%0 Journal Article
%T Optical Waveguiding Organic Nanorods Coated with Reversibly Switchable Fe(II) Spin Transition Nanoparticles
%A Supratim Basak
%A Ajay Kumar Botcha
%A M. Thameem Ansari
%A Rajadurai Chandrasekar
%J Indian Journal of Materials Science
%D 2013
%R 10.1155/2013/136178
%X A dual functional nanohybrid object combining photonic and magnetic properties was successfully prepared through a ¡°bottom-up¡± self-assembly approach. In this method, spin transition Fe(II) coordination nanoparticles and optical wave guiding organic nanorods were generated in situ and successfully integrated together in a single pot through self-assembly. The Fe(II) nanoparticles coated on organic nanorods (nanohybrids) display temperature dependent reversible spin transition (Paramagnetic; diamagnetic; ) behavior. The nano-hybrids show efficient optical wave guiding behavior, which demonstrates the future possibility to perform light induced excited spin state trapping (LIESST) experiments on a single spin transition nanoparticle level. These photonic and magnetic ¡°nanohybrids¡± offer promising option to externally manipulate spin state of the spin transition nanoparticles using temperature as well as remote laser light. 1. Introduction Bottom-up nanofabrication of self-assembled multifunctional nanoobjects and study of their uncharted physical properties at the nanoscale level are an active and sophisticated research area of nanoscience and technology [1¨C13]. Particularly programming the in situ growth of self-assembled organic and inorganic nanostructures from different molecular components and also their integration to form hybrid nanoscale objects in the same pot is a less explored area. A successful groundwork in this discipline might lead to new advanced functional hybrid nanomaterials capable of performing a sensing, electronic, photonic, and mechanical function [1¨C13]. For example integration of magnetically bistable inorganic nanoparticles (NPs) and optical wave guiding organic nanostructures could facilitate remote manipulation of the light sensitive spin states of individual NPs through guided laser light. Recently, we have reported for the first time on the passive wave guiding behavior of organic tubes and also demonstrated the remote electronic excitation of a mesotetratolylporphyrin nanosheet using a 20£¿ m long optical wave guiding organic tube [14¨C16]. Hence we intended to study the propensity of the 1D organic solids coated with spin transition NPs [17¨C37] (ST-NPs) to guide source laser light under laser confocal microscope setup. It was anticipated that the dielectric difference between the 1D nano-hybrid solid and the surrounding medium would guide the optical wave along the growth axis of the waveguide. Among NPs, Fe(II) ST-NPs are of interest due to their switchable bistable magnetic spin states between paramagnetic high-spin state
%U http://www.hindawi.com/journals/ijms/2013/136178/