Synthesis of Cadmium Arsenide Quantum Dots Luminescent in the Infrared

Harris, Daniel K.; Allen, Peter M.; Han, Hee Sun; Walker, Brian; Lee, Jungmin; Bawendi, Moungi G.

doi:10.1021/ja1101932

Cited by 77 publications

(76 citation statements)

References 29 publications

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“…Currently, synthetic methods permit us to choose QDs with almost any emission from the UV to the SWIR. [100][101][102][103] Yet, although QDs are very bright and photostable, their range of application in vivo has been traditionally limited due to toxicity concerns. Traditional QDs for in vivo imaging contain toxic ions, such as Cd, Hg, Te, Pb, etc., which can be released upon corrosion.…”

Section: Photoluminescencementioning

confidence: 99%

Tailoring the interplay between electromagnetic fields and nanomaterials toward applications in life sciences: a review

Pino¹

2014

J. Biomed. Opt

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Abstract. Continuous advances in the field of bionanotechnology, particularly in the areas of synthesis and functionalization of colloidal inorganic nanoparticles with novel physicochemical properties, allow the development of innovative and/or enhanced approaches for medical solutions. Many of the present and future applications of bionanotechnology rely on the ability of nanoparticles to efficiently interact with electromagnetic (EM) fields and subsequently to produce a response via scattering or absorption of the interacting field. The crosssections of nanoparticles are typically orders of magnitude larger than organic molecules, which provide the means for manipulating EM fields and, thereby, enable applications in therapy (e.g., photothermal therapy, hyperthermia, drug release, etc.), sensing (e.g., surface plasmon resonance, surface-enhanced Raman, energy transfer, etc.), and imaging (e.g., magnetic resonance, optoacoustic, photothermal, etc.). Herein, an overview of the most relevant parameters and promising applications of EM-active nanoparticles for applications in life science are discussed with a view toward tailoring the interaction of nanoparticles with EM fields. © The Authors.Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Section: Photoluminescencementioning

confidence: 99%

Tailoring the interplay between electromagnetic fields and nanomaterials toward applications in life sciences: a review

Pino¹

2014

J. Biomed. Opt

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“…It is used in batteries, in electroplating, as a barrier to control nuclear fission, for manufacturing of pigments, as stabilizers of plastics, etc. Cadmium is in laboratories used for preparation of cadmiumselenide quantum dots, which emit luminescence after excitation (Beri et al 2011;Fortes et al 2011;Harris et al 2011;Kumar and Biradar 2011). Cadmium has no biological role in the living organisms.…”

Section: Cadmium As An Important Contaminant Of Living Environmentmentioning

confidence: 99%

Cadmium Accumulation by Plants of Brassicaceae Family and Its Connection with Their Primary and Secondary Metabolism

Babula

Adam

Havel

et al. 2012

The Plant Family Brassicaceae

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The mustard family -Brassicaceae -is well known as family of plants, metallophytes, which are able to accumulate wide range of heavy metals and metalloids, especially zinc and cadmium, but also nickel, thallium, chromium and selenium. Ecological importance of this process consists partially in plants themselves to survive negative environmental conditions. There are two basic different strategies, how to survive these conditions -accumulation of heavy metals in plants tissues with different intensity in individual cell types, but also organs, which is partially given by chemical composition of cell walls, and ability to synthesize special defensive -detoxification compounds rich on thiol groupsglutathione and phytochelatins, which are able to bind heavy metals and transport them to the "secure" cell compartment -vacuole. The second principle is based on ability to exclude heavy metals. Role of secondary metabolites rich on sulphur in detoxification of heavy metals is still discussed with unclear conclusions. Members of Brassicaceae family, especially genera Thlaspi and Brassica, are well-known hyperaccumulators of heavy metals with possible utilization in phytoremediation technologies. In this review chapter, mechanisms of cadmium uptake and transport and its deposition in various plant cells and tissues are discussed with respect with

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“…Previously, our group fabricated photovoltaic devices with pentacene/lead sulphide (PbS) nanocrystal heterojunctions 29 . However, PbS nanocrystal syntheses often yield only moderately monodisperse samples, presumably owing to the rapid reaction of their precursors [41][42][43] . In this study, we fabricate bilayer photovoltaic cells with pentacene, using lead selenide (PbSe) nanocrystals as the infrared absorbing material.…”

mentioning

confidence: 99%

In situ measurement of exciton energy in hybrid singlet-fission solar cells

et al. 2012

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singlet exciton fission-sensitized solar cells have the potential to exceed the shockley-Queisser limit by generating additional photocurrent from high-energy photons. Pentacene is an organic semiconductor that undergoes efficient singlet fission-the conversion of singlet excitons into pairs of triplets. However, the pentacene triplet is non-emissive, and uncertainty regarding its energy has hindered device design. Here we present an in situ measurement of the pentacene triplet energy by fabricating a series of bilayer solar cells with infrared-absorbing nanocrystals of varying bandgaps. We show that the pentacene triplet energy is at least 0.85 eV and at most 1.00 eV in operating devices. our devices generate photocurrent from triplets, and achieve external quantum efficiencies up to 80%, and power conversion efficiencies of 4.7%. This establishes the general use of nanocrystal size series to measure the energy of non-emissive excited states, and suggests that fission-sensitized solar cells are a favourable candidate for third-generation photovoltaics.

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Synthesis of Cadmium Arsenide Quantum Dots Luminescent in the Infrared

Cited by 77 publications

References 29 publications

Tailoring the interplay between electromagnetic fields and nanomaterials toward applications in life sciences: a review

Tailoring the interplay between electromagnetic fields and nanomaterials toward applications in life sciences: a review

Cadmium Accumulation by Plants of Brassicaceae Family and Its Connection with Their Primary and Secondary Metabolism

In situ measurement of exciton energy in hybrid singlet-fission solar cells

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