Poly(Vinyl Pyridine) as a Universal Surface Modifier for Immobilization of Nanoparticles

Malynych, Serhiy; Luzinov, and Igor; Chumanov, George

doi:10.1021/jp013236d

Cited by 301 publications

(313 citation statements)

References 25 publications

(30 reference statements)

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“…P2 VP exhibits strong interaction with the silicon oxide surface owing to the hydrogen bonding between the surface hydroxyl groups and nitrogen on the pyridine ring. 57 In the protonated state (below pH 4.0), the electrostatic interaction between the positively charged pyridine units and negatively charged silicon oxide surface further promotes strong anchoring to the surface. Surprisingly, simple exposure of the cross-linked gel films to pH 2.0 solution resulted in the transformation of the initially smooth morphology into a network of highly anisotropic structures, which is a subject of the current in-depth study ( Figure 1B).…”

Section: Resultsmentioning

confidence: 99%

Swelling-Induced Folding in Confined Nanoscale Responsive Polymer Gels

2010

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Mechanical instabilities such as buckling, wrinkling, creasing, and folding are commonplace in both natural and synthetic systems over a wide range of length scales. In this study, we focus on the spontaneous folding behavior of the highly swellable confined nanoscale (thickness below 100 nm) gel films resulting in the formation of a network of regularly folded structures spontaneously emerging in the course of their swelling and drying. We suggest that regular self-folding is originated from periodic instabilities (wrinkles) caused by swelling-initiated stresses under confined conditions. Furthermore, folded gel structures can be organized into regular serpentine-like manner by imposing various boundary conditions on microimprinted surfaces. We suggest that this demonstration of uniform gel to mechanically mediate morphogenesis has far-reaching implications in the creation of complex, large-area, 3D gel nanostructures.

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Section: Resultsmentioning

confidence: 99%

Swelling-Induced Folding in Confined Nanoscale Responsive Polymer Gels

2010

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“…This enables one to spread nanocrystals easily and homogeneously by e.g. spin-coating onto flat surfaces such as silicon or silicon oxide [37]. One method which is able to generate monolayered highly ordered films over vast areas is the Langmuir-Blodgett (LB) method [38].…”

Section: Introductionmentioning

confidence: 99%

Metal nanoparticle field-effect transistor

Cai

Michels

Bachmann

et al. 2013

Journal of Applied Physics

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We demonstrate that by means of a local top-gate current oscillations can be observed in extended, monolayered films assembled from monodisperse metal nanocrystals -realizing transistor function. The oscillations in this metal-based system are due to the occurrence of a Coulomb energy gap in the nanocrystals which is tunable via the nanocrystal size. The nanocrystal assembly by the Langmuir-Blodgett method yields homogeneous monolayered films over vast areas. The dielectric oxide layer protects the metal nanocrystal field-effect transistors from oxidation and leads to stable function for months. The transistor function can be reached due to the high monodispersity of the nanocrystals and the high super-crystallinity of the assembled films. Due to the fact that the film consists of only one monolayer of nanocrystals and all nanocrystals are simultaneously in the state of Coulomb blockade the energy levels can be influenced efficiently (limited screening).

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“…Three methods of metal nanoparticles deposition were used: 1) photoinduced chemical deposition of Au from aqueous salt AuCl 3 solution forming nanoparticles of various shape and size located predominantly at the tops of microrelief and, in particular, in the shape of nanowires on the ridges of quasigrating-type surface microrelief [4], 2) deposition of ca. 100 nm Ag NP from colloidal water suspension on poly(vinylpyridine) (PVP) modified the GaAs substrate (for immobilization of NP) with formation of separated NP and aggregates of NP on dielectric PVP interlayer [9], and 3) drop-coating deposition from aqua colloid solution of Au NP of 15 nm core size covered by silica shell with approximately 20-nm thickness [10]. (1) and (2) methods, respectively; p-n-GaAs structure with Au/SiO2 core-shell nanoparticles (c).…”

Section: Methodsmentioning

confidence: 99%

Metal nanoparticle-enhanced photocurrent in GaAs photovoltaic structures with microtextured interfaces

Dmitruk¹,

Borkovskaya²,

Mamontova³

et al. 2016

Nano Online

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The photocurrent enhancement effect caused by Au and Ag nanoparticles for GaAs-based photovoltaic structures of surface barrier or p-n junction type with microtextured interfaces has been investigated in dependence on the conditions of nanoparticles deposition and, respectively, on the shape and local dielectric environment of obtained nanoparticle arrays. Three nanoparticle deposition methods have been checked: 1) photoinduced chemical deposition of Au from aqueous AuCl 3 solution forming nanowires on the ridges of quasigrating-type surface microrelief, 2) deposition of Ag nanoparticles from colloidal suspension on the GaAs substrate covered with poly(vinylpyridine), and 3) drop and dry deposition of Au/SiO 2 core-shell nanoparticles from aqueous colloid solution. The comprehensive investigation of optical reflectance, photoelectric, and electrical characteristics of the fabricated barrier structures has shown the highest photovoltaic parameters for surface microrelief of quasigrating-type and electroless Au nanoparticle deposition. The analysis of characteristics obtained allowed us also to define the mechanisms of the total photocurrent enhancement.

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Poly(Vinyl Pyridine) as a Universal Surface Modifier for Immobilization of Nanoparticles

Cited by 301 publications

References 25 publications

Swelling-Induced Folding in Confined Nanoscale Responsive Polymer Gels

Swelling-Induced Folding in Confined Nanoscale Responsive Polymer Gels

Metal nanoparticle field-effect transistor

Metal nanoparticle-enhanced photocurrent in GaAs photovoltaic structures with microtextured interfaces

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