Rewritable 3D Bit Optical Data Storage in a PMMA-Based Photorefractive Polymer

Day, Daniel; Gu, Miṅ; Smallridge, Andrew J.

doi:10.1002/1521-4095(200107)13:12/13<1005::aid-adma1005>3.0.co;2-7

Cited by 72 publications

(56 citation statements)

References 6 publications

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“…In addition, light offers the possibility to change the polymer properties in very confined spaces by using for instance confocal or holographic methods. 208 This feature can not only be applied to create patterns with nanometric precision in polymer thin films, 196 but also renders photo-sensitive materials especially interesting for applications in the nanoscale. 196,209 Finally, light-sensitive materials are not only characterized by the high spatial resolution of their response but also by the increased resolution of their response time.…”

Section: Light As a Triggermentioning

confidence: 99%

Light-Sensitive Polymeric Nanoparticles Based on Photo-Cleavable Chromophores

Klinger

2013

Springer Theses

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This thesis focuses on the design, synthesis and characterization of novel photo-sensitive microgels and nanoparticles as potential materials for the loading and light-triggered release/accessibility of functional compounds. In order to realize this concept, different approaches to irradiation-dependent response mechanisms have been investigated.Novel light-cleavable divinyl functionalized monomeric crosslinkers based on o-nitrobenzyl derivatives were synthesized and used for the preparation of either PMMA or hydroxyl functionalized PHEMA microgels swellable and degradable in organic solvents. By the introduction of anionic MAA moieties into the PHEMA microgels, this concept was successfully transferred to double stimuli-responsive p(HEMA-co-MAA) hydrogel nanoparticles exhibiting a pH-dependent swelling and light-induced degradation behavior in aqueous media. This sensitivity to two orthogonal triggers is proposed to combine a pHinduced post-formation loading mechanism with a pH-and light-triggered release. In addition, a new class of enzyme-and light-sensitive PAAm microgels based on (meth-)acrylate functionalized dextrans as photo-and enzymatically degradable macromolecular crosslinkers was developed by introducing a photo-labile linker between the enzymatically degradable dextran chain and the polymerizable vinyl moieties. Here, the water solubility of the crosslinkers is assumed to enable an in situ loading approach of hydrophilic compounds.A different approach to the loading of microgels is based on photo-labile covalent microgel-drug conjugates. The first step to the realization of this concept was achieved by the development of a novel functional monomer consisting of a doxorubicin molecule covalently attached to a radically polymerizable methacrylate group via a photo-cleavable linker.Moreover, in order to enable the release of hydrophobic substances in aqueous media, hydrophobic nanoparticles consisting of a photo-resist polymer were designed to be degradable upon irradiation in water. Light-triggered conversion of the initial hydrophobic polymer into hydrophilic PMAA induced in situ particle dissolution and release of nile red.Since the introduction of a stimuli-responsive shell around a microgel is assumed to prevent leakage of embedded compounds, studies on non-stimuli-responsive shell formation around preformed microgel seed particles and the formation of microgel cores in polymeric shells were conducted to investigate potential synthetic pathways to this approach.In a last attempt, the surface of PHEMA and p(HEMA-co-MAA) microgels was functionalized with cinnamoyl groups in order to trigger the (reversible) particles interaction with each other by light-induced [2+2] cycloaddition reactions.

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Section: Light As a Triggermentioning

confidence: 99%

Light-Sensitive Polymeric Nanoparticles Based on Photo-Cleavable Chromophores

Klinger

2013

Springer Theses

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“…Many efforts have been made to realize three-dimensional (3D) optical storage in recent years for their potential applications to high density optical data memories [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Femtosecond (fs) laser pulse is a prospective tool for 3D fabrication since the ultrashort pulse duration and extremely high local intensity make it possible to fabricate 3D structures of sub-wavelength scale even in transparent materials through multi-photon absorption, and the photomodified region can be well defined due to the non-thermal nature of the light-matter interaction [13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…Poly(methyl methacrylate), PMMA, is an interesting material for 3D optical storage due to its high chemical resistance, advantageous optical properties and low cost [9][10][11][12]. The detection of stored bits is usually done by means of a refractive index change or a fluorescent signal.…”

Section: Introductionmentioning

confidence: 99%

“…The use of the latter can give rise to a much enhanced signalto-noise (S/N) ratio, compared to the former [15][16][17][18][19][20]. Previous research on 3D optical memories with PMMA-based material has demonstrated the use of refractive-index modification [9], micro-voids formation, [10,11], and photoluminescence (PL) change [11,12]. Yamasaki et al [12] have reported that voids can be formed in PMMA by single-shot ultrashort pulses at 400 nm and these voids can be read out under two-photon excitation.…”

Section: Introductionmentioning

confidence: 99%

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Femtosecond laser induced photoluminescence in poly(methyl methacrylate) and three-dimensional optical storage

Nie

Lim

Lee

et al. 2011

Journal of Luminescence

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“…[1][2][3][4][5] The places where these polymer composites are finding application include Li + battery, [6] humidity sensors, [7] ionic display devices, [8] H 2 /O 2 fuel cell, [9,10] photovoltaic polymeric solar cell, [11] magneto optical data storage devices, [12] gas sensors, [13][14][15] laptop monitors, [16] just to mention a few cases of advanced technological applications. Before these polymers or polymer/composite systems can be applied in any of the above-mentioned applications, however, they have to be thoroughly characterized for their glass transition temperature, mechanical strength, dielectric behavior, electrical and thermal conductivity, surface morphology, thermal expansion, etc.…”

Section: Introductionmentioning

confidence: 99%

Modifying Thermal Expansion of Polymer Composites by Blending with a Negative Thermal Expansion Material

Chandra

Meyer

Best

et al. 2007

Macro Materials & Eng

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Large positive thermal expansion in polymers is one of the major drawbacks in using polymers in applications where the sample dimensions play an important role. In this paper, we report a method to vary the thermal expansion of PMMA‐based polymer composites by blending with a negative thermal expansion material, PbTiO3. It is shown that the thermal expansion coefficient of the composite can be tailored by suitably adjusting the ratio of polymer and ceramic filler. The coefficient of thermal expansion has been measured using temperature‐dependent step‐height measurements via confocal microscopy. Using SEM, it is shown that the ceramic particles are homogeneously dispersed in the polymer matrix if the composite is obtained by the polymerization of the suspension of PbTiO3 in the monomer MMA. Composite formation is confirmed using XRD and Raman spectroscopy. To estimate the technological viability of such composite films, preliminary results of stress‐strain measurements are also presented.magnified image

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Rewritable 3D Bit Optical Data Storage in a PMMA-Based Photorefractive Polymer

Cited by 72 publications

References 6 publications

Light-Sensitive Polymeric Nanoparticles Based on Photo-Cleavable Chromophores

Light-Sensitive Polymeric Nanoparticles Based on Photo-Cleavable Chromophores

Femtosecond laser induced photoluminescence in poly(methyl methacrylate) and three-dimensional optical storage

Modifying Thermal Expansion of Polymer Composites by Blending with a Negative Thermal Expansion Material

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