Correlation of triboluminescence and contact stresses in ZnS:Mn/polymeric matrix composite

Leelachao, Sirichai; Muraishi, Shinji; Sannomiya, Takumi; Shi, Ji; Nakamura, Yoshio

doi:10.1016/j.jlumin.2015.10.009

Cited by 14 publications

(12 citation statements)

References 23 publications

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“…The second phase of nonlinearity occurs at much higher energy of deformation/strain, and originates from a saturation effect, which arises from the low number of trapped carriers remaining in material. In summary, many trap-controlled ML materials exhibit nonlinear ML phenomena at low and high strain energies [7,16,20,83,89,93,158,194,[238][239][240][241][242].…”

Section: Nonlinearitymentioning

confidence: 99%

Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

261

196

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Mechanoluminescence (ML) is generated during exposures of certain materials to mechanical stimuli. Many solid materials produce ML during their fracturing, however, the irreversibility of fracto-induced ML limits the practical applications of these materials. In 1999, Chao-Nan Xu discovered an intense and reproducible ML from trap-controlled materials, including ZnS:Mn 2+ and SrAl 2 O 4 :Eu 2+ , and introduced the principles and applications of hybrid inorganic/organic mechanoluminescent (ML) composites, and related sensors to visualize stress/strain in target structures. This discovery has triggered intense research interest in trap-controlled ML materials and composites over the past 2 decades. Notable achievements of this research include the development of trap-controlled materials that exhibit bright ML emission from the ultraviolet to the near infra-red, and multiscale mechano-optical sensitivities. This research has also increased our understanding of the mechanisms of ML phenomena, enabling the rational design of trap-controlled ML materials. Practical applications of ML are also being driven by the discovery that ML composites can serve as "mechano-optical sensitive skin" for structural health diagnosis, stress sensors for biomechanics, and mechanically-activated light sources. This review focuses on the design, synthesis, characterization, optimization and application of trap-controlled ML materials, and concludes with discussions on future directions of ML research and specific challenges to improve ML materials for real-world applications.

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Section: Nonlinearitymentioning

confidence: 99%

Trap-controlled mechanoluminescent materials

Zhang

Wang

Marriott

et al. 2019

Progress in Materials Science

261

196

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show abstract

“…Stability and stress-sensing elements are highly desirable in a variety of applications in materials engineering. − In particular, monitoring the direction of failure in materials can provide information about the mechanism of failure. The key challenge is to develop and control reproducible signals from the sensing elements upon mechanical action.…”

Section: Introductionmentioning

confidence: 99%

“…Recent advances in materials science have produced advances in such mechano-optical sensor materials. One mechanism studied is triboluminescence (TL), where light emission is produced from materials under mechanical impact. − The integration of TL crystalline particles into a substrate offers significant potential in the development of impact-sensing technology. − In recent years, various TL materials such as ZnS/Mn, Y 2 O 3 and Y 2 O 3 /Eu, EuD 4 TEA, , MgD 4 TEA, ZnO microsized particles, CaAl 2 O 4 and MgAl 2 O 4 , SrAl 2 O 4 , Ln/SrAl 2 O 4 , BaAl 2 SiO 8 , 3,6-dibromocarbazole, N -isopropylcarbazole, ester derivatives of 9-anthracenecarboxylic acid, and N -phenyl imide compounds were introduced in the literature. Among these TL materials, organometallic compounds are particularly attractive, allowing the development of noncentrosymmetric structures with accompanying intense triboluminescence, a long-lived quantum yield, and good chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Triboluminescent Electrospun Mats with Blue-Green Emission under Mechanical Force

İncel¹,

Varlıklı²,

McMillen

et al. 2017

J. Phys. Chem. C

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Fibrous mechanosensing elements can provide information about the direction of crack propagation and the mechanism of material failure when they are homogeneously dispersed into the bulk volume of materials. A fabrication strategy of fibrous systems showing triboluminescent (TL) responses is in high demand for such applications. In this work, micrometer-sized Cu(NCS)(py) 2 (PPh 3 ) crystals were synthesized, and polymeric fibrous mats containing the TL crystals were obtained via electrospinning as a stress probe for the determination of mechanical impact. Four different polymeric systems have been employed (PMMA, PS, PU, and PVDF), and the mechano-optical sensing performance of electrospun mats of the polymer-crystal composites was measured. Photophysical properties (quantum yield, band gap, and broadness of the emission) of the TL crystal/electrospun mat composites were also studied. TL and PL emission maxima of the PU-based composite mat show identical behavior due to the chemical affinity between the two structures and the smallest fiber diameter. Moreover, the PU fiber mats exhibit long-lived bluish-green emission persisting over a large number of drops.

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“…The study also showed that the TL emission intensity increased with the applied loads. On the other hand, Leelachao et al (2016) showed that the friction-induced TL emission of ZnS:Mn dispersed in polymer matrix is proportional to applied normal force. Moreover, such linear relationship between TL intensity and applied load has been reported in numerous studies relating to friction-induced triboluminescence (Xu et al, 1999a; Zhang et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, such linear relationship between TL intensity and applied load has been reported in numerous studies relating to friction-induced triboluminescence (Xu et al, 1999a; Zhang et al, 2013). In addition, an empirical relationship was proposed by Leelachao et al (2016) where the TL emission intensity was expressed in the form of an exponential function of a square of the applied stress. Several other studies on the relationship of the TL emission and stress can be found in other works (Chandra and Chandra, 2011; Jia et al, 2006; Someya et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Development of friction-induced triboluminescent sensor for load monitoring

Shohag

Jiang

Hammel

et al. 2017

Journal of Intelligent Material Systems and Structures

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Real-time load monitoring of critical civil and mechanical structures especially dynamic structures such as wind turbine blades is imperative for longer service life. This article proposed a novel sensor system based on the proprietary in situ triboluminescent optical fiber (ITOF) sensor for dynamic load monitoring. The new ITOF sensor patch consists of an ITOF sensor network with micro-exciters integrated within a polymer matrix. The sensor patch was subjected to repeated flexural loading and produced triboluminescent emissions due to the friction between micro-exciters and ITOF sensors corresponding to each loading cycle. The friction-induced triboluminescent intensity directly depends on the loading rate, the coefficient of friction, and the applied load on patch. In general, the triboluminescent intensity increases exponentially with an increase in load. Additionally, the sensor patches comprising the coarser micro-exciters exhibited better results. Similarly, better results were achieved at higher loading rates although a threshold loading rate is required to excite the triboluminescent crystals for this sample configuration. The proposed new sensor has the ability to monitor dynamic continuous applied loads.

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Correlation of triboluminescence and contact stresses in ZnS:Mn/polymeric matrix composite

Cited by 14 publications

References 23 publications

Trap-controlled mechanoluminescent materials

Trap-controlled mechanoluminescent materials

Triboluminescent Electrospun Mats with Blue-Green Emission under Mechanical Force

Development of friction-induced triboluminescent sensor for load monitoring

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