Stimuli-Responsive Mechanoluminescence in Different Matrices

Ilatovskii, Daniil A.; Tyutkov, Nikita A; Vinogradov, Vladimir V.; Vinogradov, Alexandr V.

doi:10.1021/acsomega.8b02696

Cited by 13 publications

(9 citation statements)

References 24 publications

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“…For most ML phosphors, the ML intensity increases linearly with stress (magnitude of the pressure application) after a threshold 16,36 . The absolute magnitude of the intensity depends on the initial charging, stress amplitude and loading rate.…”

Section: Resultsmentioning

confidence: 99%

Adding memory to pressure-sensitive phosphors

et al. 2019

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Mechanoluminescence (ML) is the phenomenon describing the emission of light during mechanical action on a solid, leading to applications such as pressure sensing, damage detection and visualization of stress distributions. In most cases, this mechanical action releases energy that was previously stored in the crystal lattice of the phosphor by means of trapped charge carriers. A drawback is the need to record the ML emission during a pressure event. In this work, we provide a method for adding a memory function to these pressure-sensitive phosphors, allowing an optical readout of the location and intensity of a pressure event in excess of 72 h after the event. This is achieved in the BaSi2O2N2:Eu2+ phosphor, where a broad trap depth distribution essential for the process is present. By merging optically stimulated luminescence (OSL), thermoluminescence (TL) and ML measurements, the influence of light, heat and pressure on the trap depth distribution is carefully analysed. This analysis demonstrates that mechanical action can not only lead to direct light emission but also to a reshuffling of trap occupations. This memory effect not only is expected to lead to new pressure sensing applications but also offers an approach to study charge carrier transitions in energy storage phosphors.

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Section: Resultsmentioning

confidence: 99%

Adding memory to pressure-sensitive phosphors

et al. 2019

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“…As one of the few examples, Vinogradov et al systematically investigated the effect of boehmite (from alumina sol-gel) and PDMS matrices on ML composites with incorporated SrAl 2 O 4 :Eu 2+ , Dy 3+ . [235] It was found that the boehmite formed through polymerization could concentrate applied stress and increase the tension of each ML particle by 2-3 orders of magnitude compared to that in PDMS. Song and co-workers reported matrix modification of PDMS by adding SiO 2 nanoparticles to adjust the elastic modulus.…”

Section: Optimizing the Architecture Of ML Compositesmentioning

confidence: 99%

Mechanoluminescence Rebrightening the Prospects of Stress Sensing: A Review

2021

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Mechanoluminescence (ML) is the emission of light when a solid material is subjected to stress. [8][9] The intensity of the ML shows a strong correlation with the applied stress, making it suitable for stress sensing. ML stress sensing is based on a unique transduction principle from stress to photons, which paves the way for advanced stress sensing. In particular, ML-based sensing shows significant advantages of distributed detection and remote response to an applied stress by virtue of photon transmission through space. In addition, excellent stretchability, biocompatibility, and self-powering ability can be achieved within the stress-tophoton transduction units since electronic conduction is not needed. Importantly, ML-based sensing enables compensation of the shortcomings of conventional sensing technologies for emerging applications. Considering the many extraordinary performance characteristics, ML may hopefully rebrighten the prospects of stress sensing.Over the past few decades, ML materials and ML-based stress sensing have been extensively studied. Great efforts have been made to develop a large number of ML materials, deeply understand the ML mechanism, and boost the potential for stress sensing applications. Several review papers have been devoted to ML and its applications. [10][11][12][13][14][15][16][17] Bunzil and Wong summarized ML materials and stress sensors based on lanthanide compounds. [10] Xie and Li surveyed the progress in ML compounds with a focus on fractoluminescence. [11] An overview of inorganic ML compounds was presented by Feng and Smet, which particularly provides deep insight into the crystal structures and their relation to ML. [12] Additionally, Zhang et al. reviewed inorganic ML compounds, concentrating on their compositions, preparation, characterizations, mechanisms, and applications. [13] However, compared with materials and mechanisms, less attention has been paid to the technical performance of ML-based stress sensing and its relevance to applications. Obviously, reasonable analyses of the up-to-date performance are beneficial for properly assessing the potential for future applications.In this paper, we start with a brief overview of the desired performance characteristics of advanced stress sensing for several new applications (Section 2). The state-of-arts and challenges are highlighted. In Section 3, ML materials, ML-based sensors, and technical features will be discussed in an attempt to comprehensively evaluate ML-based sensing technology andThe emergence of new applications, such as in artificial intelligence, the internet of things, and biotechnology, has driven the evolution of stress sensing technology. For these emerging applications, stretchability, remoteness, stress distribution, a multimodal nature, and biocompatibility are important performance characteristics of stress sensors. Mechanoluminescence (ML)-based stress sensing has attracted widespread attention because of its characteristics of remoteness and having a distributed response to mechanical stimuli...

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“…This can be achieved by utilizing stiffer binders [214,215] or by enhancing the bonding at the binder-phosphor particle interfaces. [216,217] The ML intensity under a given stress profile is presumably linked to the kinetics of trapped electrons that are also responsible for persistent luminescence, thermoluminescence or optically stimulated luminescence. A linearly increasing stress (i.e., a ramp) or a sinusoidal stress is often applied to reveal the characteristics of the ML intensity.…”

Section: Mechanoluminescencementioning

confidence: 99%

“…This can be achieved by utilizing stiffer binders [ 214,215 ] or by enhancing the bonding at the binder‐phosphor particle interfaces. [ 216,217 ]…”

Section: Phenomena Related To Trapping and Energy Storagementioning

confidence: 99%

Persistent Luminescence in Strontium Aluminate: A Roadmap to a Brighter Future

Heggen

Joos

Feng

et al. 2022

Adv Funct Materials

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Glow-in-the-dark materials have been around for a long time. While formerly materials had to be mixed with radioactive elements to achieve a sufficiently long and bright afterglow, these have now been replaced by much safer alternatives. Notably strontium aluminate, SrAl 2 O 4 , doped with europium and dysprosium, has been discovered over two decades ago and since then the phosphor has transcended its popular use in watch dials, safety signage, or toys with more niche applications such as stress sensing, photocatalysis, medical imaging, or flicker-free light-emitting diodes. A lot of research efforts are focused on further improving the storage capacity of SrAl 2 O 4 :Eu 2+ ,Dy 3+ , including in nanosized particles, and on finding the underlying physical mechanism to fully explain the afterglow in this material and related compounds. Here an overview of the most important results from the research on SrAl 2 O 4 :Eu 2+ ,Dy 3+ is presented and different models and the underlying physics are discussed to explain the trapping mechanism at play in these materials.

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Stimuli-Responsive Mechanoluminescence in Different Matrices

Cited by 13 publications

References 24 publications

Adding memory to pressure-sensitive phosphors

Adding memory to pressure-sensitive phosphors

Mechanoluminescence Rebrightening the Prospects of Stress Sensing: A Review

Persistent Luminescence in Strontium Aluminate: A Roadmap to a Brighter Future

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