Hydrothermal synthesis of NaYF4:Yb3+,Tm3+ upconversion microparticles and their effects on polymerization for stereolithography

Yan, Miaoning; Liang, Guo; Cai, Peng; Huang, Yu-Ming; Zhang, Qingmao; Lue, Qitao

doi:10.1016/j.optmat.2020.110311

Cited by 10 publications

(3 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that many other photon upconversion excitation schemes exist . Photoinitiator molecules (green subpanel) are optically excited by ultraviolet (UV) photons emitted by excited upconversion NPs. − Alternatively, the energy from upconversion NPs can be transferred to photoinitiator molecules via a nonradiative energy transfer, e.g., Förster resonance energy transfer (not shown). (b) In two-step absorption, , a reluctant photoinitiator is optically excited via an excited singlet to an inactive triplet state.…”

Section: Reported (1 + 1)-photon Absorption Mechanismsmentioning

confidence: 99%

“…Typically, this absorption length cannot be made very much smaller than 10 μm. Within this length, the ultraviolet photon can excite an ordinary photoinitiator molecule by one-photon absorption (see Figure a and a), triggering the desired chemical reaction. − ,− Thereby, the absorption length limits the achievable minimum printed feature sizes. If the upconversion nanoparticles are coated with the photoinitiator molecules, this limitation does not apply.…”

Section: Upconversion Luminescencementioning

confidence: 99%

See 1 more Smart Citation

Challenges and Opportunities in 3D Laser Printing Based on (1 + 1)-Photon Absorption

et al. 2022

View full text Add to dashboard Cite

Most light-based 3D printing methods rely on optical or chemical nonlinearities to spatially confine the polymerization reaction. In 3D micro-and nanoprinting, this nonlinearity can be provided by two-photon absorption, which describes the simultaneous absorption of two photons. To achieve comparable absorption cross sections for two-photon as in onephoton absorption, short and intense laser pulses with intensities in the range of 1 TW/cm 2 are typically required. Herein, we review three emerging excitation processes that provide a quadratic nonlinearity versus intensity without relying on two-photon absorption: upconversion luminescence, two-step absorption, and triplet−triplet annihilation. We term these "(1 + 1)-photon absorption". Such processes allow for using continuous-wave lasers at much lower peak laser powers and at much lower cost than those typical for two-photon absorption. We review recent progress, describe current challenges, and outline future perspectives.

show abstract

Section: Reported (1 + 1)-photon Absorption Mechanismsmentioning

confidence: 99%

Section: Upconversion Luminescencementioning

confidence: 99%

Challenges and Opportunities in 3D Laser Printing Based on (1 + 1)-Photon Absorption

et al. 2022

View full text Add to dashboard Cite

show abstract

“…At present, various 3D printing technologies are widely used to prepare 3D-printed rock samples (Borrello et al 2018;Espalin et al 2014;Rajpurohit and Dave 2018), such as fused deposition modeling, stereolithography, and selective laser sintering. In particular, the application of light-sensitive resins, polylactic acid, and gypsum has opened up completely new avenues for studying the physical and mechanical properties of natural rocks with printed models (Ju et al 2021;Yan et al 2020). Numerous researchers have used 3D printing technology to prepare physical models that possess the same structure as natural rocks and investigated the differences between the physical and mechanical behaviors of these models and natural rocks (Gao et al 2020;Kong et al 2021Kong et al , 2018Mostaghimi et al 2017;Schlüter et al 2014;Zhou and Zhu 2017).…”

Section: Introductionmentioning

confidence: 99%

Size effects in the uniaxial compressive properties of 3D printed models of rocks: an experimental investigation

Han

et al. 2022

Int J Coal Sci Technol

View full text Add to dashboard Cite

Transparent physical models of real rocks fabricated using three-dimensional (3D) printing technology are used in photoelastic experiments to quantify the evolution of the internal stress and deformation fields of rocks. Therefore, they are rendered as an emerging powerful technique to quantitatively reveal the intrinsic mechanisms of rock failure. The mechanical behavior of natural rocks exhibits a significant size effect; however, limited research has been conducted on whether transparent physical models observe similar size effects. In this study, to make the transparent printed models accurately demonstrate the mechanical behavior of natural rocks and reveal the internal mechanism of the size effect in rock mechanical behavior, the size effect in 3D printed models of fractured and porous rocks under uniaxial compressive loading was investigated. Transparent cylindrical models with different sizes that contained different fractured and porous structures were printed using the fracture and porous characteristics extracted from natural coal and sandstone. The variation in uniaxial compressive strength and elastic modulus of fractured and porous models for increasing model sizes were obtained through uniaxial compression experiments. Finally, the influence of internal discontinuous structural features, such as fractures and pores, on the size effect pertaining to the mechanical behavior of the model was analyzed and elaborated by comparing it with the mechanical properties of the continuous homogeneous model without fractures and pores. The findings provided support and reference to analyze the size effect of rock mechanical behavior and the effect of the internal discontinuous structure using 3D printed transparent models.

show abstract

Application of Upconversion Nanoparticles in Photochemistry

Bastani,

Kandeloos,

Jalili

et al. 2023

Progress in Optical Science and Photonics

View full text Add to dashboard Cite

Hydrothermal synthesis of NaYF4:Yb3+,Tm3+ upconversion microparticles and their effects on polymerization for stereolithography

Cited by 10 publications

References 28 publications

Challenges and Opportunities in 3D Laser Printing Based on (1 + 1)-Photon Absorption

Challenges and Opportunities in 3D Laser Printing Based on (1 + 1)-Photon Absorption

Size effects in the uniaxial compressive properties of 3D printed models of rocks: an experimental investigation

Application of Upconversion Nanoparticles in Photochemistry

Contact Info

Product

Resources

About