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Electrostatically Driven Vertical Combinatorial Patterning of Colloidal Nano-Objects. COLLOIDS AND INTERFACES 2023. [DOI: 10.3390/colloids7010006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The hierarchically directed assembly of multiple types of colloidal nano-objects on surfaces is of interest for developing disruptive applications combining their original properties. We propose herein a versatile, electrostatically driven strategy to arrange various kinds of colloids vertically in the shape of 3D micropatterns by nanoxerography. We made the proof of concept of this vertical combinatorial nano-object patterning using two types of photoluminescent CdSe(S)/CdZnS core/shell nanoplatelets emitting in the red and green wavelengths as model colloidal nanoparticles. The key experimental parameters were investigated to tune the thickness of each independent level of nanoplatelets within the vertical stack. We finally applied such a concept to make dual-colored nanoplatelet patterns. Interestingly, we proved numerically that the relatively high index of the nanoplatelet level is responsible for the partially directed emissions observed in photoluminescence experiments.
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2
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Drastic photostability improvement of silica particles impregnated with multiple emitting CdSe quantum dots prepared through efficient surface silanization. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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3
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Li F, Klepzig LF, Keppler N, Behrens P, Bigall NC, Menzel H, Lauth J. Layer-by-Layer Deposition of 2D CdSe/CdS Nanoplatelets and Polymers for Photoluminescent Composite Materials. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:11149-11159. [PMID: 36067458 DOI: 10.1021/acs.langmuir.2c00455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Two-dimensional (2D) semiconductor nanoplatelets (NPLs) are strongly photoluminescent materials with interesting properties for optoelectronics. Especially their narrow photoluminescence paired with a high quantum yield is promising for light emission applications with high color purity. However, retaining these features in solid-state thin films together with an efficient encapsulation of the NPLs is a challenge, especially when trying to achieve high-quality films with a defined optical density and low surface roughness. Here, we show photoluminescent polymer-encapsulated inorganic-organic nanocomposite coatings of 2D CdSe/CdS NPLs in poly(diallyldimethylammonium chloride) (PDDA) and poly(ethylenimine) (PEI), which are prepared by sequential layer-by-layer (LbL) deposition. The electrostatic interaction between the positively charged polyelectrolytes and aqueous phase-transferred NPLs with negatively charged surface ligands is used as a driving force to achieve self-assembled nanocomposite coatings with a well-controlled layer thickness and surface roughness. Increasing the repulsive forces between the NPLs by increasing the pH value of the dispersion leads to the formation of nanocomposites with all NPLs arranging flat on the substrate, while the surface roughness of the 165 nm (50 bilayers) thick coating decreases to Ra = 14 nm. The photoluminescence properties of the nanocomposites are determined by the atomic layer thickness of the NPLs and the 11-mercaptoundecanoic acid ligand used for their phase transfer. Both the full width at half-maximum (20.5 nm) and the position (548 nm) of the nanocomposite photoluminescence are retained in comparison to the colloidal CdSe/CdS NPLs in aqueous dispersion, while the measured photoluminescence quantum yield of 5% is competitive to state-of-the-art nanomaterial coatings. Our approach yields stable polymer-encapsulated CdSe/CdS NPLs in smooth coatings with controllable film thickness, rendering the LbL deposition technique a powerful tool for the fabrication of solid-state photoluminescent nanocomposites.
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Affiliation(s)
- Fuzhao Li
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering─Innovation Across Disciplines), 30167 Hannover, Germany
- Institute for Technical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Lars F Klepzig
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering─Innovation Across Disciplines), 30167 Hannover, Germany
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - Nils Keppler
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering─Innovation Across Disciplines), 30167 Hannover, Germany
- Institute of Inorganic Chemistry, Leibniz Universität Hannover, Callinstraße 9, 30167 Hannover, Germany
| | - Peter Behrens
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering─Innovation Across Disciplines), 30167 Hannover, Germany
- Institute of Inorganic Chemistry, Leibniz Universität Hannover, Callinstraße 9, 30167 Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Schneiderberg 39, 30167 Hannover, Germany
| | - Nadja C Bigall
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering─Innovation Across Disciplines), 30167 Hannover, Germany
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Schneiderberg 39, 30167 Hannover, Germany
| | - Henning Menzel
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering─Innovation Across Disciplines), 30167 Hannover, Germany
- Institute for Technical Chemistry, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Jannika Lauth
- Cluster of Excellence PhoenixD (Photonics, Optics, and Engineering─Innovation Across Disciplines), 30167 Hannover, Germany
- Institute of Physical Chemistry and Electrochemistry, Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
- Laboratory of Nano and Quantum Engineering, Schneiderberg 39, 30167 Hannover, Germany
- Institute of Physical and Theoretical Chemistry, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
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Liu W, Li Y, Li D, Chen L, Zhao J, Liu P, Sun XW, Wang G. On Cordelair-Greil Model about Electrophoretic Deposition. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107629. [PMID: 35615935 DOI: 10.1002/smll.202107629] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 05/04/2022] [Indexed: 06/15/2023]
Abstract
Electrophoretic deposition (EPD) is a facile technique to deposit quantum dots (QDs) films, which can be used as the color conversion layers for display applications. To better understand the EPD process, researchers have built many models of the EPD process. However, most of these models lack solid experimental support. Here, by adopting simple yet effective solvent engineering and well-designed experiments, this study proves the Cordelair-Greil model on EPD processes. Moreover, some supplements about this model are made according to practical experiments. The experimental verification of the Cordelair-Greil model is a solid step toward revealing the dynamics of the EPD process. Furthermore, the formation of cracks in EPD deposited QD films is prevented through solvent engineering. This work proves that besides modifying the intrinsic properties of QDs, solvent engineering is also a simple, effective, and low-cost way to study the EPD process and improve the QD film qualities deposited.
