Progress in triboluminescence-based smart optical sensor system

Brilliant Photoluminescence and Triboluminescence from Ternary Complexes of DyIII and TbIII with 3-Phenyl-4-propanoyl-5-isoxazolonate and a Bidentate Phosphine Oxide Coligand

“…Because their thermal stability is large, this could be exploited in applications for damage detection of civil, aerospace, and military structures or biomedical materials as well as for impact sensors. 6,48,49 ■ ASSOCIATED CONTENT * S Supporting Information TGA for complexes 1−3; perspective view of 3; table of crystal data, collection, and structure refinement parameters; absorption spectra of ligands and complexes in solution and solid state; solid state emission spectra of 1−3 at 298 K (direct excitation at the f−f transitions); combined excitation spectra of 1 and 2; room temperature and 77 K emission spectra of [Gd(PPI) 3 …”

Lifetime-based measurement of stress using mechanoluminescence of SrAl_2O_4:Eu^2+

“…Xu et al [2,3] developed a bright nondestructive ML phosphor, SrAl 2 O 4 :Eu (SAOE), which enabled direct observation of the stress distribution using an intensified CCD sensor. The ML was emitted due to the transition of Eu ions between 4f 7 and 4f 6 5d 1 [4], and the ML intensity was three orders of magnitude higher than that for quartz [1]. This significant improvement in ML intensity was attributed to the low symmetry of the monoclinic structure and the nanosize particles in the α-SrAl 2 O 4 powder.…”

“…Various inorganic and organic materials can emit mechanoluminescence (ML) due to factors, such as stress, strain, friction, and fracture [1]. Some alkali halide and quartz crystals have already been extensively studied in this regard.…”

Mechanoluminescence of (ZnS)1−x(MnTe)x nanophosphors excited by impact of a load

“…(ii) earthquake lights [14,15], moonquake lights [16], (iii) dynamics and mechanics of fracture [17][18][19], (iv) design of damage sensors [20,21], (v) design of fracture sensors [22][23][24], (vi) fuse-system for army warhead [25,26], (vii) design of safety management monitoring system [27][28][29][30], identifying the suitable design of milling machines [31][32][33] and the understanding the process of grinding in milling machines [34]. Such potentials of fracto ML require deep understanding of the correlation between fracto ML and fracture.…”