Monodisperse Oligo(phenylene vinylene) Ligands on CdSe Quantum Dots:  Synthesis and Polarization Anisotropy Measurements

Sudeep, P. K.; Early, Kevin T.; McCarthy, Kevin; Odoi, Michael Y.; Barnes, Michael D.; Emrick, Todd

doi:10.1021/ja077409+

Cited by 43 publications

(44 citation statements)

References 22 publications

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“…To coat inorganic nanoparticles with a dense and stable layer of polymer chains two strategies exist, which are either grafting to or grafting from [26][27][28][29][30][31][32][33][34][35] (see Figure 2). From a polymer perspective the grafting to approach offers here the advantage that the polymer chains used for grafting can be Polymeric surfactants [7,9,[18][19][20]22,23] offer here advantages for the solubilisation of inorganic nano-objects because polymers themselves are objects of nanometre dimensions (for comparison: the alkyl chain in a detergent may possess 18 C-C bonds, while a polymer chain of a degree of 100 has 200 C-C bonds, which bring it, even in the coiled conformation, to the size of many nms).…”

Section: Concepts For the Functionalization Of Inorganic Nanoparticlementioning

confidence: 99%

Section: Concepts For the Functionalization Of Inorganic Nanoparticlementioning

confidence: 99%

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Polymer Coated Semiconducting Nanoparticles for Hybrid Materials

Zentel

2020

Inorganics

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This paper reviews synthetic concepts for the functionalization of various inorganic nanoparticles with a shell consisting of organic polymers and possible applications of the resulting hybrid materials. A polymer coating can make inorganic nanoparticles soluble in many solvents as individual particles and not only do low molar mass solvents become suitable, but also polymers as a solid matrix. In the case of shape anisotropic particles (e.g., rods) a spontaneous self-organization (parallel orientation) of the nanoparticles can be achieved, because of the formation of lyotropic liquid crystalline phases. They offer the possibility to orient the shape of anisotropic nanoparticles macroscopically in external electric fields. At least, such hybrid materials allow semiconducting inorganic nanoparticles to be dispersed in functional polymer matrices, like films of semiconducting polymers. Thereby, the inorganic nanoparticles can be electrically connected and addressed by the polymer matrix. This allows LEDs to be prepared with highly fluorescent inorganic nanoparticles (quantum dots) as chromophores. Recent works have aimed to further improve these fascinating light emitting materials.

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Section: Concepts For the Functionalization Of Inorganic Nanoparticlementioning

confidence: 99%

Section: Concepts For the Functionalization Of Inorganic Nanoparticlementioning

confidence: 99%

Polymer Coated Semiconducting Nanoparticles for Hybrid Materials

Zentel

2020

Inorganics

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“…This implies that the ligands were affecting the CdSe quantum dot in an additive manner—the more ligands, the greater the enhanced properties. More recently, Emrick and Barnes have characterized the quenching of the fluorescent lifetimes of the quantum dot cores by the polymer ligands [61,62] as well as described the composite nanostructures in terms of linear dipoles through polarization anisotropy measurements [63]. …”

Section: Ligand Exchange and Designmentioning

confidence: 99%

“…However, if the ligands on the quantum dots themselves could serve as both the dispersive agent and the charge conduits then one would have a fully integrated building block without the need for hybrid blends. Such as system was recently investigated by Majima [166] and is the basis for the development of the CdSe-OPV nanostructures developed by Emrick [56,57,59,60,61,62,63]. Sargent also recently reported that the use of thiol ligands on PbS quantum dots resulted in much greater photovoltaic device efficiency in the infrared region of the electromagnetic spectrum [175,179].…”

Section: Solar Cellsmentioning

confidence: 99%

Semiconductor Nanocrystals Hybridized with Functional Ligands: New Composite Materials with Tunable Properties

2010

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Semiconductor nanocrystals hybridized with functional ligands represent an important new class of composite nanomaterials. The development of these new nanoscale building blocks has intensified over the past few years and offer significant advantages in a wide array of applications. Functional ligands allow for incorporation of nanocrystals into areas where their unique photophysics can be exploited. Energy and charge transfer between the ligands and the nanocrystal also result in enhanced physical properties that can be tuned by the choice of ligand architecture. Here, progress in the development and applications involving this new class of composite materials will be discussed.

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“…Novel nanomaterials such as quantum dots [1], colloidal nanoparticles [2,3], nanowires [4], nanohorns [5], and nanotubes [6] have been widely investigated and some of them have found wide applications in the fields of biomedicine and pharmacy. Of these nanomaterials, carbon nanotubes (CNTs) have been considered as one of the most potential novel biomedical materials because of their high aspect ratio, propensity to functional modification, supportive substrate [7], favorable biocompatibility and low toxicity to biological systems [8].…”

Section: Introductionmentioning

confidence: 99%

Pharmacia and biological functionalities of nutrient broth dispersed multi-walled carbon nanotubes: A novel drug delivery system

Xiao

Huang

2010

Sci. China Chem.

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A new drug delivery system was developed using the interaction of nutrient broth treated multi-walled carbon nanotubes (NBT-MWCNTs) and cefotaxime sodium (CTX) as a model. Investigated factors of the drug delivery system include dispersion effect, biocompatibility of NBT-MWCNTs, pharmacodynamic effect and delivery efficiency in vitro. It was found that MWCNTs can be well dispersed in the nutrient broth and stable at least for one week at 4 °C. The formed NBT-MWCNTs suspension scarcely exhibits toxicity to E. coli at concentrations lower than 10.24 g/mL, but displays enhanced pharmacodynamic effect of CTX via its bridge effect and targeted transport. Compared with general acid treated MWCNTs (AT-MWCNTs), our present NBT-MWCNTs show good biocompatibility, enhanced pharmacodynamic effect, and high delivery efficiency.drug delivery system, multiwalled carbon nanotubes, biocompatibility, pharmacodynamic effect, flow cytometry

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Monodisperse Oligo(phenylene vinylene) Ligands on CdSe Quantum Dots: Synthesis and Polarization Anisotropy Measurements

Cited by 43 publications

References 22 publications

Polymer Coated Semiconducting Nanoparticles for Hybrid Materials

Polymer Coated Semiconducting Nanoparticles for Hybrid Materials

Semiconductor Nanocrystals Hybridized with Functional Ligands: New Composite Materials with Tunable Properties

Pharmacia and biological functionalities of nutrient broth dispersed multi-walled carbon nanotubes: A novel drug delivery system

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