Fluxible Monodisperse Quantum Dots with Efficient Luminescence

Feng, Qisong; Dong, Lijie; Huang, Jing; Li, Qi; Fan, Yanhong; Xiong, Junlin; Xiong, Chuanxi

doi:10.1002/ange.201003051

Cited by 12 publications

(8 citation statements)

References 28 publications

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“…5 The high flexibility and compatibility of this synthetic strategy enables broad tunability of the hybrid systems with desired functionality for specific applications 4b,c. For instance, optimizing the chemical structure of the organic canopies can efficiently enhance gas absorption and selectivity towards CO 2 ;6a–c while selecting FePt or CdSe/CdS/ZnS nanoparticles as cores can create additional function in the nanofluids, such as magnetism and luminescence 6d,e. In this regard, it is highly desirable to fabricate porous liquids by the surface engineering of porous structures with liquid‐like polymeric canopies.…”

Section: Methodsmentioning

confidence: 99%

Porous Liquids: A Promising Class of Media for Gas Separation

et al. 2014

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A porous liquid containing empty cavities has been successfully fabricated by surface engineering of hollow structures with suitable corona and canopy species. By taking advantage of the liquid-like polymeric matrices as a separation medium and the empty cavities as gas transport pathway, this unique porous liquid can function as a promising candidate for gas separation. Moreover, such a facile synthetic strategy can be further extended to the fabrication of other types of nanostructure-based porous liquid, opening up new opportunities for preparation of porous liquids with attractive properties for specific tasks.

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Section: Methodsmentioning

confidence: 99%

Porous Liquids: A Promising Class of Media for Gas Separation

et al. 2014

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“…Such an unusual combination of liquid state with the tunable properties of nanoparticles makes NIMs a versatile material platform for diverse applications. Indeed, NIMs have been used as plasmonic material, battery electrolytes, luminescent material, and porous liquids for gas separation 5 – 9 .…”

Section: Introductionmentioning

confidence: 99%

Structure and Dynamics of Polymeric Canopies in Nanoscale Ionic Materials: An Electrical Double Layer Perspective

Zhou

Yang

Dai

et al. 2018

Sci Rep

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Nanoscale ionic materials (NIMs) are an emerging class of materials consisting of charged nanoparticles and polymeric canopies attaching to them dynamically by electrostatic interactions. Using molecular simulations, we examine the structure and dynamics of the polymeric canopies in model NIMs in which the canopy thickness is much smaller than the nanoparticle diameter. Without added electrolyte ions, the charged terminal groups of polymers adsorb strongly on charged walls, thereby electrostatically “grafting” polymers to the wall. These polymers are highly stretched. They rarely desorb from the wall, but maintain modest in-plane mobility. When electrolyte ion pairs are introduced, the counterions adsorb on the wall, causing some electrostatically “grafted” polymers to desorb. The desorbed polymers, however, are less than the adsorbed counter-ions, which leads to an overscreening of wall charges. The desorbed polymers’ charged terminal groups do not distribute uniformly across the canopy but are depleted in some regions; they adopt conformation similar to those in bulk and exchange with the “grafted” polymers rapidly, hence dilating the canopy and accelerating its dynamics. We understand these results by taking the canopy as an electrical double layer, and highlight the importance of the interplay of electrostatic and entropic effects in determining its structure and dynamics.

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“…In sharp contrast, the previous hybrid self-suspended NPs that flow exhibit liquid-like rheological behavior. [1][2][3][4][5][6][7][8][9][10] Both G' and G'' decrease with increasing temperature.…”

mentioning

confidence: 99%

“…The zero vapor pressure of self-suspended NPs eliminates the environmental concerns associated with using various solvents, and has attracted extensive research interests recently. Various hybrid self-suspended NPs have been synthesized from surface modification of the nanostructures, for example, SiO 2 , g-Fe 2 O 3 , [1,2] TiO 2 , [3] ZnO, [4] quantum dots, [5] gold, platinum, palladium, [6] CaCO 3 , [7] and carbon nanotubes. [8][9][10] The intrinsic electronic, magnetic, and luminescent properties of various nanostructures have made the self-suspended NPs a promising alternative to conducting lubricants, heat-transfer fluids, batteries, and printing electronics.…”

mentioning

confidence: 99%

Self‐Suspended Polyaniline Doped with a Protonic Acid Containing a Polyethylene Glycol Segment

Huang

Wang

et al. 2011

Chemistry An Asian Journal

Self Cite

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Self-suspended nanoparticles (NPs) are flowable at or near room temperature without the presence of any solvent. The zero vapor pressure of self-suspended NPs eliminates the environmental concerns associated with using various solvents, and has attracted extensive research interests recently. Various hybrid self-suspended NPs have been synthesized from surface modification of the nanostructures, for example, SiO 2 , g-Fe 2 O 3 , [1,2] TiO 2 , [3] ZnO, [4] quantum dots, [5] gold, platinum, palladium, [6] CaCO 3 , [7] and carbon nanotubes. [8][9][10] The intrinsic electronic, magnetic, and luminescent properties of various nanostructures have made the self-suspended NPs a promising alternative to conducting lubricants, heat-transfer fluids, batteries, and printing electronics. [2,4,11] Aside from the above mentioned self-suspended NPs and their corresponding liquid-like [1,2] behavior, herein we report a self-suspended polyaniline (PANI) that exhibits a unique thermoreversible gel-like rheological response. Owing to the intrinsic electrical properties of PANI, the self-suspended PANI might exhibit high electroconductivity, excellent electroluminescence, unique electrochromism, and outstanding processability, which could have widespread application in electrochromic devices, medical diagnostic transducers, lightweight batteries, electroluminescent devices, fuel cells, sensors, and actuators. [12][13][14][15][16][17][18] We anticipate that the technique reported here is also applicable to other polymers for exhibiting this unique structure and properties.The self-suspended PANI was prepared using a long-chain protonic acid containing a polyethylene glycol segment (CH 3 H) (NPES) as the dopant during the polymerization of the aniline monomers, and then removed the excess of NPES in the polymer solution through extensive dialysis. A dialysis experiment was carried out to investigate the removal of NPES, and the result indicates that all the unreacted NPES molecules can be extracted out of the dialysis bag (see the Supporting Information, Figure S1), which resulted in a solvent-free system. The doped PANI derivatives can self-assemble into nanofibrils. [19] By controlling the average doping ratio of the PANI molecule chain within a system, the PANI nanofibrils can further organize into micelles and exhibit unique thermoreversible gel-like rheology behavior. [20][21][22][23][24] Although such thermoreversible rheology behavior resembles those of previously reported thermoreversible gels, [25][26][27][28] the two categories are essentially different in that a real thermoreversible gel possesses a fibrillar network morphology. [27] The micelle morphology may originate from the nature of NPES which is quite different from those used in previously reported work involving sulfonic acid doped PANI; [25][26][27][28] for example, NPES contains a long flexible chain segment of polyethylene glycol. These NPES molecules with high flexibility significantly alter the assembly behavior of doped PANI and thus results in PANI derivative...

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Fluxible Monodisperse Quantum Dots with Efficient Luminescence

Cited by 12 publications

References 28 publications

Porous Liquids: A Promising Class of Media for Gas Separation

Porous Liquids: A Promising Class of Media for Gas Separation

Structure and Dynamics of Polymeric Canopies in Nanoscale Ionic Materials: An Electrical Double Layer Perspective

Self‐Suspended Polyaniline Doped with a Protonic Acid Containing a Polyethylene Glycol Segment

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