Grayscale image recording on Ge2Sb2Te5 thin films through laser-induced structural evolution

Wei, Tao; Wei, Jingsong; Zhang, Kui; Zhao, Hongxia; Zhang, Long

doi:10.1038/srep42712

Cited by 29 publications

(23 citation statements)

References 27 publications

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“…They are important because they provide the potential for economical processing employing the smallest quantity of raw materials while achieving the application requirements. [ 20–23 ] They have been utilized in various applications, such as antireflective coatings, [ 24 ] air/water filters, [ 25 ] drug delivery, [ 26 ] light‐emitting diodes, [ 27 ] electronic recording devices, [ 28 ] solar cells [ 29 ] and food packaging. [ 30–33 ] Nanocomposite films immobilized with nanomaterials have received great consideration due to their desirable properties, such as optical, [ 34 ] catalytic, [ 35 ] sensory, [ 36,37 ] water‐repellent, [ 38,39 ] antimicrobial, [ 40 ] UV protection, [ 41 ] and electrical conductivity [ 42 ] that make them suitable for various advanced technical applications.…”

Section: Introductionmentioning

confidence: 99%

Facile development of photochromic cellulose acetate transparent nanocomposite film immobilized with lanthanide‐doped pigment: ultraviolet blocking, superhydrophobic, and antimicrobial activity

et al. 2020

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Smart photochromic and fluorescent products can respond to an external stimulus by changing their colour and emission spectra with light. Here, we developed a simple formulation of an organic–inorganic nanocomposite photoluminescent cellulose acetate (CA) film based on immobilization of a lanthanide‐doped pigment. Strontium aluminium oxide pigment doped with Eu2+ and Dy3+ (SAOED) exhibits an optimal excitation wavelength at 365 nm. For better fabrication of the multifunctional colourless pigment–cellulose acetate composites (CA–SAOED), the lanthanide‐doped colourant must be well‐dispersed physically without agglomeration. The fabricated photoluminescence cellulose film exhibited an excitation peak at 436 nm and two fluorescence peaks at 494 and 524 nm. The findings revealed that the originated nanocomposite films demonstrated improved superhydrophobic activity, high ultraviolet light protection and enhanced antibacterial activity without adversely influencing its native physico‐mechanical characteristics. The films demonstrated fast and reversible photochromic responsiveness without fatigue during ultraviolet light irradiation.

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Section: Introductionmentioning

confidence: 99%

Facile development of photochromic cellulose acetate transparent nanocomposite film immobilized with lanthanide‐doped pigment: ultraviolet blocking, superhydrophobic, and antimicrobial activity

et al. 2020

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“…In these chalcogenide phase change materials, Ge-Sb-Te family 24,25 , such as Ge 2 Sb 2 Te 5 26 , Ge 1 Sb 2 Te 4 27 , and Ge 1 Sb 4 Te 7 28 , are the most popular chalcogenide phase change materials in actual applications. The typical Ge 2 Sb 2 Te 5 thin films have multi-functions 29 , such as super-resolution mask 30 , phase-selective florescence 31 and image lithography 32 .…”

Section: Introductionmentioning

confidence: 99%

Temperature dependent thermal conductivity and transition mechanism in amorphous and crystalline Sb2Te3 thin films

Wei

Sun

et al. 2017

Sci Rep

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Sb2Te3 thin films are widely used in high density optical and electronic storage, high-resolution greyscale image recording, and laser thermal lithography. Thermal conductivity and its temperature dependence are critical factors that affect the application performance of thin films. This work aims to evaluate the temperature dependence of thermal conductivity of crystalline and amorphous Sb2Te3 thin films experimentally and theoretically, and explores into the corresponding mechanism of heat transport. For crystalline Sb2Te3 thin films, the thermal conductivity was found to be 0.35 ± 0.035 W m−1 K−1 and showed weak temperature dependence. The thermal conductivity of amorphous Sb2Te3 thin films at temperatures below ~450 K is about 0.23 ± 0.023 W m−1K−1, mainly arising from the lattice as the electronic contribution is negligible; at temperatures above 450 K, the thermal conductivity experiences an abrupt increase owing to the structural change from amorphous to crystalline state. The work can provide an important guide and reference to the real applications of Sb2Te3 thin films.

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“…10,16,18 This is important as GST can be switched ultrafastly between the metallic-crystalline and the insulatingamorphous phase by laser annealing. 14,15,19,20 Hence, a spectroscopic study combining data from single crystalline, amorphized, and re-crystallized GST is required to obtain electronic structure information for an understanding of the MIT switching in GST.…”

mentioning

confidence: 99%

Origin of electronic localization in metal-insulator transition of phase change materials

Sarkar

Perumal

Kulkarni

et al. 2018

Applied Physics Letters

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Tellurium based phase change materials are unique 3D-solids proposed to undergo Anderson type metal-insulator transition. However, the origin of this transition is not unambiguously understood. Here, we report combined high energy resolution photoemission spectroscopy and high k-resolution X-ray diffraction measurements on a reversibly phase switched Ge 2 Sb 2 Te 5 film. The results resolve the ambiguity between previous spectroscopic data and the proposed theoretical model for the origin of Anderson localization in these materials. Furthermore, by switching between the metallic state to insulating and back to metallic, we probe the electronic structure evolution in the phase change material.

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Grayscale image recording on Ge2Sb2Te5 thin films through laser-induced structural evolution

Cited by 29 publications

References 27 publications

Facile development of photochromic cellulose acetate transparent nanocomposite film immobilized with lanthanide‐doped pigment: ultraviolet blocking, superhydrophobic, and antimicrobial activity

Facile development of photochromic cellulose acetate transparent nanocomposite film immobilized with lanthanide‐doped pigment: ultraviolet blocking, superhydrophobic, and antimicrobial activity

Temperature dependent thermal conductivity and transition mechanism in amorphous and crystalline Sb2Te3 thin films

Origin of electronic localization in metal-insulator transition of phase change materials

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