Novel synthesis of hierarchical flower-like silver assemblies with assistance of natural organic acids for surface-enhanced Raman spectroscopy

Using ascorbic acid as reducing agent and different organic acids (e.g., oxalic acid, DL-malic acid and citric acid) as structure-directing agents, a novel class of hierarchical flower-like silver mesoparticles with tunable size and shape were synthesized in high yield. The chemical structures of or...

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Bibliographic Details
Published in:Journal of materials science 2017-10, Vol.52 (19), p.11391-11401
Main Authors: Zhang, Cong-yun, Hao, Rui, Zhao, Bin, Fu, Yi-zheng, Hao, Yao-wu, Liu, Ya-qing
Format: Article
Language:English
Subjects:
Acids
Aliphatic acids
Amino acids
Anisotropy
Ascorbic acid
Characterization and Evaluation of Materials
Chemical Routes to Materials
Chemical synthesis
Chemistry and Materials Science
Citric acid
Classical Mechanics
Coordination compounds
Crystallography and Scattering Methods
Functional groups
Government finance
Malic acid
Materials Science
Metal particles
Morphology
Nanoparticles
Organic acids
Organic chemistry
Oxalates
Oxalic acid
Polymer Sciences
Raman spectra
Raman spectroscopy
Reagents
Reducing agents
Resonance scattering
Silver
Solid Mechanics
Structural hierarchy
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Summary:Using ascorbic acid as reducing agent and different organic acids (e.g., oxalic acid, DL-malic acid and citric acid) as structure-directing agents, a novel class of hierarchical flower-like silver mesoparticles with tunable size and shape were synthesized in high yield. The chemical structures of organic acids with different carbon chain length and functional groups have been found to play critical roles in the process of assembling metal nanoparticles into hierarchical complex structures. The anisotropic morphologies of as-synthesized silver structures could readily be tuned by simply varying the concentrations of reagents and the growth temperature. This synthesis method provides a new synthetic strategy for the anisotropic growth and morphology control of metallic particles. The textured flower-like Ag mesoparticles with hierarchical three-dimensional structures could generate abundant surface plasmon resonance hot spots and exhibit an excellent surface-enhanced Raman scattering (SERS) activity, revealing the promising potential for practical applications in single-particle and particle-array SERS sensing.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-017-1292-2