Fabrication of Core–Shell Nanostructures from Near-Infrared Electrochromic Amphiphilic Diblock Copolymers Containing Pendant Dinuclear Ruthenium Group through Assembly and Their Optical, Electrochemical, and Electroptical Properties

2011 ◽  
Vol 44 (13) ◽  
pp. 5146-5154 ◽  
Author(s):  
Weiran Lin ◽  
Yijun Zheng ◽  
Jie Zhang ◽  
Xinhua Wan
Keyword(s):  
Diblock Copolymers ◽  
Near Infrared ◽  
Core Shell ◽  
Shell Nanostructures ◽  
Dinuclear Ruthenium ◽  
Amphiphilic Diblock Copolymers

Self-Assemble Behavior of Amphiphilic Diblock Copolymer of Methoxy Poly (Ethylene Glycol)/Polyester

2011 ◽  
Vol 295-297 ◽  
pp. 11-15
Author(s):  
Hao Zhou ◽  
Qing Hong Liang ◽  
Xiang Ke Shi ◽  
Li Hua Lu ◽  
Li Qun Zhang ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Light Scattering ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Average Diameter ◽  
Core Shell ◽  
Amphiphilic Diblock Copolymer ◽  
Amphiphilic Diblock Copolymers ◽  
Methoxy Polyethylene Glycol ◽  
Solution Polycondensation

Amphiphilic diblock copolymers based on methoxy polyethylene glycol (MePEG), 1, 6-hexanediol and maleic anhydride with different molar composition were synthesized by solution polycondensation. Self-assemble behavior of amphiphilic diblock copolymer in different solvents by dialyzing technique was discussed. The micelle morphologhy was observed by TEM. It was found that well core-shell MePEG1900/Polyester 2162 copolymer nanoparticles can be formed by self-assemble in acetone solution. In addition, the size of nanospheres measured using dynamic light scattering exhibited a narrow monodisphere size distribution and an average diameter in the ranger of less than 200nm.

scholarly journals Core-Shell Structures of Upconversion Nanocrystals Coated with Silica for Near Infrared Light Enabled Optical Imaging of Cancer Cells

Micromachines ◽  
2018 ◽  
Vol 9 (8) ◽  
pp. 400 ◽  
Author(s):  
Kumbam Lingeshwar Reddy ◽  
Neeraj Prabhakar ◽  
Jessica Rosenholm ◽  
Venkata Krishnan
Keyword(s):  
Optical Imaging ◽  
Cancer Cells ◽  
Near Infrared ◽  
Shell Structures ◽  
Therapeutic Window ◽  
Luminescence Spectroscopy ◽  
Core Shell ◽  
Shell Nanostructures ◽  
Nir Light ◽  
Upconversion Nanocrystals

Optical imaging of cancer cells using near infrared (NIR) light is currently an active area of research, as this spectral region directly corresponds to the therapeutic window of biological tissues. Upconversion nanocrystals are photostable alternatives to conventional fluorophores. In our work, we have prepared upconversion nanocrystals of NaYF4:Yb/Er and encapsulated them in silica to form core-shell structures. The as-prepared core-shell nanostructures have been characterized for their structure, morphology, and optical properties using X-ray diffraction, transmission electron microscopy coupled with elemental mapping, and upconversion luminescence spectroscopy, respectively. The cytotoxicity examined using cell viability assay indicated a low level of toxicity of these core-shell nanostructures. Finally, these core-shell nanostructures have been utilized as photostable probes for NIR light enabled optical imaging of human breast cancer cells. This work paves the way for the development of advanced photostable, biocompatible, low-toxic core-shell nanostructures for potential optical imaging of biological cells and tissues.

scholarly journals [email protected] Core-Shell and Yolk-Shell Nanostructures: Selective Synthesis, Characterization, and Near-Infrared-Mediated Photocatalytic Reduction of Cr(VI)

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Wan-Ni Wang ◽  
Wang Dong ◽  
Chen-Xi Huang ◽  
Bo Liu ◽  
Sheng Cheng ◽  
...  
Keyword(s):  
Near Infrared ◽  
Separation Efficiency ◽  
Solution Process ◽  
Infrared Light ◽  
Core Shell ◽  
Sulfur Source ◽  
Shell Nanoparticles ◽  
Near Infrared Light ◽  
Shell Nanostructures ◽  
Photogenerated Electrons

