Dislocation models of mechanoluminescence in γ- and X-irradiated alkali halides crystals

Chandra, B. P.; Elyas, M.; Majumdar, B.

doi:10.1016/0038-1098(82)90654-8

Cited by 29 publications

(15 citation statements)

References 15 publications

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“…An independent investigation, [12] suggests that the plot of iV,P versus lg(np ~ 1) is R straight line with a negative slope, which supports equation (6).…”

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confidence: 56%

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Pressure and Temperature Dependence of the Mechanoluminescence of γ-Irradiated Alkali Halide Crystals

Chandra

Elyas

Majumdar

1983

Phys. Stat. Sol. (a)

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The intensity of mechanoluminescence (ML) produced during application and release of uniaxial pressure, in γ‐irradiated KBr, KCl, KI, LiF, and NaCl crystals decreases with the number of applications and releases of the pressure. The ML intensity of γ‐irradiated KBr, KCl, LiF, and NaCl crystals increases with the temperature, however, the ML intensity of γ‐irradiated KI crystals decreases with the temperature. The ratio of the ML intensity during the relase of the pressure to the ML intensity during the corresponding number of applications of the pressure, decreases with the temperature of the crystals. Assuming that the movement of dislocations is responsible for the ML excitation, the pressure and temperature dependence of the ML is discussed. The activation energy related to the increase in the number of dislocations with the temperature is estimated from the ML measurement and it is found to be 0.24, 0.25, 0.24, and 0.32 eV for γ‐irradiated KBr, KCl, LiF, and NaCl crystals respectively.

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“…An independent investigation, [12] suggests that the plot of iV,P versus lg(np ~ 1) is R straight line with a negative slope, which supports equation (6).…”

supporting

confidence: 56%

“…The value of /? estimated from the plot of Ig IR versus (np -1) is nearly equal to the value of the slope 01 estimated from the plot of lg NR versus ( n p -1) (for the same stress) [12]. This fact indicates that is much less than a.…”

mentioning

confidence: 57%

Pressure and Temperature Dependence of the Mechanoluminescence of γ-Irradiated Alkali Halide Crystals

Chandra

Elyas

Majumdar

1983

Phys. Stat. Sol. (a)

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“…Triboluminescence is mechanically induced fluorescence and is also known as fracto- [7] or mechanoluminescence. [8] It offers, e.g. the possibility to detect strain and/or microcracks locally in polymeric materials.…”

Section: Full Papermentioning

confidence: 99%

“…Triboluminescent inorganic particles may act as functional fillers in polymers. Triboluminescence is mechanically induced fluorescence and is also known as fracto‐7 or mechanoluminescence 8. It offers, e.g.…”

Section: Introductionmentioning

confidence: 99%

Functional Diblock Copolymers for the Integration of Triboluminescent Materials into Polymer Matrices

Meuer

Zentel

2008

Macro Chemistry & Physics

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This work describes the synthesis and use of new diblock copolymers to integrate functional inorganic particles into a polymer matrix. These diblock copolymers were synthesized by nitroxide‐mediated polymerization (NMP) from styrene and two styrene‐like monomers with protected functional groups for the later connection to the functional inorganic material. It was possible to keep the polydispersity of the block copolymers around or below 1.2 and to preset the length of the functional block to about 20 monomers or 10 mol‐% of monomers. The groups for the surface functionalization (amino groups or chelating ligands) were obtained in their free form by polymer analogous reactions. As an example of functional inorganic materials, two highly triboluminescent materials were synthesized and investigated: an europium complex that is sensitive to fracture only and a manganese‐doped zinc sulfide that is also sensitive to reversible deformations. The interaction of the functional block copolymers with these triboluminescent crystals could be proved by (i) selective adsorption on surfaces coated with the block copolymer, (ii) by copolymer‐mediated transfer of the crystals from water to a chloroform phase and (iii) by the homogenous embedding of the crystals in a polystyrene (PS) matrix.

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“…Triboluminescence also known as fracto- [2], piezo- [3], or mechano-luminescence [4], is the emission of light by solid materials when they are stressed or fractured [5,6]. It has been estimated that about 50% of all crystal compounds exhibit a range of TL [7].…”

Section: Introductionmentioning

confidence: 99%

Progress in triboluminescence-based smart optical sensor system

Olawale

Dickens

Sullivan

et al. 2011

Journal of Luminescence

149

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Dislocation models of mechanoluminescence in γ- and X-irradiated alkali halides crystals

Cited by 29 publications

References 15 publications

Pressure and Temperature Dependence of the Mechanoluminescence of γ-Irradiated Alkali Halide Crystals

Pressure and Temperature Dependence of the Mechanoluminescence of γ-Irradiated Alkali Halide Crystals

Functional Diblock Copolymers for the Integration of Triboluminescent Materials into Polymer Matrices

Progress in triboluminescence-based smart optical sensor system

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