Formation of 300 nm period pore arrays by laser interference lithography and electrochemical etching

Liu, Jia; Kleimann, P.; Laffite, Guillaume; Jamois, Cécile; Orobtchouk, Régis

doi:10.1063/1.4907620

Cited by 4 publications

(1 citation statement)

References 24 publications

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“…A recent study has shown that the relative dimensions of the pore and analyte determine intensity of the detection signal . Several methods, including focused electron and ion beams, electrochemical etching, and embedding of proteins directly into lipid membranes, have been developed for the construction of solid-state and biological nanopores and nanochannels. ,, Despite the design flexibility of synthetic nanopores and precision of biological nanopores, these structures are unlikely to be applied in more complicated protein sequencing because the conventional detection of ionic current cannot identify 20 different amino acids. One approach to this challenge is to fabricate size-controllable small nanopores with additional optical or spectroscopic activity to assist the identification of species within the nanopores.…”

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Size-Controllable Gold Nanopores with High SERS Activity

et al. 2017

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Nanopore structures have been successfully employed in next-generation DNA sequencing. For more complicated protein which normally contains 20 different amino acids, identifying the fluctuation of ionic current caused by different amino acids appears inadequate for protein sequencing. Therefore, it is highly desirable to develop size-controllable nanopores with optical activity that can provide additional structural information. Herein, we discovered the novel nanopore properties of the self-assembled ultramicroelectrodes originally developed by Bard and co-workers. Using a slightly modified method, the self-assembly of 7 ± 1 nm gold nanoparticles (AuNPs) can be precisely controlled to form a gold nanoporous sphere (GPS) on the tip of a glass capillary. Different dithiol linker molecules (1,3-propanedithiol, C3; 1,6-hexanedithiol, C6; and 1,9-nonanedithiol, C9) reproducibly led to rather similar nanopore sizes (5.07 ± 0.02, 5.13 ± 0.02, and 5.25 ± 0.01 nm), respectively. The GPS nanostructures were found to exhibit high ionic current rectification as well as surface-enhanced Raman scattering (SERS) activity due to the presence of nanopores and numerous "hot spots" among the cross-linked AuNPs on the surface of GPS. The rectification effect of the small nanopores was observed even under high concentration of electrolyte (290 mM), along with SERS enhancement factors well above 1 × 10. The GPS nanostructures were successfully applied for SERS-based detection of glutathione from a single HeLa cell.

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Size-Controllable Gold Nanopores with High SERS Activity

et al. 2017

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3.8 Laser-Based 3D Printing and Surface Texturing

Selimis

Farsari

2017

Comprehensive Materials Finishing

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Influence of periodic texture profile and parameters for enhanced light absorption in amorphous silicon ultra-thin solar cells

Joseph

2017

Appl. Opt.

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We have investigated the antireflection and light trapping properties of two-dimensional grating arrays in the hexagonal symmetry with various texture morphologies. Optical simulation based on finite-difference time-domain (FDTD) analysis is carried out to understand the role of the structure profile for different periodicities and heights to achieve enhanced light trapping. The considered active medium of interest is 200-nm-thick hydrogenated amorphous silicon. Although the considered texture profiles possess an incremental change of refractive index from incident medium to active medium, a parabolic-shaped front side texture provides better antireflection effects owing to its high diffraction efficiencies in the higher-order modes as compared to other pattern morphologies. In the back side texture, the parabolic-shaped pattern also dominates with better light trapping efficiencies due to its ability to distribute a major amount of diffracted energy in the higher-order modes. The average reflection calculations in the wavelength range of 300-800 nm confirm that in both side textures, a periodicity of 500 nm with a height of 200 nm can be preferentially recommended for less reflection loss and improved scattering in oblique angles. The quantum efficiency calculation verifies that a device designed with these optimized parameters can offer improved efficiency for ultra-thin solar cells.

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Formation of 300 nm period pore arrays by laser interference lithography and electrochemical etching

Abstract: Articles you may be interested inPeriodic antireflection surface structure fabricated on silicon by four-beam laser interference lithography J. Laser Appl. 26, 012010 (2014); 10.2351/1.4849715 Fabrication of high-density ordered nanoarrays in silicon dioxide by MeV ion track lithography

Cited by 4 publications

References 24 publications

Size-Controllable Gold Nanopores with High SERS Activity

Size-Controllable Gold Nanopores with High SERS Activity

3.8 Laser-Based 3D Printing and Surface Texturing

Influence of periodic texture profile and parameters for enhanced light absorption in amorphous silicon ultra-thin solar cells

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