The morphology control on the preparation of silver nanotriangles

• Published in: Current applied physics Vol. 19; no. 11; pp. 1187 - 1194
• Main Authors: Hu, Guansong, Zhang, Wen, Zhong, Yuanzhi, Liang, Guorun, Chen, Qingyuan, Zhang, Wanzhong
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.11.2019; 한국물리학회
• Subjects: Cetyl trimethyl ammonium bromide; Preparation; Seed; Silver nanotriangle; Size and morphology; 물리학; Cetyl trimethyl ammonium bromide; Silver nanotriangle; Seed; Preparation; Size and morphology
• ISSN: 1567-1739; 1878-1675
• DOI: 10.1016/j.cap.2019.08.002

A seed-mediated growth method was commonly applied to prepare one-dimension nanomaterials. However, some associated particles were unavoidable in the formation of target nanoparticles. Herein, we reported a modified method to prepare silver nanotriangles with higher uniform shape and particle size. The size and morphology of the formed nanoparticles could be controlled by regulating reaction conditions. The results showed that cetyl trimethyl ammonium bromide (CTAB) concentration and seed concentration were related with both the morphology and the particle size. The NaOH concentration, AgNO3 concentration, and the mole ratio of Vc/Ag+ mainly affected the particle size of the formed nanotriangles. The formation of silver nanotriangles may be due to the selective stacking of the new tiny nanoparticles and the oriented growth of silver seed crystals. The oxidizing action of Br−/O2 existing in the CTAB system should be responsible for the final morphology of truncated triangular silver nanoplates. [Display omitted] •Silver nanotriangles can be effectively prepared by the improved method.•The monodispersity of obtained nanotriangles is obviously improved.•The particle size of obtained nanotriangles is easily adjusted.•One of the key is the selective stacking of the new tiny nanoparticles.•The other key is the oriented growth of silver seed crystals.