Detection of collapsed and ordered polymer structures by fluorescence resonance energy transfer in stiff homopolymers: Bimodality in the reaction efficiency distribution | Zendy

Goundla Srinivas | Zendy; Biman Bagchi | Zendy

Open Access

Detection of collapsed and ordered polymer structures by fluorescence resonance energy transfer in stiff homopolymers: Bimodality in the reaction efficiency distribution

Author(s) -

Goundla Srinivas,

Biman Bagchi

Publication year - 2002

Publication title -

the journal of chemical physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.071

H-Index - 357

eISSN - 1089-7690

pISSN - 0021-9606

DOI - 10.1063/1.1424318

Subject(s) - förster resonance energy transfer , bimodality , brownian dynamics , stiffness , materials science , chemical physics , polymer , resonance (particle physics) , distribution (mathematics) , chain (unit) , fluorescence , molecular physics , toroid , brownian motion , chemistry , physics , atomic physics , composite material , plasma , optics , mathematical analysis , mathematics , quantum mechanics , astronomy , galaxy

Distribution of fluorescence resonance energy transfer (FRET) efficiency between the two ends of a stiff homopolymer chain is calculated by Brownian dynamics simulations. We show that the various collapsed and/or ordered conformations (spherical, rod, and toroidal) of a stiff polymer chain can be effectively distinguished by using the fluorescence resonance energy transfer technique. In particular, FRET efficiency distribution is unimodal at low chain stiffness (where collapsed structure is disordered) but becomes bimodal with increasing chain stiffness, when ordered structures are formed. We have also presented a simple theoretical analysis for the evaluation of the structural parameters.

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