Fabrication of gold nanodot arrays on a transparent substrate as a nanobioplatform for label-free visualization of living cells

Jung, Mi; El‐Said, Waleed A.; Choi, Jeong‐Woo

doi:10.1088/0957-4484/22/23/235304

Cited by 33 publications

(28 citation statements)

References 44 publications

(65 reference statements)

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“…Very thin nanoporous alumina mask in large dimension was prepared by two-time wet chemical etching. 18 After the second anodization, the aluminum oxide layer was slightly etched in 5 wt.% H 3 PO 4 solution at 30°C. Subsequently, a protecting layer on the surface of the aluminum oxide layer was coated, and the remaining aluminum substrate was completely removed using saturated HgCl 2 solution.…”

Section: Preparation Of Nanoporous Alumina Mask and Ag Nanodot Arraymentioning

confidence: 99%

“…The fabrication technique of nanostructured surface using the nanoporous alumina mask has several advantages such as reproducibility, stability, and low cost. Many kinds of nanostructures including nanoholes, 15 nanorods, 16 and nanodots [17][18][19][20] have been fabricated using nanoporous alumina masks. Particularly, the nanoporous alumina mask has been used as an evaporation mask to fabricate various nanodot arrays.…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, the nanoporous alumina mask has been used as an evaporation mask to fabricate various nanodot arrays. [17][18][19][20][21] So far, there has been intensive research on the fabrication of nanodot arrays on a substrate, but little effort has focused on the height of Au nanodots for maximizing the efficiency of SERS. 21 The advantage of using the nanoporous alumina mask for the preparation of metal nanostructure for SERS is the controllability of the dimension of metal nanodot.…”

Section: Introductionmentioning

confidence: 99%

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Ag nanodot array as a platform for surface-enhanced Raman scattering

Jung¹,

Kim²,

Lee³

et al. 2013

J. Nanophoton

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Well-ordered Ag nanodot array on indium-tin-oxide (ITO) glass is adopted as a sensor platform based on surface-enhanced Raman scattering (SERS). SERS has attracted extensive attention in the development of sensitive chemical or biological sensors due to its property of the amplification of electromagnetic fields on a metal nanostructure. The key issue for the applications of SERS is to secure the fabrication technique of a noble metal nanostructured surface. For an SERS-active surface with stability and reproducibility, a Ag nanodot array is fabricated on the ITO glass using a nanoporous alumina mask with uniform through holes. The signal intensity of SERS from methylene blue (MB) adsorbed on the Ag nanodot array showed much stronger scattering than the one from the Ag film of 50-nm thick. The SERS intensity on the Ag nanodot array is consistently enhanced by increased concentration of MB. These results confirm that the Ag nanodot array on ITO glass can be utilized as a stable platform for the sensitive detection of chemical materials based on SERS. © The Authors.Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Preparation Of Nanoporous Alumina Mask and Ag Nanodot Arraymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ag nanodot array as a platform for surface-enhanced Raman scattering

Jung¹,

Kim²,

Lee³

et al. 2013

J. Nanophoton

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“…The structure of porous alumina layer is close-packed hexagonal columnar cell array containing a central pore normal to the aluminum substrate. Removing the barrier alumina layer on the aluminum, the nanoporous alumina mask with through-holes has been widely used as an evaporation mask to fabricate various kinds of nanodot arrays [13][14][15][16][17]. The nanoporous alumina mask plays an important role in the fabrication of nanodot array.…”

Section: Introductionmentioning

confidence: 99%

“…The fabrication of size-controlled Ag nanodot is dependent on the pore diameter with thorough removal of the barrier layer of the AAO mask. In this work, we fabricated size-controlled Ag nanodot arrays via the AAO mask with through-holes by two-time dipping process in chemical wet etching solution [17]. The plasmonic property of size-controlled Ag nanodot array on indium-tin-oxide (ITO ) glass was examined by ultraviolet-visible (UV-Vis) spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and optical properties of size-controlled Ag nanodot array via nanoporous alumina mask

Jung

Kim

Lee

et al. 2012

2012 12th IEEE International Conference on Nanotechnology (IEEE-NANO)

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Ag nanostructure has been widely used for optical sensing applications for localized surface plasmon resonance (LSPR). Many efforts have been tried to fabricate and control silver nanostructure. The pore diameter of the nanoporous alumina mask with through-holes was controlled by two-time dipping in 5 wt% phosphoric acid at 30 'C . Using the nanoporous alumina mask as an evaporation mask, size-controlled Ag nanodot arrays were directly formed on indium-tin-oxide coated glass. With this process, Ag nanodot arrays with different size (42 nm, 60 nm, 80 nm) could be fabricated in periodic patterns with same separation distance of 105 nm. A large area Ag nanodot array was fabricated from the hard-won alumina mask. Their LSPR properties are examined by UV-vis extinction spectroscopy.

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Plasma‐Etched Nanosphere Conductivity‐Inverted Lithography (PENCIL): A Facile Fabrication of Size‐Tunable Gold Disc Array on ITO‐Coated Glass

Ngamaroonchote

Muangnapoh

Aroonyadet

et al. 2018

Adv Materials Inter

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Nanosphere lithography is employed to simply fabricate metallic hexagonal nanohole array based on metal deposition within interstices of the nanospheres. In contrast, fabrication of nanodisc array (inverted pattern of nanohole array) unavoidably includes an additional step of creating a patterned resist layer or the use of high‐resolution lithography techniques. In this work, a facile method named “plasma‐etched nanosphere conductivity‐inverted lithography (PENCIL)” is developed to fabricate gold disc arrays on indium tin oxide (ITO)‐coated glass by simply incorporating plasma etching of nanosphere lithographic mask and electrodeposition of metal. The hexagonal close‐packed polystyrene (PS) spheres are served as mask for blocking an interaction of oxygen plasma and ITO surface. Topographic images and current mappings reveal different thicknesses and conductivities of plasma‐etched ITO surface. The exposed surface (gap area) exhibits higher resistivity compare with the area protected by spheres. As a result, site‐selective electrodeposition of gold is produced on patterned substrate. The microdiscs size, as well as the size and density of nanoparticles situated within the disc area can be tuned via etching and electrodeposition conditions. This suggests a simple, low‐cost, and high‐throughput technique, which potentially facilitate the expansive use of metal disc array in studying the structural dependent properties of nanomaterials.

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Fabrication of gold nanodot arrays on a transparent substrate as a nanobioplatform for label-free visualization of living cells

Cited by 33 publications

References 44 publications

Ag nanodot array as a platform for surface-enhanced Raman scattering

Ag nanodot array as a platform for surface-enhanced Raman scattering

Fabrication and optical properties of size-controlled Ag nanodot array via nanoporous alumina mask

Plasma‐Etched Nanosphere Conductivity‐Inverted Lithography (PENCIL): A Facile Fabrication of Size‐Tunable Gold Disc Array on ITO‐Coated Glass

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