Infra red quantum dot photolithography

Gadipalli, R. R.; Martin, Lane; Heckman, B.; Story, J. G.; Bertino, Massimo F.; Fraundorf, P.; Guha, S.; Leventis, Nicholas

doi:10.1007/s10971-006-9120-1

Cited by 10 publications

(7 citation statements)

References 28 publications

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“…In this respect we mention that on the micrometer scale, different semiconductors can be deposited with photolithographic techniques on areas of the matrix, to create regular supra-arrays of selected geometries, e.g. hexagons or stripes 17,18,19 . We foresee that this property might be used to perform different calculations on different areas of the ma-trix.…”

Section: System and Redundant Encodingmentioning

confidence: 99%

“…While the first materials of this kind were based on silicates, more recently matrices with a well-defined pore size and pore arrangement have been reported also for high dielectric constant materials such as ZrO 2 10,11 , and mixed Si-Ti oxides 12,13,14,15 . Metal and semiconductor nanoparticles can be grown within the pores of these materials with techniques as varied as calcination 16 , photolithography 17,18,19 , and electrochemistry 20,21 . With these techniques, superlattices of quantum dots have been produced 22 .…”

Section: Introductionmentioning

confidence: 99%

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Mesoporous matrices for quantum computation with improved response through redundance

Hodgson

Bertino

Leventis

et al. 2007

Journal of Applied Physics

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We present a solid state implementation of quantum computation, which improves previously proposed optically driven schemes. Our proposal is based on vertical arrays of quantum dots embedded in a mesoporous material which can be fabricated with present technology. The redundant encoding typical of the chosen hardware protects the computation against gate errors and the effects of measurement induced noise. The system parameters required for quantum computation applications are calculated for II-VI and III-V materials and found to be within the experimental range. The proposed hardware may help minimize errors due to polydispersity of dot sizes, which is at present one of the main problems in relation to quantum dot-based quantum computation. (c) 2007 American Institute of Physics

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Section: System and Redundant Encodingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mesoporous matrices for quantum computation with improved response through redundance

Hodgson

Bertino

Leventis

et al. 2007

Journal of Applied Physics

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“…However, progress in this direction has been sluggish. Very recently, patterning of substrates with quantum dots was reported, and it was obtained with a bottom-up approach [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

X-ray spectroscopy study of local microstructures in CdSe quantum dots prepared by UV photolithography

DeSilva

Dehipawala

Gadipalli

et al. 2016

AIP Conference Proceedings

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“…For the NASA stardust project, density gradients were introduced by depositing layers with decreasing sol concentrations . Modulations within bulk monoliths have been reported by the Dunn group, which produced three-dimensional Ag patterns by multiphoton reduction of Ag + , and by our group which has produced metal and quantum dot patterns. ,,− These bulk patterning techniques, however, have limitations. Nanoparticles grown inside the pores affect the optical properties but not, for example, the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Sol−Gel Materials with Anisotropic Physical Properties by Photo-Cross-Linking

et al. 2009

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A method to vary locally the physical properties of a porous material is presented. A wet gel is first prepared following conventional sol-gel techniques. The pore walls are derivatized by adding to the gelling solution a silane carrying a polymerizable moiety such as trimethoxysilylpropyl. The solvent of the wet gel monolith is then exchanged with a solution of a monomer such as styrene and a photoinitiator such as 2,2′-azobis-isobutyronitrile. Illumination with ultraviolet light initiates polymerization which in turn engages the moiety dangling from the pore surfaces. Supercritically dried monoliths were characterized with techniques such as field-emission scanning electron microscopy (SEM), methylmethacrylate atomic force microscopy (AFM), Fourier transform infrared (FT-IR) spectroscopy, and Brunauer-Emmett-Teller surface area measurements. These structural characterization techniques showed that the silica nanoparticles making up the backbone of the monoliths were cross-linked by a polymer conformal coating. Mechanical characterization was carried out with nanoindentation and the three-point flexural method and showed that the properties of uniformly photo-cross-linked monoliths could be varied by varying exposure time. So, for example, the monolith density could be varied between about 0.21 and 0.97 g • cm -3 , the porosity between 6 and 87%, and Young's modulus between 9 and about 1800 MPa. Overall, the characterization techniques show that photo-cross-linked monoliths have physical and mechanical properties comparable and often superior to those of monoliths obtained by thermally initiated cross-linking (see, for example,

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Infra red quantum dot photolithography

Cited by 10 publications

References 28 publications

Mesoporous matrices for quantum computation with improved response through redundance

Mesoporous matrices for quantum computation with improved response through redundance

X-ray spectroscopy study of local microstructures in CdSe quantum dots prepared by UV photolithography

Fabrication of Sol−Gel Materials with Anisotropic Physical Properties by Photo-Cross-Linking

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