Constructing near-infrared-light-mediated core-shell nanostructures incorporating upconversion nanoparticles (UCNPs) and semiconductors is of great importance for potential applications in photocatalysis, nano-biomedical engineering, solar cell, etc. In this work, we have demonstrated a two-step solution process to synthesize [email protected] core-shell nanoparticles (CSN). Firstly, a layer of AA-Zn(Cd)[OH]4− composites was coated on UCNPs to form UCNPs@AA-Zn(Cd)[OH]4− composites, which has been converted to [email protected] CSN via sulfidation reaction process using thioacetamide (TAA) as the sulfur source. Moreover, the [email protected] yolk-shell nanoparticles (YSN) have been obtained from the [email protected] CSN after calcination at 400°C, which show significantly photocatalytic activity for reduction of Cr(VI) under near-infrared light. All these can be attributed to the enhanced crystallization degree, resulting in enhanced energy transfer efficiency and separation efficiency of the photogenerated electrons and holes. An alternative strategy is provided in this study for fabrication of UCNP/semiconductor composites for various applications.

scholarly journals Radiofrequency and Near-Infrared Responsive Core–Shell Nanostructures Using Layersome Templates for Cancer Treatment

2019 ◽  
Vol 3 (1) ◽  
pp. 273-281 ◽  
Author(s):  
Animesh Pan ◽  
Md Golam Jakaria ◽  
Samantha A. Meenach ◽  
Geoffrey D. Bothun
Keyword(s):  
Cancer Treatment ◽  
Near Infrared ◽  
Core Shell ◽  
Shell Nanostructures

Half-Encapsulated Au Nanorods@CeO2 Core@Shell Nanostructures for Near-Infrared Plasmon-Enhanced Catalysis

2019 ◽  
Vol 2 (3) ◽  
pp. 1516-1524 ◽  
Author(s):  
Jing Pan ◽  
Lingling Zhang ◽  
Songtao Zhang ◽  
Zhan Shi ◽  
Xiao Wang ◽  
...  
Keyword(s):  
Near Infrared ◽  
Core Shell ◽  
Au Nanorods ◽  
Shell Nanostructures

Near-infrared driven photocatalytic performance of lanthanide-doped NaYF4@CdS core-shell nanostructures with enhanced upconversion properties

2017 ◽  
Vol 724 ◽  
pp. 481-491 ◽  
Author(s):  
Ramachandran Balaji ◽  
Suneel Kumar ◽  
Kumbam Lingeshwar Reddy ◽  
Vipul Sharma ◽  
Kaustava Bhattacharyya ◽  
...  
Keyword(s):  
Near Infrared ◽  
Photocatalytic Performance ◽  
Core Shell ◽  
Shell Nanostructures

scholarly journals Imparting multi-functionality to covalent organic framework nanoparticles by the dual-ligand assistant encapsulation strategy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Liang Chen ◽  
Wenxing Wang ◽  
Jia Tian ◽  
Fanxing Bu ◽  
Tiancong Zhao ◽  
...  
Keyword(s):  
Near Infrared ◽  
Core Shell ◽  
Tissue Penetration ◽  
Deep Tissue ◽  
Functional Nanoparticles ◽  
The Core ◽  
Shell Nanostructures ◽  
Potential Applications ◽  
Interfacial Growth ◽  
Promising Type

AbstractThe potential applications of covalent organic frameworks (COFs) can be further developed by encapsulating functional nanoparticles within the frameworks. However, the synthesis of monodispersed core@shell structured COF nanocomposites without agglomeration remains a significant challenge. Herein, we present a versatile dual-ligand assistant strategy for interfacial growth of COFs on the functional nanoparticles with abundant physicochemical properties. Regardless of the composition, geometry or surface properties of the core, the obtained core@shell structured nanocomposites with controllable shell-thickness are very uniform without agglomeration. The derived bowl-shape, yolk@shell, core@satellites@shell nanostructures can also be fabricated delicately. As a promising type of photosensitizer for photodynamic therapy (PDT), the porphyrin-based COFs were grown onto upconversion nanoparticles (UCNPs). With the assistance of the near-infrared (NIR) to visible optical property of UCNPs core and the intrinsic porosity of COF shell, the core@shell nanocomposites can be applied as a nanoplatform for NIR-activated PDT with deep tissue penetration and chemotherapeutic drug delivery.

Sign in / Sign up

Export Citation Format

Share Document