Size‐Tunable Synthesis of Hollow Gold Nanospheres through Control of Reaction Temperature. (27th December 2016)

• Record Type: Journal Article
• Authors: Pu, Ying‐Chih; Song, Frank; Zhang, Weichun; Lindley, Sarah; Adams, Staci; Zhang, Jin Z.
• Is Part Of: Particle and particle systems characterization. Volume 34:Number 8(2017:Aug.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2016-12-27
• Subjects: discrete dipol approximation -- galvanic exchange reactions -- hollow gold nanospheres -- nanoparticles -- surface plasmon resonance; Particles -- Periodicals; 620.43
• DOI: 10.1002/ppsc.201600255
• Languages: English
• ISSNs: 0934-0866

Abstract

Abstract : Here, it is demonstrated that the size tunable hollow gold nanospheres (HGNs) of ≈24–122 nm in diameter can be facilely achieved by controlling a signal parameter, reaction temperature, in the synthesis. The varied particle sizes of HGNs result in highly tunable surface plasmon resonance (SPR) absorption in the entire visible to near infrared region of the spectrum, with maximum peak position from 565 to 850 nm when the reaction temperature is varied from 80 to 10 °C. The particle size and structural properties are determined using dynamic light scattering, transmission‐mode scanning electron microscopy, and high‐resolution transmission electron microscopy. The optical properties are characterized using UV–vis spectroscopy. A mechanism behind the temperature‐dependent HGN synthesis is explained by the thermodynamics of homogeneous nuclei formation of the cobalt scaffold. Discrete dipole approximation calculations are performed to simulate the SPR spectrum and provide insight into the relation between the SPR absorption and structural details of the HGNs. This study demonstrates a simple yet effective method based on temperature control for synthesizing produce size tunable HGNs with varying properties of interest for different applications. Abstract : A facile synthesis is reported for modulating the diameter of hollow gold nanosphere (HGN) from 24 to 122 nm through controlling the reaction temperature of cobalt scaffold. The resultant diameter of HGNs affects its surface plasmon resonance that spans from the visible into the Near IR.