Entrapment of dye molecules within submicron silver particles

Yosef, Itzik; Avnir, David

doi:10.1007/s11051-011-0315-1

Cited by 11 publications

(6 citation statements)

References 31 publications

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“…This observation shows that the interaction between the Th and the gold surface takes place at the early stages of the entrapment process, in agreement with previous entrapment observations. 7,10,12 Films characterization by X-rays spectroscopies An important question to ask was weather the entrapment affects the crystallographic characteristics of the elementary metal nanocrystals. To answer this question, comparative X-ray diffraction (XRD) pattern analyses were performed.…”

Section: Films Characterization By Microscopymentioning

confidence: 99%

“…The metal-doping electroless process is based on reduction of the metal cation in the presence of the desired organic molecule, 6,7 a recently developed methodology which proved useful for the preparation of powders of composite organics@metals. [8][9][10][11] Down-scaling efforts of this molecules@metals powders methodology included the entrapment of Congo-red within small silver particles which were then also dip-coated on ITO glass 12 or adsorbed on ceramic bres. 13 Of relevance to this report is also to mention the system of sandwich morphology (silver lm/molecules/silver nano-particles), 14 the co-sublimation of rubrene and magnesium, 15 the co-deposition of Rh or Ir with glucose, 16 the formation of a Pt layer on a gold electrode modied by an aryl-thiol monolayer, 17 the placing of 4-mercaptobenzoic acid molecules between Au and Ag in core-shell nanoparticles 18 and the formation of thionin/nanogold multilayer lms using as an electrochemical immunoassay.…”

Section: Introductionmentioning

confidence: 99%

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Electroless methods for molecular doping of gold thin films

Naor

Avnir

2014

J. Mater. Chem. C

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We developed electroless-based methods for entrapping molecules within gold thin films, molecule@Au. These doping procedures extend the potential library electroless formed films much beyond its classical application of pure metals. A detailed study shows that adsorption on gold films and entrapment within it provide distinctly different modified thin films. Significantly, molecules that cannot be adsorbed, do form an organic-metallic hybrid by the developed entrapment processes. We also report on the ability to observe enhanced Raman and fluorescence spectra from the dopant molecules within the gold thin films.

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Section: Films Characterization By Microscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electroless methods for molecular doping of gold thin films

Naor

Avnir

2014

J. Mater. Chem. C

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“…[8][9][10][11][12] Many applications-practically all across chemistry-have been demonstrated. [13][14][15][16][17][18][19] In brief, the entrapment process involves a room temperature metal synthesis by chemical reduction of the metal cation, in either aqueous 8 or organic phases, 16 with either a homogenous 8 (solvent-soluble) or heterogeneous 9,10 (solvent-insoluble) reducing agent, carried out in the presence of the desired organic dopant molecule. The entrapped molecules reside within closed and narrow pores formed during the growth and aggregation of the metal crystallites, and remain intact upon entrapment.…”

Section: Introductionmentioning

confidence: 99%

Bioactive doped metals: high synergism in the bactericidal activity of chlorhexidine@silver towards wound pathogenic bacteria

2013

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The entrapment of chlorhexidine (CH) within metallic silver (CH@Ag) results in a composite material bearing powerful synergetic bactericidal action towards two opportunistic wound pathogenic bacteria, the Gram-negative Pseudomonas aeruginosa and the Gram-positive Staphylococcus epidermidis. TEM and STEM imaging revealed morphological abnormalities in bacteria exposed to the composite. Release profiles of the active ingredients, CH and ionic silver, from the composite were evaluated by UV spectroscopy and by ICP-MS elemental analysis, and indicated that the strong bactericidal effects were associated with their co-release and presence in the solution. The use of both powder form and pressed form of CH@Ag provides means to control the release kinetics of entrapped CH from the composite and demonstrates the potential application of such composites in wound treatments.

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“…In recent years, functional colloidal particles have drawn considerable interest owing to their remarkable physicochemical properties. Thanks to their controllable size, large specific surface area, and easy dispersion/manipulation, colloidal particles have been widely used as templates or hosts for the loading of functional molecules, quantum dots, and/or metal nanocrystals . In particular, colloidal particles encapsulated with organic luminophors have emerged as a class of promising and highly sensitive indictors for the purpose of sensing and imaging .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Pressure and Temperature Dual‐Responsive Polystyrene Microbeads

Zhu

Deng

Zeng

et al. 2013

Part & Part Syst Charact

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A facile approach to the synthesis of pressure and temperature dual‐responsive polystyrene (PS) microbeads with controlled sizes via dispersion polymerization is described. Three different luminophors are selected and directly introduced into the reaction system and thus incorporated into the resultant PS microbeads during polymerization. By manipulating the reaction conditions, including concentrations of the initiator and monomer, polarity of the reaction medium, and injection rate for the monomer, uniform PS microbeads with sizes ranging from 1 to 5 μm are obtained. When a light source centered at 365 nm is used to excite all the luminophors in the PS beads, three distinct and resolvable emission peaks corresponding well with the luminophors are observed. By taking advantage of their sensitive responses to both pressure and temperature, the PS beads can be utilized for quantitative measurements of these two stimulations simultaneously. The PS beads loaded with multiple luminophors have the ability to serve as building blocks for the fabrication of novel sensing and imaging devices and therefore provide a promising strategy for the study of aerodynamics.

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Entrapment of dye molecules within submicron silver particles

Cited by 11 publications

References 31 publications

Electroless methods for molecular doping of gold thin films

Electroless methods for molecular doping of gold thin films

Bioactive doped metals: high synergism in the bactericidal activity of chlorhexidine@silver towards wound pathogenic bacteria

Synthesis and Characterization of Pressure and Temperature Dual‐Responsive Polystyrene Microbeads

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