Robust Microstructures Using UV Photopatternable Semiconductor Nanocrystals

Kim, Won Jin; Kim, Sung Jin; Lee, Kwang Sup; Samoć, Marek; Cartwright, Alexander N.; Prasad, Paras N.

doi:10.1021/nl8016219

Cited by 65 publications

(55 citation statements)

References 21 publications

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“…Two different methods shown in Figure a were adapted to synthesize photo‐patternable QDs (PQDs). The first method involved the stabilization of the QDs with a ligand containing thiol at one end and a t ‐butoxycarbonyl ( t ‐BOC) group at the other end to give PQD1 …”

Section: Hybrids Of Colloidal Inorganic Nanoparticles and π‐Conjugatementioning

confidence: 99%

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Energy and Charge Transfer in Nanoscale Hybrid Materials

Basché

Bottin

et al. 2015

Macromol. Rapid Commun.

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Hybrid materials composed of colloidal semiconductor quantum dots and π-conjugated organic molecules and polymers have attracted continuous interest in recent years, because they may find applications in bio-sensing, photodetection, and photovoltaics. Fundamental processes occurring in these nanohybrids are light absorption and emission as well as energy and/or charge transfer between the components. For future applications it is mandatory to understand, control, and optimize the wide parameter space with respect to chemical assembly and the desired photophysical properties. Accordingly, different approaches to tackle this issue are described here. Simple organic dye molecules (Dye)/quantum dot (QD) conjugates are studied with stationary and time-resolved spectroscopy to address the dynamics of energy and ultra-fast charge transfer. Micellar as well as lamellar nanostructures derived from diblock copolymers are employed to fine-tune the energy transfer efficiency of QD donor/dye acceptor couples. Finally, the transport of charges through organic components coupled to the quantum dot surface is discussed with an emphasis on functional devices.

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Section: Hybrids Of Colloidal Inorganic Nanoparticles and π‐Conjugatementioning

confidence: 99%

Section: Hybrids Of Colloidal Inorganic Nanoparticles and π‐Conjugatementioning

confidence: 99%

Energy and Charge Transfer in Nanoscale Hybrid Materials

Basché

Bottin

et al. 2015

Macromol. Rapid Commun.

Self Cite

View full text Add to dashboard Cite

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“…[3][4][5][6] In addition, high internal radiative efficiency holds promise for various photonic 7-10 and plasmonic applications. [14][15][16][17] The photo-curing patterning of nanocrystals shows fabrication resolutions larger than 2 μm and reduced luminescence intensity per unit volume compared to that of pristine QDs. These difficulties result in restricted usage and applications of QDs in diverse fields of photonics and plasmonics.…”

Section: Introductionmentioning

confidence: 99%

Patterning of colloidal quantum dots for the generation of surface plasmon

Park

Roh

Kim

et al. 2013

J. Micro/Nanolith. MEMS MOEMS

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Patterning of colloidal quantum dot (QD) of a nanometer resolution is important for potential applications in micro-or nanophotonics. Several patterning techniques such as polymer composites, molecular key-lock methods, inkjet printing, and the microcontact printing of QDs have been successfully developed and applied to various plasmonic applications. However, these methods are not easily adapted to conventional complementary metal-oxide semiconductor (CMOS)-compatible processes because of either limits in fabrication resolutions or difficulties in sub-100-nm alignment. Here, we present an adaptation of a conventional lift-off method for the patterning of colloidal QDs. This simple method can be later applied to CMOS processes by changing electron beam lithography to photolithography for building up photon-generation elements in various planar geometries. Various shapes formed by colloidal QD clusters such as straight lines, rings, and dot patterns with sub-100-nm size could be fabricated. The patterned structures show sub-10-nm positioning with good fluorescence properties and well-defined sidewall profiles. To demonstrate the applicability of our method, we present a surface plasmon generator from a QD cluster. Downloaded From: http://nanolithography.spiedigitallibrary.org/ on 05/18/2015 Terms of Use: http://spiedl.org/terms J. Micro/Nanolith. MEMS MOEMS 041202-4 Oct-Dec 2013/Vol. 12(4) Park et al.: Patterning of colloidal quantum dots for the generation of surface plasmon Downloaded From: http://nanolithography.spiedigitallibrary.org/ on 05/18/2015 Terms of Use: http://spiedl.org/terms

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“…To overcome those constraints, for example, researchers have developed methods of patterning mixture of photosensitive polymer and QDs. 14,15,16,17 However, this photo-curing patterning of nanocrystals suffers from fabrication resolution ( > 2 micron) and lower luminescence efficiency compared to that of pristine QDs. Another solution for patterning colloidal QDs is a microcontact printing using a polymer mold.…”

Section: Introductionmentioning

confidence: 99%

Nanoscale patterning of colloidal quantum dots for surface plasmon generation

et al. 2013

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The patterning of colloidal quantum dots with nanometer resolution is essential for their application in photonics and plasmonics. Several patterning approaches, such as the use of polymer composites, molecular lock-and-key methods, inkjet printing, and microcontact printing of quantum dots, have limits in fabrication resolution, positioning and the variation of structural shapes. Herein, we present an adaptation of a conventional liftoff method for patterning colloidal quantum dots. This simple method is easy and requires no complicated processes. Using this method, we formed straight lines, rings, and dot patterns of colloidal quantum dots on metallic substrates. Notably, patterned lines approximately 10 nm wide were fabricated. The patterned structures display high resolution, accurate positioning, and well-defined sidewall profiles. To demonstrate the applicability of our method, we present a surface plasmon generator elaborated from quantum dots.

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Robust Microstructures Using UV Photopatternable Semiconductor Nanocrystals

Cited by 65 publications

References 21 publications

Energy and Charge Transfer in Nanoscale Hybrid Materials

Energy and Charge Transfer in Nanoscale Hybrid Materials

Patterning of colloidal quantum dots for the generation of surface plasmon

Nanoscale patterning of colloidal quantum dots for surface plasmon generation

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