SrAl2O4 crystallite embedded inorganic medium with a super-long persistent luminescence, thermoluminescence and photostimulable luminescence for smart optical information storage

2021 ◽  
Author(s):  
Panpan Li ◽  
youjie hua ◽  
Renguang Ye ◽  
Muzhi Cai ◽  
Shiqing Xu ◽  
...  
Keyword(s):  
Information Storage ◽  
Optical Information ◽  
Persistent Luminescence ◽  
Inorganic Medium ◽  
Optical Information Storage

scholarly journals X-ray-charged bright persistent luminescence in NaYF4:Ln3+@NaYF4 nanoparticles for multidimensional optical information storage

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Yixi Zhuang ◽  
Dunrong Chen ◽  
Wenjing Chen ◽  
Wenxing Zhang ◽  
Xin Su ◽  
...  
Keyword(s):  
Biological Imaging ◽  
Information Storage ◽  
Lanthanide Ions ◽  
Optical Information ◽  
Persistent Luminescence ◽  
Effective Electron ◽  
X Ray ◽  
3 Dimensional ◽  
Nonradiative Transitions ◽  
Optical Information Storage

AbstractNaYF4:Ln3+, due to its outstanding upconversion characteristics, has become one of the most important luminescent nanomaterials in biological imaging, optical information storage, and anticounterfeiting applications. However, the large specific surface area of NaYF4:Ln3+ nanoparticles generally leads to serious nonradiative transitions, which may greatly hinder the discovery of new optical functionality with promising applications. In this paper, we report that monodispersed nanoscale NaYF4:Ln3+, unexpectedly, can also be an excellent persistent luminescent (PersL) material. The NaYF4:Ln3+ nanoparticles with surface-passivated core–shell structures exhibit intense X-ray-charged PersL and narrow-band emissions tunable from 480 to 1060 nm. A mechanism for PersL in NaYF4:Ln3+ is proposed by means of thermoluminescence measurements and host-referred binding energy (HRBE) scheme, which suggests that some lanthanide ions (such as Tb) may also act as effective electron traps to achieve intense PersL. The uniform and spherical NaYF4:Ln3+ nanoparticles are dispersible in solvents, thus enabling many applications that are not accessible for traditional PersL phosphors. A new 3-dimensional (2 dimensions of planar space and 1 dimension of wavelength) optical information-storage application is demonstrated by inkjet-printing multicolor PersL nanoparticles. The multicolor persistent luminescence, as an emerging and promising emissive mode in NaYF4:Ln3+, will provide great opportunities for nanomaterials to be applied to a wider range of fields.

NaMgF 3 :Tb 3+ @NaMgF 3 Nanoparticles Containing Deep Traps for Optical Information Storage

2021 ◽  
pp. 2100624
Author(s):  
Yikuang Wang ◽  
Dunrong Chen ◽  
Yixi Zhuang ◽  
Wenjing Chen ◽  
Hangyu Long ◽  
...  
Keyword(s):  
Information Storage ◽  
Optical Information ◽  
Deep Traps ◽  
Optical Information Storage

Ferrimagnetic Cobalt Ferrite Films Prepared by the Sol-Gel Process

1993 ◽  
Vol 313 ◽  
Author(s):  
Eva M. Wong ◽  
Haixing Zheng ◽  
John D. Mackenzie ◽  
T. Tsuchiya
Keyword(s):  
Remanent Magnetization ◽  
Cobalt Ferrite ◽  
Amorphous Film ◽  
Heat Treating ◽  
Fused Silica ◽  
Information Storage ◽  
Degree Of Crystallinity ◽  
Optical Information ◽  
Ferrite Films ◽  
Optical Information Storage

ABSTRACTFerrimagnetic oxide films have been shown to have potential for use as Magneto-optical information storage Materials. Cobalt ferrite films are particularly interesting for magneto optical information storage due to their high magneto optical rotation [1]. In this work, synthesized soluble cobalt (II) and iron (III) Methoxyethoxides were mixed in stoichiometric ratios for use as Co and Fe precursors in the preparation of CoFe2O4ferrimagnetic films. The decomposition of the precursors was characterized by thermogravimetric analysis.CoFe2O4 films were prepared by the dip coating technique using fused silica substrates. These films were then heat treated at temperatures ranging from 200°C to 600°C to study the transformation from an amorphous film to a crystalline film as determined by x-ray diffraction. The Magnetic hysteresis behavior of the films as a function of heat treating temperature and hence crystallinity was also studied. As a general trend, films having a greater degree of crystallinity exhibited larger values of saturation magnetization and remanent Magnetization. The amorphous film was found to exhibit the highest coercive field, but low values of saturation and remanent Magnetization. The effect of heat treating under the influence of a magnetic field of 1.88 kÖe was found to enhance crystallization only slightly and had very little effect on the magnetic properties of the film.

scholarly journals Side-chain Liquid Crystalline Polyesters for Optical Information Storage

1996 ◽  
Vol 7 (9) ◽  
pp. 768-776 ◽  
Author(s):  
P. S. Ramanujam ◽  
Christian Holme ◽  
Søren Hvilsted ◽  
Marianne Pedersen ◽  
Fulvio Andruzzi ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Information Storage ◽  
Side Chain ◽  
Optical Information ◽  
Optical Information Storage
Sign in / Sign up

Export Citation Format

Share Document