Optically active sol-gel microspheres for flat-panel color displays

Author(s):  
Edward J. A. Pope
1994 ◽  
Vol 345 ◽  
Author(s):  
Edward J. A. Pope

AbstractBy the end of 1994, flat-panel displays for lap-top computers and televisions will exceed $4.0 billion in total sales. Currently, most such displays are based entirely upon an advanced liquid crystal technology requiring several precisely aligned LC layers. A new technology for flat-panel displays, based upon the solid-state luminescence of sol-gel derived microspheres has been proposed. Silica gel-derived microspheres can be prepared at near ambient temperatures, doped with either optically-active organic dye molecules or lanthanide ions. Microspheres doped to give red, blue, and green luminescence can be arranged in a pixel pattern to form the basis of a display screen. A single monochrome LC layer is used to modulate the excitation light, or pump source, that activates the fluorescence of each pixel.


2011 ◽  
Vol 65 (6) ◽  
Author(s):  
Tae Kim ◽  
Euh Jeong ◽  
Chae Oh ◽  
Min Shin ◽  
Jong-Pil Kim ◽  
...  

AbstractA series of neutral gelators and cationic amphiphiles derived from 1,2 diphenylethylenediamine (I) and 1,2-cyclohexanediamine (II) was synthesised. Helical silica nanotubes were prepared utilising these organic gelators through sol-gel polycondensation of tetraethoxy silane, (TEOS-silica source). Right- and left-handed helical nanotubes respectively were obtained from a 1: 1 mass mixture of optically active, (1S,2S)-III-(1S,2S)-V neutral gelator and (1S,2S)-IV-(1S,2S)-VI cationic amphiphile and a 1: 1 mass mixture of optically active, (1R,2R)-III-(1R,2R)-V neutral gelator and (1R,2R)-IV-(1R,2R)-VI cationic amphiphile, indicating that the handedness of the helical nanotubes varied with the change in the neutral gelator precursors used. The nanotubes were characterised by SEM images.


2005 ◽  
Vol 23 (12) ◽  
pp. 4249-4256 ◽  
Author(s):  
R.R. Thomson ◽  
H.T. Bookey ◽  
H. Ur-Rehman ◽  
S. Liu ◽  
N. Suyal ◽  
...  

1999 ◽  
Vol 581 ◽  
Author(s):  
L.L. Isaacs ◽  
V. Petricevic ◽  
BaoPing Wang ◽  
Jinpin Ying ◽  
R.R. Alfano

ABSTRACTSol - gel technology is used to prepare sub-micron to micron size particles of Chromium (IV) doped materials. These materials show strong luminescence, as single crystals, in the 1-2 μm range. Such materials include; Cr (IV): (Ca2GeO4, Mg2SiO4, LiScGeO4). The optically active particles are dispersed into glassy matrixes to form optical composites. Ongoing research is aimed at, a) reducing the size and the size distribution of the optically active particles, and b) finding suitable matrix materials.


2001 ◽  
Vol 16 (4) ◽  
pp. 463-473 ◽  
Author(s):  
M. Langlet ◽  
C. Coutier ◽  
J. Fick ◽  
M. Audier ◽  
W. Meffre ◽  
...  

2002 ◽  
Vol 49 (1) ◽  
pp. 221-229 ◽  
Author(s):  
W. Zhu ◽  
O. K. Tan ◽  
J. Ray ◽  
Md A. Imam ◽  
X. F. Chen

2008 ◽  
Author(s):  
Tor Grande ◽  
Edita Garskaite ◽  
Cecile Ladam ◽  
Kjetil Valset ◽  
Tommy Mokkelbost ◽  
...  

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