Observation of mechanically induced luminescence from microparticles

Abstract

We have invented a new device based on atomic force microscopy that measures the emission from a single microparticle by force direct application using the AFM probe, and successfully observed emission in the region of the elastic deformation, friction, and destructive deformation.

Progress of Research on Organic/Organometallic Mechanoluminescent Materials

“…同 时, 利用高速相机记录 ML 行为, 通常实验在室温暗室 中进行 [50] . 单个粒子式表征 ML 行为相对简单, 如图 2c 所示, 探针对样品进行力作用, 力致发光用光电倍增管 来接收, 收集到的信号计算机后台处理, 最后采集记录 ML 的行为 [51] . 根据材料的构成, 本文将从金属有机配 合物力致发光材料与纯有机力致发光材料两个方面予 以综述, 具体包括稀土金属(如 Eu, Dy, Tb 等)有机配合 物、过渡金属(如 Mn, Cu 等)有机配合物及纯有机小分 子和纯有机聚合物的设计与 ML 性质, 最后对该领域的 发展进行了展望.…”

Strong reddish-orange light emission from stress-activated Srn+1SnnO3n+1:Sm3+ (n = 1, 2, ∞) with perovskite-related structures

“…3 ML is a phenomenon where photons are emitted by mechanical stimuli; it is of particular interest for use in stress sensing devices which detect damage, fracture, and deformation in various structures. [4][5][6] Although some inorganic oxides, such as SrAl 2 O 4 :Eu 2þ , 7 CaAl 2 Si 2 O 8 :Eu 2þ , 8 SrMg 2 (PO 4 ) 2 :Eu 2þ , 9 display ML, perovskite oxides which exhibit intense ML are very attractive because they can be used as multi-functional materials. However, not all of the phosphors with perovskite structure have ML performance, for example, there is no ML in CaTiO 3 :Pr 3þ and BaTiO 3 :Pr 3þ .…”

Mechanoluminescence enhancement of the layered-structure compound Sr₃Sn₂O₇:Sm³⁺ by H₃BO₃ addition

“…14),15) Through preliminary study, we also found that H 3 BO 3 has a significant ML enhancement effect than other flux such as NH 4 Cl, AlF 3 . Here we investigated improvement of ML intensity of SSOS through H 3 BO 3 addition.…”

“…The excitation spectra showed only one broad peak at 265 nm, which was assigned as the absorption of the host material. The emission spectrum contained five characteristic peaks at 572, 582, 610, 625, and 665 nm, which were identified as the electron transitions in the Sm 3+ luminescence center from the excited state 4 G 5/2 to the ground state 6 H J (J = 5/2, 7/2, 9/2).…”