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On-chip photonic Fourier transform with surface plasmon polaritons

Light(Science & Applications) 2016年第1期5卷 618-623页

作者： Shan Shan Kou Guanghui Yuan Qian Wang Luping Du eugeniu balaur Daohua Zhang Dingyuan Tang Brian Abbey Xiao-Cong Yuan Jiao Lin Department of Chemistry and Physics La Trobe Institute for Molecular Science(LIMS)La Trobe UniversityMelbourneVIC 3086Australia Australian Research Council Centre of Excellence for Advanced Molecular Imaging Australia School of Physics The University of MelbourneVIC 3010Australia Centre for Disruptive Photonic Technologies Nanyang Technological UniversitySingapore 637371Singapore Institute of Materials Research and Engineering A*STAR3 Research LinkSingapore 117602Singapore Nanophotonics Research Centre Shenzhen University&Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore 639798Singapore School of Engineering RMIT UniversityMelbourneVIC 3001Australia

The Fourier transform(FT),a cornerstone of optical processing,enables rapid evaluation of fundamental mathematical operations,such as derivatives and ***,a converging lens performs an optical FT in free space when light passes through *** speed of the transformation is limited by the thickness and the focal length of the *** using the wave nature of surface plasmon polaritons(SPPs),here we demonstrate that the FT can be implemented in a planar configuration with a minimal propagation distance of around 10 mm,resulting in an increase of speed by four to five orders of *** photonic FT was tested by synthesizing intricate SPP waves with their Fourier *** reduced dimensionality in the minuscule device allows the future development of an ultrafast on-chip photonic information processing platform for large-scale optical computing.

关键词： diffraction Fourier optics optical computing optical information processing surface plasmon polaritons

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Progress in Natural Science:Materials International 2015年第2期25卷 122-130页

作者： Valentina Mitran Madalina Georgiana Albu eugeniu Vasile Anisoara Cimpean Marieta Costache University of Bucharest Faculty of Biology Department of Biochemistry and Molecular Biology INCDTP – Division Leather and Footwear Research Institute Collagen Department 3. University Politehnica of Bucharest Advanced Polymer Materials Group

This paper aims at demonstrating the biocompatibility of recently developed 3D hydrogel scaffolds containing the same amount of collagen(COLL) and variable concentrations of sericin(SS) in order to find the most suitable formula for adipose tissue engineering(ATE) *** scaffolds were obtained by COLL crosslinking with glutaraldehyde followed by freeze-drying and, subsequently, seeded with 3T3-L1 preadipocytes. Scanning electron microscopy studies revealed the scaffolds’ architecture and cellular colonization. Also, in vitro biocompatibility of the developed scaffolds was evaluated by LDH and MTT assays and Live/Dead analysis of 3T3-L1 preadipocyte populating these 3D *** best results in terms of cell survival and proliferation status were obtained in the case of the hybrid COLL scaffold containing 40% SS(COLL–SS4). Furthermore, the biological performance of the analyzed COLL-based hydrogels at 5- and 8- days post-seeding was found to decrease as follows: COLL–SS4 4 COLL–SS2 4 COLL 4 COLL–SS6. Consequently, our study highlights that hybrid scaffolds obtained by the addition of variable concentrations of SS to a constant COLL composition positively influences the behavior of 3T3-L1 cells with the exception of the COLL–SS6 matrix(60% SS). Altogether, the data obtained recommend SS as a component of COLL-based hydrogels providing them with features that may be useful in ATE applications.

关键词： Sericin–collagen scaffold Preadipocyte Proliferation Morphology Tissue engineering

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In vitro characterization of novel nanostructured collagen-hydroxyapatite composite scaffolds doped with magnesium with improved biodegradation rate for hard tissue regeneration

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Bioactive Materials 2021年第10期6卷 3383-3395页

作者： Iulian V.Antoniac Aurora Antoniac eugeniu Vasile Camelia Tecu Marco Fosca Viktoriya G.Yankova Julietta V.Rau University Politehnica of Bucharest 313 Splaiul Independentei StreetDistrict 6060042BucharestRomania Academy of Romanian Scientists 54 Splaiul Independentei StreetDistrict 5050094BucharestRomania Istituto di Struttura della Materia Consiglio Nazionale delle Ricerche(ISM-CNR)Via del Fosso del Cavaliere10000133RomeItaly Sechenov First Moscow State Medical University Institute of PharmacyDepartment of AnalyticalPhysical and Colloid ChemistryTrubetskaya 8Build.2Moscow119991Russia

New materials are required for bone healing in regenerative medicine able to temporarily substitute damaged bone and to be subsequently resorbed and replaced by endogenous *** inspiration from basic composition of the mammalian bones,composed of collagen,apatite and a number of substitution ions,among them magnesium(Mg2+),in this work,novel composite scaffolds composed of collagen(10%)-hydroxyapatite(HAp)(90%)and collagen(10%)-HAp(80%)-Mg(10%)were *** lyophilization was used for composites *** insight into the nanostructural nature of the developed scaffolds was performed by Scanning Electron Microscopy coupled with Energy Dispersive X-Ray and Transmission Electron Microscopy coupled with Energy Dispersive *** HAp nanocrystallite clusters and Mg nanoparticles were homogeneously distributed within the scaffolds and adherent to the collagen *** samples were tested for degradation in Simulated Body Fluid(SBF)solution by soaking for up to 28 *** release of Mg from collagen(10%)-HAp(80%)-Mg(10%)composite during the period of up to 21 days was attested,this composite being characterized by a decreased degradation rate with respect to the composite without *** developed composite materials are promising for applications as bone substitute materials favouring bone healing and regeneration.

关键词： Composite Collagen Hydroxyapatite Magnesium Scaffold Hard tissue regeneration Scaffold degradation

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