The Five Ws (and one H) of Super-Hydrophobic Surfaces  in Medicine

Gentile, Francesco; Coluccio, Maria Laura; Limongi, Tania; Perozziello, Gerardo; Candeloro, Patrizio; Fabrizio, E. Di

doi:10.3390/mi5020239

Cited by 11 publications

(12 citation statements)

References 72 publications

(103 reference statements)

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“…Therefore, this method is solution-wasteful and time-consuming, moreover, it is incompetent to identify weakadsorptive molecules, especially for limited organic solutions of target molecules. [ 48 ] Therefore, it is an urgent issue to develop a facile, rapid route to detect the organic molecules by SERS enhancement without solution saving.…”

Section: Introductionmentioning

confidence: 99%

Spherical Nanoparticle Arrays with Tunable Nanogaps and Their Hydrophobicity Enhanced Rapid SERS Detection by Localized Concentration of Droplet Evaporation

Zhang

Zhou

Liu

et al. 2015

Adv Materials Inter

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Their properties are usually dependent on morphologies and sizes, and hence the fabrication of controllable uniform micro/nanostructured arrays on a large-scale becomes more important. Conventional methods for obtaining periodical nanostructured arrays are lithographic techniques including laser lithography, [ 26,27 ] electron-beam lithography, [28][29][30] X-ray lithography, [ 31 ] atomic force microscope lithography, [ 32 ] scanning tunneling microscopy technology, [ 33 ] and so on. However, these techniques can not be afforded to most laboratories because of their high processing costs and lower production effi ciency. [ 34 ] In recent decades, with fast development of colloidal science and self-assembly technology, large-scaled monolayer colloidal crystals can be fabricated using highly monodispersed colloidal spheres. [ 35 ] Based on this achievement, another alternative method, colloidal lithography, has been well developed to fabricate multiform periodic micro/nanostructured arrays (i.e., nanoparticle arrays, nanobowl arrays, nanoring arrays, and nanopillar arrays) using these monolayer colloidal crystals as templates or masks [36][37][38][39] by chemical routes including solution-dipping strategy, wet chemical etching, and electrochemical deposition. [40][41][42][43] Such periodic micro/nanostructured array fi lms generally have special rough surfaces, which can be used as SERS-active substrates for detection and identification of organic molecules with trace concentrations. Although chemical routes based on colloidal templates possess advantages of the simple operation, low processing costs, it is still quite diffi cult to achieve micro/nanostructured arrays with very uniform morphology on large-scale by above routes. If these micro/ nanostructured arrays are applied as active substrates in SERS detection, the intensity of SERS spectra in different areas on the sample will fl uctuate in a large range, leading to the failure in practical applications. Whereas other parallel routes, based on physical process method, such as sputtering deposition, pulsed laser deposition, thermal evaporation deposition, atomic layer deposition, and so on, combining with monolayer colloidal crystals template can well resolve these problems. [ 44 ] SERS enhancement activities are mainly dependent on chemical enhancement or local electromagnetic fi eld enhancement at nanoscaled protrusions and cavities. For the latter case, the Periodic hexagonal spherical nanoparticle arrays are fabricated by a sacrificial colloidal monolayer template route by chemical deposition and further physical deposition. The regular network-structured arrays are fi rst templated by colloidal monolayers and then they are changed to novel periodic spherical nanoparticle arrays by further sputtering deposition due to multiple direction deposition and shadow effect between adjacent nanoparticles. The nanogaps between two adjacent spherical nanoparticles can be well tuned by controlling deposition time. Such periodic nanoparticle arrays with gold coatings ...

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Section: Introductionmentioning

confidence: 99%

Spherical Nanoparticle Arrays with Tunable Nanogaps and Their Hydrophobicity Enhanced Rapid SERS Detection by Localized Concentration of Droplet Evaporation

Zhang

Zhou

Liu

et al. 2015

Adv Materials Inter

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“…The extremity of the molecule can, for example, be functionalized with biotin that can interact specifically with Streptavidin previously bound to a surface [4]. Here we briefly present a new application of the devices presented in [5][6][7][8][9][10][11] where no DNA modification is required. The method relies on the selfaggregation of DNA on teflonated super hydrophobic Silicon textured surface.…”

Section: Introductionmentioning

confidence: 99%

Stable Stretched Suspended DNA Molecules

Moretti¹,

Limongi²

2016

Adv Genet Eng

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“…Superhydrophobic substrates represent a novel platform for the controlled deposition of nanomaterials . Recently, controlled motion of the three phase contact line (TCL) of liquid drops loaded with nanomaterials on superhydrophobic substrates has enabled the fabrication of suspended NWs.…”

Section: Introductionmentioning

confidence: 99%

Writing and Functionalisation of Suspended DNA Nanowires on Superhydrophobic Pillar Arrays

Miele

Accardo

Falqui

et al. 2014

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Nanowire arrays and networks with precisely controlled patterns are very interesting for innovative device concepts in mesoscopic physics. In particular, DNA templates have proven to be versatile for the fabrication of complex structures that obtained functionality via combinations with other materials, for example by functionalisation with molecules or nanoparticles, or by coating with metals. Here, the controlled motion of the a three-phase contact line (TCL) of DNA-loaded drops on superhydrophobic substrates is used to fabricate suspended nanowire arrays. In particular, the deposition of DNA wires is imaged in situ, and different patterns are obtained on hexagonal pillar arrays by controlling the TCL velocity and direction. Robust conductive wires and networks are achieved by coating the wires with a thin layer of gold, and as proof of concept conductivity measurements are performed on single suspended wires. The plastic material of the superhydrophobic pillars ensures electrical isolation from the substrate. The more general versatility of these suspended nanowire networks as functional templates is outlined by fabricating hybrid organic-metal-semiconductor nanowires by growing ZnO nanocrystals onto the metal-coated nanowires.

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The Five Ws (and one H) of Super-Hydrophobic Surfaces in Medicine

Cited by 11 publications

References 72 publications

Spherical Nanoparticle Arrays with Tunable Nanogaps and Their Hydrophobicity Enhanced Rapid SERS Detection by Localized Concentration of Droplet Evaporation

Spherical Nanoparticle Arrays with Tunable Nanogaps and Their Hydrophobicity Enhanced Rapid SERS Detection by Localized Concentration of Droplet Evaporation

Stable Stretched Suspended DNA Molecules

Writing and Functionalisation of Suspended DNA Nanowires on Superhydrophobic Pillar Arrays

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