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1.  In-situ deposition of hydroxyapatite on graphene nanosheets 
Materials research bulletin  2013;48(2):175-179.
Graphene nanosheets were effectively functionalized by in-situ deposition of hydroxyaptite through a facile chemical precipitation method. Prior to grafting of hydroxyapatite, chemically modified graphene nanosheets were obtained by the reduction of graphene oxide in presence of ethylenediamine. The resulting hydroxyapatite functionalized graphene nanosheets were characterized by attenuated total reflection IR spectroscopy, X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, X-ray energy dispersive spectroscopy, Raman spectroscopy and thermogravimetric analysis. These characterization techniques revealed the successful grafting of hydroxyapatite over well exfoliated graphene nanosheets without destroying their structure.
PMCID: PMC4124456  PMID: 25110359
Graphene; Hydroxyapatite; Graphene oxide; Functionalization
2.  Gold-Based Magneto/Optical Nanostructures: Challenges for In Vivo Applications in Cancer Diagnostics and Therapy 
Materials research bulletin  2009;34(6):415-421.
Nanoparticles with gold shell and iron core have unique optical and magnetic properties which can be utilized for simultaneous detection and treatment strategies. Several nanoparticles have been synthesized and shown to mediate a variety of potential applications in biomedicine, including cancer molecular optical and magnetic resonance imaging, controlled drug delivery, and photothermal ablation therapy. However, to be effective, these nanoparticles must be delivered efficiently into their targets. In this review, we will provide an updated summary of the gold-shelled magnetic nanoparticles that have been synthesized, methods for characterization, and their potential for cancer diagnosis and treatment. We will also discuss the biological barriers that need to be overcome for the effective delivery of these nanoparticles. The desired nanoparticle characteristics needed to evade these biological barriers were also explained. Hopefully, this review will help researchers in designing nanoparticles by carefully choosing the optimum size, shape, surface charge, and surface coating.
PMCID: PMC2891272  PMID: 20582234
3.  Photocatalytic Degradation of Reactive Brilliant Blue X-BR in Aqueous Solution Using Quantum-sized ZnO 
Materials research bulletin  2008;43(8-9):2172-2178.
Quantum-sized ZnO was prepared using sol–gel method with Zinc acetate dehydrate (Zn(CH3COO)2·2H2O) and lithium hydroxide monohydrate(LiOH·H2O) as raw material. The ZnO particles annealed at different temperature were characterized by means of X-ray diffraction (XRD), Infrared absorption spectroscopy (IR) and UV-Vis spectroscopy. The degradation rate of reactive brilliant blue X-BR in aqueous solution was used to evaluate the photocatalytic performance of the quantum-sized ZnO. The experimental results indicated that the photocatalytic property of the ZnO was excellent. The photocatalytic efficiency of quantum-sized ZnO was significantly influenced by the calcining heat. When calcined at 300oC, its size is 6.78 nm and the photocatalytic performance is the best. The degradation rate of reactive brilliant blue X-BR could exceed 90% in 15 min at 35oC, when the concentration of the quantum-sized ZnO was 0.35 mg/L.
PMCID: PMC2597871  PMID: 19657381
sol-gel; zinc oxide; reactive brilliant blue X-BR; photocatalytic degradation

Results 1-3 (3)