Preparation and Third-Order Optical Nonlinearity of Self-Assembled Chitosan/CdSe−ZnS Core−Shell Quantum Dots Multilayer Films

Wang, Xiaohui; Du, Yong; Ding, Sha; Wang, Qu‐Quan; Xiong, Guangquan; Xie, Min; Shen, Xin‐Cheng; Pang, Dai‐Wen

doi:10.1021/jp055916c

Cited by 109 publications

(59 citation statements)

References 32 publications

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“…To demonstrate the enhancement of PL from quantum emitters by silver nanoanteanna rings, a monolayer of CdSe/ZnS semiconductor quantum dots (SQDs) were self-assembled on a quartz glass substrate by electrostatic interactions (see Fig. S2 of the Supporting Information), [53][54][55][56] and then the silver nanorings were dropped onto the separation layer. The excitation laser, with a wavelength 532 nm, illuminated the CdSe/ZnS SQDs from the back side of the substrate with an incidence angle u in ¼ 60 8-82 8 (see Fig.…”

Section: Tunable Photoluminescence Enhancement By Silver Nanoantenna mentioning

confidence: 99%

Illuminating Dark Plasmons of Silver Nanoantenna Rings to Enhance Exciton–Plasmon Interactions

Gong

Zhou

et al. 2009

Adv Funct Materials

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The chemical growth of silver nanorings that possess singly twinned crystals and a circular cross section via a reductive reaction solution is reported. The wire and ring diameters of the synthesized nanorings are in the ranges 80–200 nm and 4.5–18.0 μm, respectively. By lighting up the multipolar dark plasmons with slanted illumination, the silver nanoring exhibits unique focused scattering and large local‐field enhancement. We also demonstrate strong exciton–plasmon interactions between a monolayer of CdSe/ZnS semiconductor quantum dots and a single silver antenna‐like nanoring (nanoantenna) at the “hot spots” located at the cross points of the incident plane and nanoring; the position of these spots are tunable by adjusting the incidence angle of illumination. The tunable plasmonic behavior of the silver nanorings could find applications as optical nanoantennae or plasmonic nanocavities.

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Section: Tunable Photoluminescence Enhancement By Silver Nanoantenna mentioning

confidence: 99%

Illuminating Dark Plasmons of Silver Nanoantenna Rings to Enhance Exciton–Plasmon Interactions

Gong

Zhou

et al. 2009

Adv Funct Materials

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“…Third-order nonlinear optical (NLO) materials with weak nonlinear absorption (NLA) but strong nonlinear refraction (NLR) have attracted considerable attention because of their potential uses in the optical signal processing devices [8][9][10][11][12][13]. The Z-scan method has gained rapid acceptance by the nonlinear optics community as a standard technique for separately determining the nonlinear changes in index and changes in absorption.…”

Section: Introductionmentioning

confidence: 99%

Structural, Electrical and Optical Characterization Studies on Glycine Picrate Single Crystal : A Third Order Nonlinear Optical Material

Devi¹,

Lawrence²,

Babu³

et al. 2009

JMMCE

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Single crystal of an organic nonlinear optical (NLO) material, Glycine picrate (GP), was grown by slow cooling method. The structural perfection of the grown crystal was analyzed by highresolution X-ray diffraction (rocking curve) measurements. UV-Visible-NIR spectral analysis was used to determine the optical constants and band gap of GP. The nature of variation of dielectric constant with frequency at different temperatures was investigated.Third-order optical nonlinearities of GP crystal were investigated. Etch patterns of the grown crystal quality were studied.

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“…Researchers are focusing on semiconductor nanocrystals or quantum dots (QDs) in recent years, [1][2][3][4][5][6][7] due to their unique physical properties and promising potential applications in photonics, solar cells, biotechnology, medicine, and imaging. QDs became more important in the field of nanoscience because of their unique electronic and optical properties such as narrow emission bands, continuous broad absorption band, high quantum yields, and high resistance to photobleaching compared with traditional organic fluorophores.…”

Section: Introductionmentioning

confidence: 99%

Using CdTe/ZnSe core/shell quantum dots to detect DNA and damage to DNA

Moulick

Milosavljević

Vlachova

et al. 2017

IJN

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CdTe/ZnSe core/shell quantum dot (QD), one of the strongest and most highly luminescent nanoparticles, was directly synthesized in an aqueous medium to study its individual interactions with important nucleobases (adenine, guanine, cytosine, and thymine) in detail. The results obtained from the optical analyses indicated that the interactions of the QDs with different nucleobases were different, which reflected in different fluorescent emission maxima and intensities. The difference in the interaction was found due to the different chemical behavior and different sizes of the formed nanoconjugates. An electrochemical study also confirmed that the purines and pyrimidines show different interactions with the core/shell QDs. Based on these phenomena, a novel QD-based method is developed to detect the presence of the DNA, damage to DNA, and mutation. The QDs were successfully applied very easily to detect any change in the sequence (mutation) of DNA. The QDs also showed their ability to detect DNAs directly from the extracts of human cancer (PC3) and normal (PNT1A) cells (detection limit of 500 pM of DNA), which indicates the possibilities to use this easy assay technique to confirm the presence of living organisms in extreme environments.

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Preparation and Third-Order Optical Nonlinearity of Self-Assembled Chitosan/CdSe−ZnS Core−Shell Quantum Dots Multilayer Films

Cited by 109 publications

References 32 publications

Illuminating Dark Plasmons of Silver Nanoantenna Rings to Enhance Exciton–Plasmon Interactions

Illuminating Dark Plasmons of Silver Nanoantenna Rings to Enhance Exciton–Plasmon Interactions

Structural, Electrical and Optical Characterization Studies on Glycine Picrate Single Crystal : A Third Order Nonlinear Optical Material

Using CdTe/ZnSe core/shell quantum dots to detect DNA and damage to DNA

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