A study on a hybrid SERS substrates based on arrayed gold nanoparticle/graphene/copper cone cavities fabricated by a conical tip indentation

Zhang, Jingran; Lu, Sheng Guo; Shi, Guangfeng; Xie, Wenkun; Geng, Yanquan; Wang, Zuobin

doi:10.1016/j.jmrt.2022.12.001

Cited by 36 publications

(7 citation statements)

References 46 publications

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“…In a comprehensive view, in-LAT with 40w laser not only makes the surface quality of tungsten carbide worse after processing, but also makes the tool seriously wear. This is because the existence of material surface roughness causes heat accumulation [15], and when the laser power is selected too high, it will form thermal damage to the material surface, and the excessive temperature will aggravate the tool wear, so it is necessary to select the laser power reasonably in the actual processing. Based on this, a feedback control module is considered to be added to the subsequent experimental processing to adjust the magnitude of the added laser power by real-time monitoring of the processing area temperature, so as to further reduce tool wear while ensuring the processing quality.…”

Section: The Analysis Of Tool Wearmentioning

confidence: 99%

Experimental study on in-situ laser-assisted turning of tungsten carbide by diamond tool

Zou,

Shi,

Zhang

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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The conventional single-point diamond turning of tungsten carbide has low efficiency and serious tool wear. Therefore, in this paper, a self-designed in-situ laser-assisted turning device was used to machine tungsten carbide, and the effects of spindle speed and laser power on the machined surface quality were investigated in the machining. The experimental results show that the machined surface quality becomes better as the spindle speed increases, and the laser-assisted turning can improve the machined surface quality, but the excessive laser power will cause surface damage and tool wear.

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Section: The Analysis Of Tool Wearmentioning

confidence: 99%

Experimental study on in-situ laser-assisted turning of tungsten carbide by diamond tool

Zou,

Shi,

Zhang

et al. 2023

Ninth International Conference on Mechanical Engineering, Materials, and Automation Technology (MMEAT 2023)

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“…31 Particularly, atomic force microscopy (AFM) tip-based nanoscratching has the merits of high machining precision and processing efficiency due to the direct mechanical machining characteristic. Furthermore, SERS substrates, including nanodots 32,33 and periodic nanograting, 34 have been prepared by the AFM tip-based scratching technique. However, the depth-to-width ratio of the machined nanostructures is fixed due to the limitation of the tip shape, which is unsuitable for improving their performance.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Chiral Nanostructures through Vibration-Assisted Scratching Combined with Wet Etching for Surface-Enhanced Raman Scattering Substrates

Wang

Yan

Geng

2023

ACS Appl. Nano Mater.

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A fabrication technique is proposed based on tip-based ultrasonic vibration-assisted scratching (UVAS) combined with wet chemical etching. UVAS induced a deeper subsurface damage of the machined nanostructure than the conventional scratching (CS), obtaining a high depth-to-width ratio nanostructure after hydrofluoric acid etching. Furthermore, the tip wear for UVAS was lesser than that for CS owing to the small friction of UVAS. Furthermore, periodic nanograting structures, nanodot arrays, and chiral nanostructures were machined by controlling the UVAS trajectory. Moreover, surface-enhanced Raman scattering (SERS) substrates with nanodot arrays and chiral structures were prepared based on the transferred polydimethylsiloxane (PDMS) model after Au deposition. It was found that a large depth-to-width ratio SERS substrate contributed to a high enhancement of the Raman signal. A maximum enhancement factor of 4.03 × 105 could be obtained on an optimal nanodot array SERS substrate when measuring 10–5 mol/L rhodamine 6G (R6G). The circular dichroism (CD) spectra of the chiral nanostructures were revealed through the finite element method simulation. Moreover, the multipole resonance led to the CD enhancement of the chiral nanostructures. Furthermore, the chiral enantiomers (l- and d-cysteines) were tested with the SERS-active chiral nanostructures, which can be recognized using the chiral SERS substrates directly. Thus, the proposed method showed great potential in chiral applications such as chiral sensing and label-free detection.

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“…If this feature is applied to outdoor pole cables it will reduce the circuit failure caused by the snow and ice in winter [11]. In recent years, through extensive research, scholars have discovered that incorporating multi-scale microstructures on surfaces can significantly enhance their performance in various applications [12]. However, preparing multi-scale microstructure surfaces with controllable morphology has always been a problem for scholars.…”

Section: Introductionmentioning

confidence: 99%

An investigation on the adhesion of dual-scale micro-nano composite structure on the surface of aluminum

Yang¹,

Shi²,

Zhang³

et al. 2023

Surf. Topogr.: Metrol. Prop.

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Adhesion is a crucial characteristic of hydrophobic surfaces that significantly impacts their practical applications. This paper proposes an innovative method for preparing a dual-scale micro-nano composite structure surface by combining mechanical ruling and anodic oxidation, which demonstrates great potential in enhancing hydrophobic surface properties. Through the analysis of the influence of micro-groove depth on the adhesion of hydrophobic surfaces, it has been discovered that micro-groove dimensions can be used to control surface adhesion while maintaining hydrophobicity, without complex chemical modifications. These findings present a promising approach for tailoring the properties of hydrophobic surfaces to suit specific applications. Compared with the single-scale micro-groove array structures, the surface roughness of the dual-scale micro-nano composite structures is significantly increased, and the contact angle of the water droplet is significantly increased. At the same time, the hydrophobicity and adhesion of the surface of the dual-scale micro-nano composite structures were analyzed. The results show that after anodizing, the contact angle of the dual-scale micro-nano composite structure surface increases, and the surface adhesion can be controlled by adjusting the structural parameters of the micro-groove and the anodizing process parameters, to ensure that the surface presents hydrophobic property while realizing the controllable adhesion of the hydrophobic surface. In this paper, dual-scale micro-nano composite structures fabricated by the composite method have achieved hydrophobic properties, and the surface adhesion can be effectively controlled by adjusting the processing parameters. This method has certain reference significance for the preparation of the controllable adhesive hydrophobic surface and lays a foundation for the further study of the controllable adhesive hydrophobic surface.

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A study on a hybrid SERS substrates based on arrayed gold nanoparticle/graphene/copper cone cavities fabricated by a conical tip indentation

Cited by 36 publications

References 46 publications

Experimental study on in-situ laser-assisted turning of tungsten carbide by diamond tool

Experimental study on in-situ laser-assisted turning of tungsten carbide by diamond tool

Fabrication of Chiral Nanostructures through Vibration-Assisted Scratching Combined with Wet Etching for Surface-Enhanced Raman Scattering Substrates

An investigation on the adhesion of dual-scale micro-nano composite structure on the surface of aluminum

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