Nanostructures Composed of Dual Plasmonic Materials Exhibiting High Thermal Stability and SERS Enhancement. (27th January 2021)

• Record Type: Journal Article
• Authors: Wang, Le; Wang, Shengyan; Mei, Lin; Sun, Jie; Shi, Feng; Zhang, Nan; Jiang, Ruibin
• Is Part Of: Particle and particle systems characterization. Volume 38:Number 4(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-01-27
• Subjects: core‐shell nanostructures -- metal nitrides -- plasmon -- SERS enhancement -- thermal stability; Particles -- Periodicals; 620.43
• DOI: 10.1002/ppsc.202000321
• Languages: English
• ISSNs: 0934-0866

Abstract

Abstract: As one kind of alternative to conventional metals, titanium nitride offers many advantages in the rapidly growing fields of plasmonics and metamaterials. However, the development of TiN x ‐based plasmonics is severally limited by the difficulty in the preparation. Herein, a facial approach is developed for the preparation of Au@TiN x core‐shell nanostructures. The synthesis starts with colloidal Au nanospheres, followed by the growth of amorphous TiO2 shells. The obtained Au@a‐TiO2 nanostructures convert into Au@TiN x through nitridation at high temperature in ammonia atmosphere. The prepared Au@TiN x nanostructures have strong plasmonic scatting in the visible region and strong field enhancement at the surface of nanostructures. Au@TiN x nanostructures also exhibit a relatively large enhancement for Raman scattering. The developed preparation method can produce TiN x nanostructures with relatively uniform size and thus will be very helpful to the development of TiN x ‐base plasmonics. Abstract : Nanostructures composed of dual plasmonic materials, Au and titanium nitride, are successfully prepared for the first time by nitridation of Au@TiO2 nanostructures at high temperature. The obtained dual plasmonic nanostructures well keep the core@shell structure, with relatively uniform size. Such dual plasmonic Au@TiN x nanostructures exhibit strong plasmon resonance in the visible region and excellent thermal stability.