Spin-Controlled Photoluminescence in Hybrid Nanoparticles Purple Membrane System | Zendy

Partha Roy | Zendy; Nirit KantorUriel | Zendy; Debabrata Mishra | Zendy; Sansa Dutta | Zendy; Noga Friedman | Zendy; Mordechai Sheves | Zendy; Ron Naaman | Zendy

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Spin-Controlled Photoluminescence in Hybrid Nanoparticles Purple Membrane System

Author(s) -

Partha Roy,

Nirit KantorUriel,

Debabrata Mishra,

Sansa Dutta,

Noga Friedman,

Mordechai Sheves,

Ron Naaman

Publication year - 2016

Publication title -

acs nano

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 5.554

H-Index - 382

eISSN - 1936-086X

pISSN - 1936-0851

DOI - 10.1021/acsnano.6b00333

Subject(s) - bacteriorhodopsin , photoluminescence , photochemistry , materials science , quenching (fluorescence) , covalent bond , substrate (aquarium) , retinal , membrane , chemistry , optoelectronics , fluorescence , optics , organic chemistry , biology , ecology , biochemistry , physics

Spin-dependent photoluminescence (PL) quenching of CdSe nanoparticles (NPs) has been explored in the hybrid system of CdSe NP purple membrane, wild-type bacteriorhodopsin (bR) thin film on a ferromagnetic (Ni-alloy) substrate. A significant change in the PL intensity from the CdSe NPs has been observed when spin-specific charge transfer occurs between the retinal and the magnetic substrate. This feature completely disappears in a bR apo membrane (wild-type bacteriorhodopsin in which the retinal protein covalent bond was cleaved), a bacteriorhodopsin mutant (D96N), and a bacteriorhodopsin bearing a locked retinal chromophore (isomerization of the crucial C13═C14 retinal double bond was prevented by inserting a ring spanning this bond). The extent of spin-dependent PL quenching of the CdSe NPs depends on the absorption of the retinal, embedded in wild-type bacteriorhodopsin. Our result suggests that spin-dependent charge transfer between the retinal and the substrate controls the PL intensity from the NPs.

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