Free Volume Related Fluorescence Properties of Electron Irradiated Chalcone Doped PMMA Films

Journal Article · Fri Jul 15 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3605803· OSTI ID:21608143

Ravindrachary, Ismayil V; Bhajantri, R F; Harisha, A ^[1]; Praveena, S D ^[2]

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1. Department of Physics, Mangalore University, Mangalagangotri - 574 199 (India)
2. Department of Physics, K.V.G College of Engineering, Kurunjibhag, Sullia, Karnataka - 574 327 (India)

Effect of electron irradiation on free volume related fluorescence properties of chalcone doped Poly(methyl methacrylate)(PMMA) composite films have been studied using Positron Annihilation and Fluorescence spectroscopic techniques. In this polymer composite, enhancement of fluorescence at lower doses and reduction at higher doses has been observed under electron irradiation. From Positron annihilation studies suggests that at lower doses of irradiation induced crosslinking which affect the free volume properties and inturn hinders the chalcone molecular rotation. At higher doses chain scission process affect matrix relaxation. Under the restricted condition the chromophore molecules likely to emit enhanced fluorescence and its mobility is directly related to the free volume around it.

• OSTI ID: 21608143
• Journal Information: AIP Conference Proceedings, Vol. 1349, Issue 1; Conference: 55. DAE solid state physics symposium 2010, Manipal (India), 26-30 Dec 2010; Other Information: DOI: 10.1063/1.3605803; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANNIHILATION
COMPOSITE MATERIALS
CROSS-LINKING
DOPED MATERIALS
DOSES
ELECTRON BEAMS
EMISSION SPECTROSCOPY
EXCITED STATES
FILMS
FLUORESCENCE
IRRADIATION
METHACRYLIC ACID ESTERS
MOBILITY
PHYSICAL RADIATION EFFECTS
PMMA
POSITRONS
RELAXATION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BEAMS
CARBOXYLIC ACID ESTERS
CHEMICAL REACTIONS
ELEMENTARY PARTICLES
EMISSION
ENERGY LEVELS
ESTERS
FERMIONS
INTERACTIONS
LEPTON BEAMS
LEPTONS
LUMINESCENCE
MATERIALS
MATTER
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE BEAMS
PARTICLE INTERACTIONS
PHOTON EMISSION
POLYACRYLATES
POLYMERIZATION
POLYMERS
POLYVINYLS
RADIATION EFFECTS
SPECTROSCOPY