Confined Growth of Quantum Dots in Silica Spheres by Ion Exchange of “Trapped NH4+” for White-Light Emission

Xing, Mingyang; Chen, Bingkun; Feng, Ji; Xu, Wenjing; Bai, Yaocai; Zhou, Yi; Dong, Chunyang; Zhong, Haizheng; Zhang, Jinlong; Yin, Yadong

doi:10.1016/j.chempr.2019.06.010

Cited by 27 publications

(18 citation statements)

References 56 publications

(64 reference statements)

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“…Particularly, Chang et al. proposed a strategy of introducing periodic arrays of nanopores on the GNRs, and found that the maximum achievable ZT is 2 at room temperature when the device length was 1.2 μm . Hossain et al.…”

Section: Introductionmentioning

confidence: 99%

“…To reduce the thermal conductivity and to improvet he ZT value further,t here have been many theoretical investigations carried out with different analytical strategies on the GNRs: Antidotl attices, [22] edge disorders, [23] edge passivation, [24] mechanical strain, [25] nanopore GNRs, [26] etc. Particularly,C hang et al proposed a strategy of introducing periodic arrays of nanopores [27] on the GNRs,a nd found that the maximum achievable ZT is 2a tr oom temperature when the device length was 1.2 mm. [28] Hossain et al have predicted that the GNRs with pores show higher ZT value than the GNRs without pores, when the dimension was same in both the cases.…”

Section: Introductionmentioning

confidence: 99%

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Bottom‐Up On‐Surface Synthesis of Two‐Dimensional Graphene Nanoribbon Networks and Their Thermoelectric Properties

Kojima

Nakae

et al. 2019

Chemistry An Asian Journal

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Graphene, the one‐atom‐thick two‐dimensional (2D) carbon material, has attracted tremendous interest in both academia and industry due to its outstanding electrical, mechanical, and thermal properties. For electronic applications, the challenging task is to make it as a semiconductor. The bottom‐up synthesis of semiconducting one‐dimensional (1D) nanometer‐wide graphene strips, namely, graphene nanoribbons (GNRs), has attracted much attention owing to its promising electronic, optical, and magnetic properties. In this regard, we report the fabrication of cove‐type 2D GNR networks (GNNs) via the interconnection of 1D self‐assembled GNRs on the surface of Au(111). The cove‐type 2D GNRs networks (GNNs) were fabricated from the GNR, 5‐CGNR‐1‐1, synthesized using the precursor of DBSP. Annealing of high‐density self‐assembled GNRs on the surface of Au(111) through two‐zone chemical vapour deposition (2Z CVD) successfully generated a 2D interconnected structure with high yield via the fusion and ladder coupling reactions of GNR chains. In order to validate the later fusion reaction, we have also synthesized the GNR, 7‐AGNR‐1‐1, using the precursor of DBBA. The GNNs, which consist of hybridized metallic‐like and semiconducting GNRs, are a new class of carbon‐based materials. Further, we applied this material for thermoelectric (TE) applications and found a very low cross‐plane thermal conductivity of 0.11 Wm−1 K−1, which is one of the lowest value among the carbon‐based materials as well as inorganic semiconductors, while maintaining the cross‐plane electrical conductivity of 188 S m−1.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bottom‐Up On‐Surface Synthesis of Two‐Dimensional Graphene Nanoribbon Networks and Their Thermoelectric Properties

Kojima

Nakae

et al. 2019

Chemistry An Asian Journal

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“…We observed an inhomogeneous growth of Ag in the templates, which was largely ascribed to the strong coordination between Ag + and the trapped NH 4 + and the slow diffusion of Ag + through the resorcinol‐formaldehyde (RF) resin shells. [ 28 ] If RF shells are etched by NaOH, the fast Ag + diffusion produces multiple large Ag grains (Figure S3, Supporting Information). This comparison underpins the important role of RF shells in regulating the growing kinetics: the slow diffusion of Ag + from the reaction solution to the inner gap retards the Ag growth, prolongs the Ostwald ripening process, and is responsible for the growth of Ag on limited seeds into high‐quality rods (Figure S4, Supporting Information).…”

