuNSs)have shown potential application advantages in detection fields such as pesti-cides,biology,and medicine due to their numerous sharp angular structures on the surface,which can signifi-cantly enhance the SERS signal intensity.Their controllable preparation has become a research hotspot in recent years.This paper uses seed growth method to prepare AuNSs,and adjusts the volume of chloroauric acid(HAuCl4)in the reaction system to achieve particle size control of AuNSs,and then,its SERS performance is dis-cussed.The morphology was characterized by scanning electron microscopy(SEM),and the Raman perfor-mance was tested using a confocal micro Raman spectrometer with an excitation wavelength of 633nm.The re-sults showed that controlling the volume of HAuCl4 during the reaction process can effectively regulate the particle size from about 80nm to 800nm.The prepared AuNSs have uniform morphology and strong spectral response to four common probe molecules(R6G,MB,MG,CV),making them an effective regulatory tool.At the same time,the influence of AuNSs particle size on SERS spectra was briefly discussed,which can provide reference for the selection of SERS substrates in actual sample detection.
万方数据
维普
