Designing caps for colloidal Au nanoparticles

Tian, Xiaoli; Zong, Jianpeng; Zhou, Yusai; Chen, Dapeng; Jia, Jia; Li, Shuaibin; Dong, Xiaochen; Feng, Yuhua; Chen, Hongyu

doi:10.1039/d0sc05780k

Cited by 21 publications

(19 citation statements)

References 38 publications

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“…Other nanostructures with sharp tips, edges, or corners are designed to improve the SERS activity, such as bowtie, 27 dendritic, 28–30 nanocaps, nanotriangles, 31,32 nanoprisms, and hedgehog (Figure 2A–D). 33,34 Although these nanoparticles with various morphologies effectively enhance the local electromagnetic field, the nonuniform distribution of nanoparticles will lead to uneven and unstable SERS signals.…”

Section: Smart Design Of Noble Metal Substratesmentioning

confidence: 99%

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Smart design of high‐performance surface‐enhanced Raman scattering substrates

Meng

Qiu

et al. 2021

SmartMat

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Surface‐enhanced Raman scattering (SERS) spectroscopy has renowned its fame for the ultra‐high sensitivity and single‐molecule detection ability, and listed as a fingerprint spectrum representative in various trace detection fields. Considerable efforts have been made by researchers to design high‐sensitive SERS‐active substrates ranging from noble metals to semiconductors. This review summarizes the fundamental theories for SERS technique, that is, the electromagnetic enhancement mechanism and chemical enhancement mechanism and the state‐of‐the‐art design strategies for noble metal and semiconductor substrates. It also sheds light on the effective approaches to improve the SERS activity for noble metal substrates, that is, tuning the localized surface plasmon resonance position, the assembling of hot spots, and precise controlling of nanogaps. Although charge transfer is considered as the main reason for the enhancement mechanism for semiconductors at the present stage, the underlying theoretical basis remains mysterious. This review summarized the critical points for SERS‐active substrates design and prospected the future development direction of SERS technology.

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Section: Smart Design Of Noble Metal Substratesmentioning

confidence: 99%

Section: Smart Design Of Noble Metal Substratesmentioning

confidence: 99%

Smart design of high‐performance surface‐enhanced Raman scattering substrates

Meng

Qiu

et al. 2021

SmartMat

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“…The deviation from the facet control and the site-selective growth at the edge of each fragment are the characteristics of active surface growth. 13…”

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confidence: 99%

From flat to deep concave: an unusual mode of facet control

Yang

Zheng

et al. 2022

Chem. Commun.

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“…As a result, the conventional Au@Ag core–shell structure was transformed into Au–Ag Janus structures with different wetting degrees of Ag on Au . This strategy is also well-worked in tuning the Au–Au interface, leading to the formation of Au–Au hybrid structures with blackbody properties. − We believe that the strong ligand control can also be extended to transition metals (TM) in synthesizing Au–TM Janus structures.…”

Section: Introductionmentioning

confidence: 99%

Tuning Au–Cu Janus Structures through Strong Ligand-Mediated Interfacial Energy Control

Jia

et al. 2022

Chem. Mater.

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Bimetallic Janus structures are of great importance as their fantastic properties arise from the physical separation and the synergistic effects of the composed materials. Currently, the effective control of the Janus structure still remains a challenge compared to that of the conventional core−shell configuration and thus is highly desired. In this work, strong thiol ligands were used for tuning the interfacial energy between the Au seeds and the Cu deposit to induce the transformation of the Au−Cu core−shell to the asymmetric Janus structures. As a result of effective ligand control, a series of Au−Cu Janus structures using Au nanospheres, Au nanorods, and triangular Au nanoplates as seeds were successfully obtained. Most importantly, the Janus degree of the Au−Cu Janus structures can be readily tuned by varying the molecular structure and the amount of thiol ligands. We believe that the effective strong ligand-mediated interfacial energy control achieved in the Au−Cu system could tune bimetallic Janus structures with different metal−metal combinations, which would help in the precise control of bimetallic nanostructures. In addition, further exploration of the strong ligand control in multicomponent systems may open new doors toward the design and synthesis of sophisticated functional nanomaterials with promising properties.

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Designing caps for colloidal Au nanoparticles

Abstract: We show that active surface growth is an effective method to create structural variety in the appending domain of Au seeds. The dynamic competition between the growth sites led to different Au hats on seeds.

Cited by 21 publications

References 38 publications

Smart design of high‐performance surface‐enhanced Raman scattering substrates

Smart design of high‐performance surface‐enhanced Raman scattering substrates

From flat to deep concave: an unusual mode of facet control

Tuning Au–Cu Janus Structures through Strong Ligand-Mediated Interfacial Energy Control

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