Novel Method for the Preparation of Polymeric Hollow Nanospheres Containing Silver Cores with Different Sizes

Cheng, Darning; Zhou, Xuedong; Xia, Haibing; Chan, Hardy Sze On

doi:10.1021/cm0503230

Cited by 156 publications

(107 citation statements)

References 29 publications

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“…Cheng et al prepared Ag@polypyrrole-chitosan (PPy-CS) nanorattles by photoreduction of Ag þ with CS. [316] In this case, only the silver salt is required to diffuse into the PPy-CS nanoreactors since one component of the shells can serve as the reducing agent. Moreover, the amount of AgNO 3 loaded into the nanoreactors can be easily controlled by adjusting the pH-sensitive permeability of the polymer shells.…”

Section: Reviewmentioning

confidence: 99%

Hollow Micro‐/Nanostructures: Synthesis and Applications

2008

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Hollow micro‐/nanostructures are of great interest in many current and emerging areas of technology. Perhaps the best‐known example of the former is the use of fly‐ash hollow particles generated from coal power plants as partial replacement for Portland cement, to produce concrete with enhanced strength and durability. This review is devoted to the progress made in the last decade in synthesis and applications of hollow micro‐/nanostructures. We present a comprehensive overview of synthetic strategies for hollow structures. These strategies are broadly categorized into four themes, which include well‐established approaches, such as conventional hard‐templating and soft‐templating methods, as well as newly emerging methods based on sacrificial templating and template‐free synthesis. Success in each has inspired multiple variations that continue to drive the rapid evolution of the field. The Review therefore focuses on the fundamentals of each process, pointing out advantages and disadvantages where appropriate. Strategies for generating more complex hollow structures, such as rattle‐type and nonspherical hollow structures, are also discussed. Applications of hollow structures in lithium batteries, catalysis and sensing, and biomedical applications are reviewed.

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Section: Reviewmentioning

confidence: 99%

Hollow Micro‐/Nanostructures: Synthesis and Applications

2008

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“…After polymeriza- tion and removal of silica, spherical poly(divinyl benzene) capsules encapsulating AuNPs were fabricated. In addition, Cheng et al [6] developed a relatively simple photoreduction process to synthesize silver-encapsulated hollow polypyrrole-chitosan spheres. Although the template-assisted approach and other protocols mentioned above offer promising ways to create polymer capsules that encapsulate a single metal nanoparticle, they involved rather complex synthesis procedures and rigorous control of reaction conditions.…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of a Single Metal Nanoparticle with Tunable Size in a Monodisperse Polymer Microcapsule

Kim

2009

Macromol. Rapid Commun.

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A versatile approach to fabricate monodisperse poly[styrene-co-(divinyl benzene)] (PS-co-DVB) microcapsules that contain a single gold nanoparticle (AuNP) has been demonstrated. Using the PS-co-DVB microcapsule as a microreactor, aqueous HAuCl(4) and NaBH(4) solutions are subsequently infiltrated. The size of the resulting AuNP inside of the PS-co-DVB microcapsules is easily tunable by controlling the repeated infiltration cycles of aqueous HAuCl(4) and NaBH(4) . PS-co-DVB microcapsules that contain a single silver and palladium nanoparticle are also obtained by following a similar protocol.

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“…As Cheng et al 14 UV-visible spectrophotometry ( max = 639 nm) showed that the encapsulation by adsorption was successful, with 88% efficiency under the conditions described in section 2.4. The Nile blue chlorideloaded ppy-chit hollow nanospheres were also characterized by ATR-IR and AFM.…”

Section: Model Drug Uptake and Characterisation Of Loaded Nanoparticlesmentioning

confidence: 86%

Evaluation of a Smart Polymer Nanosphere for Potential Use in Anticancer Drug Delivery

Vimalarasa

Foot

Calabrese

2014

Polymers and Polymer Composites

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SUMMARYPolypyrrole-chitosan (ppy-chit) hollow nanospheres have been synthesised using a simple route wherein dispersion polymerization of pyrrole was followed by treatment with aqueous ammonia, centrifugation and dialysis. Ppy-chit hollow nanospheres were characterized by techniques including transmission electron microscopy, atomic force microscopy, powder x-ray diffractometry and UV-visible spectrophotometry. The particle size and stability were assessed by using a Zetasizer. A model anticancer drug, Nile blue chloride, was loaded into the ppy-chit hollow nanospheres by adsorption, and the desorption profile showed that 88% of the dye was released at a typical physiological pH over a period of 5 hours. The combined molecular properties of chitosan and polypyrrole were beneficial to the drug delivery.

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Novel Method for the Preparation of Polymeric Hollow Nanospheres Containing Silver Cores with Different Sizes

Abstract: A novel photoreduction method is presented in this paper for the fabrication of polypyrrole-chitosan (PPy-CS) hollow nanospheres with movable Ag nanoparticles inside (Ag@PPy-CS). Ag nanoparticle is formed by ultraviolet irradiation in the interior of the PPy-CS hollow nanosphere.

Cited by 156 publications

References 29 publications

Hollow Micro‐/Nanostructures: Synthesis and Applications

Hollow Micro‐/Nanostructures: Synthesis and Applications

Encapsulation of a Single Metal Nanoparticle with Tunable Size in a Monodisperse Polymer Microcapsule

Evaluation of a Smart Polymer Nanosphere for Potential Use in Anticancer Drug Delivery

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