Liquid crystalline siloxanes containing spiropyran chromophores as reversible optical data storage materials

1992 ◽  
Vol 1 (6) ◽  
pp. 293-297 ◽  
Author(s):  
L. V. Natarajan ◽  
V. Tondiglia ◽  
T. J. Bunning ◽  
R. L. Crane ◽  
W. W. Adams
Keyword(s):  
Data Storage ◽  
Liquid Crystalline ◽  
Optical Data Storage ◽  
Optical Data ◽  
Storage Materials ◽  
Data Storage Materials

scholarly journals Chemical characterization of optical data storage materials by EPMA

2002 ◽  
Vol 8 (S02) ◽  
pp. 1488-1489
Author(s):  
S. Richter ◽  
M. Bückins ◽  
S. Kyrsta ◽  
R. Cremer
Keyword(s):  
Data Storage ◽  
Chemical Characterization ◽  
Optical Data Storage ◽  
Optical Data ◽  
Storage Materials ◽  
Data Storage Materials

Ion-Assisted Deposition of Protective Overlayers for Magneto-Optic Alloys

1988 ◽  
Vol 128 ◽  
Author(s):  
Kenneth D. Cornett ◽  
Ursula J. Gibson ◽  
Anthony Taylor
Keyword(s):  
Rare Earth ◽  
Data Storage ◽  
Optical Data Storage ◽  
Optical Data ◽  
Iron Films ◽  
Transition Metal Alloys ◽  
Refractory Oxides ◽  
Porous Microstructure ◽  
Data Storage Materials ◽  
Magneto Optic

ABSTRACTRare-Earth Transition-Metal alloys such as Tb-Fe-Co are being studied and used as magneto-optic data storage materials. These materials are susceptible to oxidation by either oxygen or water vapor, particularly the rare earth component. Pitting corrosion is also a problem when protective overlayers have pinholes or a porous microstructure. Both degradation mechanisms are significant for application of this material to optical data storage. We have used ion assisted deposition (IAD) to produce protective overlayers of refractory oxides, such as Al2O2 and ZrO2. These layers were deposited both with and without IAD onto iron films and exposed to environments with controlled temperature and humidity. A scanning micro-reflectometer capable of detecting micrometer-sized pinholes was used to monitor the degradation of the iron layer with exposure time.

Photoinduced Reorientation and Multiple Optical Data Storage in Photo-Cross-Linkable Liquid Crystalline Copolymer Films Using 405 nm Light

2006 ◽  
Vol 39 (9) ◽  
pp. 3245-3251 ◽  
Author(s):  
Nobuhiro Kawatsuki ◽  
Kunihisa Kato ◽  
Tomoko Shiraku ◽  
Takeshi Tachibana ◽  
Hiroshi Ono
Keyword(s):  
Data Storage ◽  
Liquid Crystalline ◽  
Optical Data Storage ◽  
Optical Data ◽  
Copolymer Films

A2BA2-Type Amphiphilic Liquid Crystalline Block Copolymers by ATRP: Synthesis and Characterization

2010 ◽  
Vol 428-429 ◽  
pp. 154-157 ◽  
Author(s):  
Xin De Tang ◽  
Nian Feng Han ◽  
Jing Xu
Keyword(s):  
Block Copolymers ◽  
Data Storage ◽  
Liquid Crystalline ◽  
Optical Switch ◽  
Gel Permeation Chromatography ◽  
Optical Data Storage ◽  
Optical Data ◽  
Esterification Reaction ◽  
Scanning Calorimetry ◽  
Hexyl Methacrylate

A2BA2-type amphiphilic liquid crystalline block copolymers containing azobenzene were synthesized by atom transfer radical polymerization (ATRP). The macroinitiator prepared by the esterification reaction between poly(ethylene glycol) (PEG) and 2,2-dichloroacetyl chloride was used to initiate the ATRP of 6-[4-(4-ethoxyphenylazo)phenoxy]hexyl methacrylate (M6C). The resulting macroinitiator and block copolymers were characterized by 1H NMR, gel permeation chromatography (GPC). Polarizing optical microscopy (POM) and differential scanning calorimetry (DSC) preliminarily revealed the liquid crystalline property of these block copolymers. These novel amphiphilic liquid crystalline block copolymers are promising in some areas, such as optical data storage, optical switch, and molecular devices.

Novel Azobenzene Homopolymers via Atom Transfer Radical Polymerization Initiated by an Azobenzene Derivative

2010 ◽  
Vol 663-665 ◽  
pp. 92-95
Author(s):  
Xin De Tang ◽  
De Jie Zhou ◽  
Nian Feng Han
Keyword(s):  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Data Storage ◽  
Liquid Crystalline ◽  
Optical Switch ◽  
Optical Data Storage ◽  
Optical Data ◽  
Atom Transfer ◽  
Scanning Calorimetry ◽  
Crystalline Property

An azobenzene derivative substituted with a 2-bromoisobutyryl group was used as an initiator for the atom transfer radical polymerization of 2-[4-(4-ethoxyphenylazo)phenoxy]ethyl methacrylate) (MAZO). The resulting homopolymers (AZO-PMAZO) possess azobenzene moieties both in the main chain and in the side chain. Differential scanning calorimetry (DSC) and polarized optical microscopy (POM) preliminarily revealed the liquid crystalline property of these polymers. The novel liquid crystalline polymers are expected to act as the candidates in some promising areas including optical data storage, optical switch, and molecular devices.

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