tailieunhanh - Báo cáo hóa học: " Core shell hybrids based on noble metal nanoparticles and conjugated polymers: synthesis and characterization"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Core shell hybrids based on noble metal nanoparticles and conjugated polymers: synthesis and characterization | Fratoddi et al. Nanoscale Research Letters 2011 6 98 http content 6 1 98 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Core shell hybrids based on noble metal nanoparticles and conjugated polymers synthesis and characterization 1 1 2 2 3 1 Ilaria Fratoddi lole Venditti Chiara Battocchio Giovanni Polzonetti Cesare Cametti Maria Vittoria Russo Abstract Noble metal nanoparticles of different sizes and shapes combined with conjugated functional polymers give rise to advanced core shell hybrids with interesting physical characteristics and potential applications in sensors or cancer therapy. In this paper a versatile and facile synthesis of core shell systems based on noble metal nanoparticles AuNPs AgNPs PtNPs coated by copolymers belonging to the class of substituted polyacetylenes has been developed. The polymeric shells containing functionalities such as phenyl ammonium or thiol pending groups have been chosen in order to tune hydrophilic and hydrophobic properties and solubility of the target core shell hybrids. The Au Ag or Pt nanoparticles coated by poly dimethylpropargylamonium chloride or poly phenylacetylene-co-allylmercaptan . The chemical structure of polymeric shell size and size distribution and optical properties of hybrids have been assessed. The mean diameter of the metal core has been measured about 10-30 nm with polymeric shell of about 2 nm. Introduction The field of nanoscience and nanotechnology has found a dramatic attention in recent years and applicative perspectives of nanomaterials are widely studied 1 . One of the main goals in nanoscience is the understanding of materials behaviour when the size becomes close to atomic dimensions. Increased attention has been recently paid to metallic nanoparticles and in particular to noble metal nanoparticles Au Ag Pt that can be used in several fields biomedicine diagnostics 2 drug delivery systems 3 sensors 4 5 catalysis 6 and optics 7 8 . Optical .

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