Blocking Temperature of the System Core-Shell Nanoparticles

Optical Limiting Characteristics of Core-Shell Nanoparticles

TiO2 nanoparticles were synthesized by hydrothermal method at 180 ̊C from TiOSO4 aqueous solution with1m/l concentration. The obtained products were coated with silica by means of a seeded polymerization technique for a coating time of 1440 minutes to obtain well defined TiO2@SiO2 core-shell structure. The uncoated and coated nanoparticles were characterized by using X-Ray diffraction technique ...

control of the optical properties of nanoparticles by laser fields

در این پایان نامه، درهمتنیدگی بین یک سیستم نقطه کوانتومی دوگانه(مولکول نقطه کوانتومی) و میدان مورد مطالعه قرار گرفته است. از آنتروپی ون نیومن به عنوان ابزاری برای بررسی درهمتنیدگی بین اتم و میدان استفاده شده و تاثیر پارامترهای مختلف، نظیر تونل زنی(که توسط تغییر ولتاژ ایجاد می شود)، شدت میدان و نسبت دو گسیل خودبخودی بر رفتار درجه درهمتنیدگی سیستم بررسی شده اشت.با تغییر هر یک از این پارامترها، در...

The effect of temperature on optical absorption cross section of bimetallic core-shell nano particles

In this paper, the temperature dependence on optical absorption cross section of the core shell bimetallic nanoparticles (NPs) is investigated in quasi static approximation. Temperature dependence of the plasmon resonance is important issue because of recent applications of NPs of noble metal for heat treating of cancer and the computer chips. The effect of temperature on surface plasmon resona...

Shell pressure on the core of MnO/Mn3O4 core/shell nanoparticles

A myriad of core/shell nanoparticles (NPs) have been developed and studied in the last decades aiming at the increase of functionality, stability, dispersibility, biocompatibility, and specific targeting, for instance.1 Shells can also interact synergetically with the core by changing lattice parameters, resulting in strain-engineered materials with tuned, improved, and new properties.2,3 This ...

Core/shell magnetism in NiO nanoparticles