High‐Performance SERS Substrate Based on Hierarchical 3D Cu Nanocrystals with Efficient Morphology Control

Zhao, Xiaohui; Deng, Min; Rao, Gaofeng; Yan, Yan; Wu, Chunyang; Jiao, Yu; Deng, Anqing; Yan, Chaoyi; Huang, Jianwen; Wu, Songhao; Chen, Wei; Lei, Tianyu; Xu, Ping; He, Weidong; Xiong, Jie

doi:10.1002/smll.201802477

Cited by 52 publications

(35 citation statements)

References 47 publications

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“…[40] Thec haracteristic peaks at 932.3 eV and 952.2 eV correspond to the Cu 2p 3/2 and Cu 2p 1/2 orbitals of Cu + with the shoulder peaks at 934.3 eV and 954.2 eV confirming the presence of Cu 2+ (Figure 4b). [41][42][43] TheCu2pspectrum shifts to alower binding energy compared with Cu 1.81 S, indicating the electron-rich state. [44] Thep eak shifts in the XPS spectra of Co and Cu suggest that the incorporated Cu-S species might act as electronic donors in CoO/Co-Cu-S-2.…”

Section: Angewandte Chemiementioning

confidence: 99%

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

Lou

2019

Angewandte Chemie

103

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Hierarchical hollow structures for electrode materials of supercapacitors could enlarge the surface area, accelerate the transport of ions and electrons, and accommodate volume expansion during cycling. Besides, construction of heterostructures would enhance the internal electric fields to regulate the electronic structures. All these features of hierarchical hollow heterostructures are beneficial for promoting the electrochemical properties and stability of electrode materials for high‐performance supercapacitors. Herein, CoO/Co‐Cu‐S hierarchical tubular heterostructures (HTHSs) composed of nanoneedles are prepared by an efficient multi‐step approach. The optimized sample exhibits a high specific capacity of 320 mAh g−1 (2300 F g−1) at 2.0 A g−1 and outstanding cycling stability with 96.5 % of the initial capacity retained after 5000 cycles at 10 A g−1. Moreover, an all‐solid‐state hybrid supercapacitor (HSC) constructed with the CoO/Co‐Cu‐S and actived carbon shows a stable and high energy density of 90.7 Wh kg−1 at a power density of 800 W kg−1.

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Section: Angewandte Chemiementioning

confidence: 99%

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

Lou

2019

Angewandte Chemie

103

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“…In recent years, SPR effect‐modified photodetectors have attracted many interest for their enhanced light absorption and detection sensitivity . Wu et al designed 2D + 0D photodetectors based on Ag shell‐isolated nanoparticles (SHIN)‐decorated MoS 2 .…”

Section: Two‐dimensional Heterostructuresmentioning

confidence: 99%

“…47 In recent years, SPR effect-modified photodetectors have attracted many interest for their enhanced light absorption and detection sensitivity. 32,[105][106][107][108][109] Wu et al 110 designed 2D + 0D photodetectors based on Ag shell-isolated nanoparticles (SHIN)-decorated MoS 2 . Due to the large localized SPR effect, the PL intensity and photoresponse of the monolayer MoS 2 were dramatically enhanced.…”

Section: Multidimensional Semi-2dhmentioning

confidence: 99%

Two‐dimensional heterostructure promoted infrared photodetection devices

Rao

Wang

et al. 2019

InfoMat

Self Cite

123

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It is a rapidly developed subject in expanding the fundamental properties and application of two‐dimensional (2D) materials. The weak van der Waals interaction in 2D materials inspired researchers to explore 2D heterostructures (2DHs) based broadband photodetectors in the far‐infrared (IR) and middle‐IR regions with high response and high detectivity. This review focuses on the strategy and motivation of designing 2DHs based high‐performance IR photodetectors, which provides a wide view of this field and new expectation for advanced photodetectors. First, the photocarriers' generation mechanism and frequently employed device structures are presented. Then, the 2DHs are divided into semimetal/semiconductor 2DHs, semiconductor/semiconductor 2DHs, and multidimensional semi‐2DHs; the advantages, motivation, mechanism, recent progress, and outlook are discussed. Finally, the challenges for next‐generation photodetectors are described for this rapidly developing field.

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“…Figure 6B illustrates SEM views of the microareas of the three types of substrates. To study the relationship between Raman EFs and different morphologies, the effects of the diameter of NP and nanogap were considered to evaluate SERS performance [55]. The size and spacing of Au NPs significantly affect local surface plasmon resonance.…”

Section: Highly Sensitive and Tunable Sers Applications For Au Npsmentioning

confidence: 99%

Shaped femtosecond laser induced photoreduction for highly controllable Au nanoparticles based on localized field enhancement and their SERS applications

Jiang

et al. 2020

Nanophotonics

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Gold nanoparticles (Au NPs) have a wide range of applications because of their localized surface plasmon resonance properties. Femtosecond laser is considered to be an effective method for preparing Au NPs because of its characteristics of ultrashort irradiation periods and ultrahigh intensities. In this study, a novel method is proposed to produce an Au NP-attached substrate using the spatially and temporally shaped femtosecond laser. Laser-induced periodic surface structures (LIPSS) are designed to obtain the localized optical field enhancement, which leads to the femtosecond laser spatially reshaping, enabling the deposition of Au NPs by photoreduction on silicon substrates. The Au NPs prepared by this method exhibit morphological controllability and chemical stability, especially excellent spatial selectivity and uniformity, resulting in the tunable and stable surface-enhanced Raman scattering (SERS) applications. Also, the temporally shaped femtosecond pulses are introduced to further increase the enhancement factors of the SERS. This method successfully achieves the controllable morphology synthesis and selective deposition of Au NPs on the substrate simultaneously, which provides a promising candidate for SERS substrates fabrication, and holds potential applications in optoelectronics, such as molecular detection and biosensors.

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High‐Performance SERS Substrate Based on Hierarchical 3D Cu Nanocrystals with Efficient Morphology Control

Cited by 52 publications

References 47 publications

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

Construction of CoO/Co‐Cu‐S Hierarchical Tubular Heterostructures for Hybrid Supercapacitors

Two‐dimensional heterostructure promoted infrared photodetection devices

Shaped femtosecond laser induced photoreduction for highly controllable Au nanoparticles based on localized field enhancement and their SERS applications

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