Section: Figurementioning

confidence: 99%

Polarization‐Modulated Multidirectional Photothermal Actuators

Han

Fan

et al. 2020

Advanced Materials

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Photothermal actuators have attracted increasing attention due to their ability to convert light energy into mechanical deformation and locomotion. This work reports a freestanding, multidirectional photothermal robot that can walk along a predesigned pathway by modulating laser polarization and on–off switching. Magnetic–plasmonic hybrid Fe3O4/Ag nanorods are synthesized using an unconventional templating approach. The coupled magnetic and plasmonic anisotropy allows control of the rod orientation, plasmonic excitation, and photothermal conversion by simply applying a magnetic field. Once the rods are fixed with desirable orientations in a bimorph actuator by magnetic‐field‐assisted lithography, the bending of the actuator can be controlled by switching the laser polarization. A bipedal robot is created by coupling the rod orientation with the alternating actuation of its two legs. Irradiating the robot by a laser with alternating or fixed polarization synergistically results in basic movement (backward and forward) and turning (including left‐, right‐, and U‐turn), respectively. A complex walk along predesigned pathways can be potentially programmed by combining the movement and turning modes of the robots. This strategy provides an alternative driving mechanism for preparing functional soft robots, thus breaking through the limitations in the existing systems in terms of light sources and actuation manners.

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“…Perovskite quantum dots (PQDs) have attracted great scientific and technological interest and become one of the most popular nanomaterials because of their widely potentials in light-emitting diodes (LEDs), solar cells and other optoelectronic devices [1][2][3][4]. Compared with traditional semiconductor quantum dots, PQDs have advantages of low cost, high color purity, and nearly 100% photoluminescence quantum yield (PLQY) [5][6][7][8][9][10][11][12]. To implement their practical applications, plenty of methods have been proposed to fabricate PQDs, such as template synthesis, ligand-assisted reprecipitation, hot injection, and wet ball-milling [13].…”

Section: Introductionmentioning

confidence: 99%

Microfluidic generation of barcodes with in situ synthesized perovskite quantum dot encapsulation

et al. 2021

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Perovskite quantum dots (PQDs) are new class of optoelectronic materials, which have been widely studied for their extraordinary physical properties. Attempts to develop these materials are tending to make their fabrication much controllable and extend their values in different areas. Here, we present a novel strategy for one-step in situ synthesis of PQD-encapsulated barcode particles with the assistance of microfluidic technique. By changing the halide ratio in perovskite precursor solutions that emulsified in microfluidic devices, a series of PQDs with different colors have been successfully fabricated, which made them ideal materials as barcodes. Because of the stable encapsulation of ethyleneglycol dimethacrylate (EGDMA) resin, the PQD-encapsulated barcode particles were with no cytotoxicity and could be anti-quenched. It was demonstrated for the first time that the PQD-encapsutated barcode particles by microfluidics were valuable for multiplex biomolecular encoding and assays. These features indicate that the PQD-encapsutated barcode particles by microfluidics are ideal for many practical applications and have a broad prospect in biomedical field.

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Confined Growth of Quantum Dots in Silica Spheres by Ion Exchange of “Trapped NH4+” for White-Light Emission

Cited by 27 publications

References 56 publications

Bottom‐Up On‐Surface Synthesis of Two‐Dimensional Graphene Nanoribbon Networks and Their Thermoelectric Properties

Bottom‐Up On‐Surface Synthesis of Two‐Dimensional Graphene Nanoribbon Networks and Their Thermoelectric Properties

Polarization‐Modulated Multidirectional Photothermal Actuators

Microfluidic generation of barcodes with in situ synthesized perovskite quantum dot encapsulation

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