Ostwald‐Ripening‐Induced Growth of Parallel Face‐Exposed Ag Nanoplates on Micro‐Hemispheres for High SERS Activity

Zhu, Congshan; Meng, Guowen; Huang, Qing; Zhang, Yao; Tang, Haibin; Qian, Yuguo; Chen, Bin; Wang, Xiujuan

doi:10.1002/chem.201300454

Cited by 17 publications

(15 citation statements)

References 40 publications

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“…Analyte molecules are more readily located in "hot planes" than in either "hot spots" or "hot lines" [55]. Therefore, a system of parallel nanoplates would have promise in SERS-based trace detection.…”

Section: Pdms Microchannel-based Devicesmentioning

confidence: 99%

Review of microfluidic approaches for surface-enhanced Raman scattering

Zhou

Kim

2016

Sensors and Actuators B: Chemical

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Section: Pdms Microchannel-based Devicesmentioning

confidence: 99%

Review of microfluidic approaches for surface-enhanced Raman scattering

Zhou

Kim

2016

Sensors and Actuators B: Chemical

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“…19 The driving forces of dissolution and regrowth can be extended from Ostwald ripening to other situations, like chemical etching, thus NPs with high quality can be generated. 24 The aggregation of many small spheres can construct a big sphere, however, if the stabilities of the spheres in big sphere are different, after ripening, only the most stable spheres will remain. 20 The dissolution and regrowth method is a powerful tool to accomplish high quality NPs or other materials like graphene.…”

Section: Ostwald Ripeningmentioning

confidence: 99%

Nanostructure formation via post growth of particles

Wang

2015

CrystEngComm

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Post growth of particles will lead to new nanostructure formation, and blur the boundaries of crystal growth and molecular chemistry as well. The driving force of post growth usually stems from the inherent stabilities of the nanoparticles (NPs) and the environmental changes, which results in the transformation of the pristine nanostructures. One type of post growth driven by thermodynamic stability is Ostwald ripening, which usually leads to the elimination of small particles, and can be utilized to prepare hollow structures. By sophisticatedly controlling the reaction conditions, the NPs may undergo oriented attachment to form nanostructures with more complexity. This process is different from the random aggregation of nanoparticles; the final morphologies can be ingeniously controlled, and the kinetics resemble polymerization in some cases. If the chemical bonding during the oriented attachment process is replaced by non-covalent bonding, self-assembly of the NPs is achieved. Self-assembly of NPs further extends the diversity of nanostructures, as well as the understanding of crystallization. Post growth of particles is also a feasible strategy to fabricate heterostructures. The wetting behaviour sheds light on the final morphologies of the heterostructures. Meanwhile, seed mediated growth enables an alternative method to control pre-formed NPs. Another heterostructure of atomically-thin layered sheets connected via van der Waals forces also extends the potential of nanomaterials. The driving forces of the post growth of particles are divergent, and the applications are various. It can be utilized to prepare homogeneous and heterogeneous structures. CrystEngCommThis journal is

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“…[1][2][3][4][5][6][7] Among others, hierarchical Au architectures, with nanoscale particles as building blocks, are particularly interesting owing to their dramatically promoted performances in various fields, such as catalysis, 8,9 surface enhanced Raman scattering (SERS), 8,10 photothermal therapy 2 and biosensors. [1][2][3][4][5][6][7] Among others, hierarchical Au architectures, with nanoscale particles as building blocks, are particularly interesting owing to their dramatically promoted performances in various fields, such as catalysis, 8,9 surface enhanced Raman scattering (SERS), 8,10 photothermal therapy 2 and biosensors.…”

Section: Introductionmentioning

confidence: 99%

Facile interfacial synthesis of large sized 3D gold spherical architectures with strong individual particle SERS response and high reproducibility

Yao

Zhang

et al. 2015

J. Mater. Chem. C

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In this work, a simple and facile strategy was developed for the fabrication of large sized Au spherical architectures (AuSAs) with flexible nanoflakes as subunits by using a liquid-liquid interfacial reaction route at room temperature. The as-prepared AuSAs were characterized and analyzed by scanning electron microscopy, X-ray powder diffraction, thermogravimetric analysis and transmission electron microscopy. The effects of a series of factors on the morphologies and structures of the products were studied in detail. On the basis of control experiments and molecular dynamics simulations, a possible growth mechanism was suggested for the formation of AuSAs at the interface between toluene and water. Furthermore, due to the relatively large particle size, high surface roughness and high symmetry of the spherical characteristics, AuSAs could be used to perform individual particle SERS investigation, which demonstrated remarkable SERS responses and high reproducibility. Fig. 9 (a) SERS spectra of R6G adsorbed on five randomly chosen AuSAs; (b) SERS spectra of melamine adsorbed on AuSAs with different concentrations: 1, 10 À4 M; 2, 10 À5 M; 3, 10 À6 M; and 4, 10 À7 M.

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Ostwald‐Ripening‐Induced Growth of Parallel Face‐Exposed Ag Nanoplates on Micro‐Hemispheres for High SERS Activity

Cited by 17 publications

References 40 publications

Review of microfluidic approaches for surface-enhanced Raman scattering

Review of microfluidic approaches for surface-enhanced Raman scattering

Nanostructure formation via post growth of particles

Facile interfacial synthesis of large sized 3D gold spherical architectures with strong individual particle SERS response and high reproducibility

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