A SERS‐Active Nanocrystalline Pd Substrate and its Nanopatterning Leading to Biochip Fabrication

Bhuvana, Thiruvelu

doi:10.1002/smll.200701075

Cited by 31 publications

(21 citation statements)

References 53 publications

(68 reference statements)

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“…As can be seen from Figure 4b, the contact angles increased in both parallel and perpendicular directions to 152° and 125° respectively. Another important characteristic of hierarchical structures is that they can enhance the Raman signal of molecules adsorbed4546. Palladium hierarchical structure is also found to enhance the Raman signal of the adsorbed thiol molecules (Figure 4c).…”

Section: Resultsmentioning

confidence: 92%

Metal hierarchical patterning by direct nanoimprint lithography

Radha

Lim

Saifullah

et al. 2013

Sci Rep

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Three-dimensional hierarchical patterning of metals is of paramount importance in diverse fields involving photonics, controlling surface wettability and wearable electronics. Conventionally, this type of structuring is tedious and usually involves layer-by-layer lithographic patterning. Here, we describe a simple process of direct nanoimprint lithography using palladium benzylthiolate, a versatile metal-organic ink, which not only leads to the formation of hierarchical patterns but also is amenable to layer-by-layer stacking of the metal over large areas. The key to achieving such multi-faceted patterning is hysteretic melting of ink, enabling its shaping. It undergoes transformation to metallic palladium under gentle thermal conditions without affecting the integrity of the hierarchical patterns on micro- as well as nanoscale. A metallic rice leaf structure showing anisotropic wetting behavior and woodpile-like structures were thus fabricated. Furthermore, this method is extendable for transferring imprinted structures to a flexible substrate to make them robust enough to sustain numerous bending cycles.

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Section: Resultsmentioning

confidence: 92%

Metal hierarchical patterning by direct nanoimprint lithography

Radha

Lim

Saifullah

et al. 2013

Sci Rep

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“…Palladium hexadecanethiolate Pd(SC 16 H 33 -n) 2 was decomposed in air at 520 K on the silicon surface to give 50-60 nm-thick nanofilms (the coating was applied by centrifugation or by spin coating) compatible with biomolecules [422] (Fig. 6.27).…”

Section: Metal Thiolates and Sulfides In The Polymer Matrixmentioning

confidence: 99%

Nanostructured Materials Preparation via Condensation Ways

Pomogailo

Джардималиева

2014

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“…Active regions extending to a few microns matching the size of the laser beam have been produced by template assisted synthesis 25 or by physical methods involving patterning. 26 However, these methods make use of sophisticated lithography techniques or involve multi-step chemical processes. What is desirable is a simple fabrication process for easily manipulated nanostructured SERS substrates.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline Ag microflowers as a versatile SERS platform

et al. 2014

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In this paper, the synthesis of Ag microflowers for use as manipulable and reusable substrates in surface enhanced Raman spectroscopy (SERS) is demonstrated, working with ultra-low volumes of the analyte. Flower-like AgBr crystallites with a growth direction of 〈110〉 were first obtained by thermolysing a complex obtained by the stabilization of (AgCl2)(-) anions with tetraoctylammonium bromide. NaBH4 reduction leads to the formation of porous Ag microflowers (50-100 μm) with interconnected nanoparticles. The coupling of the nanoparticles in the microflower results in broadband extinction from visible to IR wavelengths, facilitating SERS using both red and green wavelengths. Using thiophenol as test analyte, uniform SERS enhancement factors in the range of 10(6)-10(8) have been achieved from different parts of the microflower. The microflowers have been used for labeled and non-labeled detection of both single- and double-stranded DNA and using simple manipulation techniques, SERS data have been collected from ultra-low volumes of the analyte solution (∼0.34 nL). The reusability of the substrate for SERS over multiple cycles involving a rapid and efficient wet chemical cleaning procedure is also demonstrated. Finally, by placing the microflower in a microfluidic device, chemical reactions have been examined in situ.

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A SERS‐Active Nanocrystalline Pd Substrate and its Nanopatterning Leading to Biochip Fabrication

Cited by 31 publications

References 53 publications

Metal hierarchical patterning by direct nanoimprint lithography

Metal hierarchical patterning by direct nanoimprint lithography

Nanostructured Materials Preparation via Condensation Ways

Nanocrystalline Ag microflowers as a versatile SERS platform

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