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Affiliation(s)
- Wenbo Liu
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P. R. China
- Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen, 518055, P. R. China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy, Materials and Devices, Shenzhen Key Lab for Advanced Quantum Dot Display and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Yifei Li
- Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen, 518055, P. R. China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy, Materials and Devices, Shenzhen Key Lab for Advanced Quantum Dot Display and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Depeng Li
- Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen, 518055, P. R. China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy, Materials and Devices, Shenzhen Key Lab for Advanced Quantum Dot Display and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Lixuan Chen
- Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen, 518055, P. R. China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy, Materials and Devices, Shenzhen Key Lab for Advanced Quantum Dot Display and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Jinyang Zhao
- Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen, 518055, P. R. China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy, Materials and Devices, Shenzhen Key Lab for Advanced Quantum Dot Display and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Pai Liu
- Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen, 518055, P. R. China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy, Materials and Devices, Shenzhen Key Lab for Advanced Quantum Dot Display and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Xiao Wei Sun
- Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen, 518055, P. R. China
- Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy, Materials and Devices, Shenzhen Key Lab for Advanced Quantum Dot Display and Lighting, and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, 518055, P. R. China
| | - Guoping Wang
- Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen, 518060, P. R. China
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Improved photostability of silica bead impregnated with CdSe-based quantum dots prepared through proper surface silanization. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124811] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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6
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Liu X, Han J, Wu W, Shi Q, Li W, Li C. Highly Luminescent Glass Films Incorporating Hydrophobic Quantum Dots Prepared by Layer-by-layer Self-assembly Method. CHEM LETT 2016. [DOI: 10.1246/cl.150870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaohui Liu
- School of Materials Science and Engineering, Tianjin University of Technology
| | - Jing Han
- School of Materials Science and Engineering, Tianjin University of Technology
| | - Weina Wu
- School of Materials Science and Engineering, Tianjin University of Technology
| | - Qian Shi
- School of Materials Science and Engineering, Tianjin University of Technology
| | - Wei Li
- College of Chemistry and Chemical Engineering, Tianjin University of Technology
| | - Chunliang Li
- School of Materials Science and Engineering, Tianjin University of Technology
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7
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de Souza GCS, Ribeiro DSM, Rodrigues SSM, Paim APS, Lavorante AF, da Silva VL, Santos JLM, Araújo AN, Montenegro MCBSM. Clean photoinduced generation of free reactive oxygen species by silica films embedded with CdTe–MTA quantum dots. RSC Adv 2016. [DOI: 10.1039/c5ra23133g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
QDs immobilized into silica films were obtained by sol–gel technique using TMOS. These nanomaterials kept their native PL and the ability to generate ROS opening perspectives for the development of more environment friendly analytical application.
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Affiliation(s)
| | | | | | - Ana Paula S. Paim
- Dep. Química Fundamental
- Univ. Federal Pernambuco
- 50740-560 Recife
- Brasil
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8
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Rengers C, Voitekhovich SV, Kittler S, Wolf A, Adam M, Gaponik N, Kaskel S, Eychmüller A. 3D assembly of silica encapsulated semiconductor nanocrystals. NANOSCALE 2015; 7:12713-12721. [PMID: 26154738 DOI: 10.1039/c5nr01880c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Non-ordered porous networks, so-called aerogels, can be achieved by the 3D assembly of quantum dots (QDs). These materials are well suited for photonic applications, however a certain quenching of the photoluminescence (PL) intensity is observed in these structures. This PL quenching is mainly attributed to the energy transfer mechanisms that result from the close contact of the nanoparticles in the network. Here, we demonstrate the formation of a novel aerogel material with non-quenching PL behaviour by non-classical, reversible gel formation from tetrazole capped silica encapsulated QDs. Monitoring of the gelation/degelation by optical spectroscopy showed that the optical properties of the nanocrystals could be preserved in the 3D network since no spectral shifts and lifetime shortening, which can be attributed to the coupling between QDs, are observed in the gels as compared to the original colloidal solutions. In comparison with other QD-silica monoliths, QDs in our gels are homogeneously distributed with a distinct and controllable distance. In addition we show that the silica shell is porous and allows metal ions to pass through the shell and interact with the QD core causing detectable changes of the emission properties. We further show the applicability of this gelation method to other QD materials which sets the stage for facile preparation of a variety of mixed gel structures.
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9
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Du Y, Yang P, Chen HS, Che Q, Liu Y, He H, Miao Y, Zhao J. Preparation and properties of highly stable quantum dot-based flexible silica films. RSC Adv 2014. [DOI: 10.1039/c4ra08770d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
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10
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Yang P, Chen HS, Wang J, Che Q, Ma Q, Cao Y, Zhu Y. Magic sol–gel silica films encapsulating hydrophobic and hydrophilic quantum dots for white-light-emission. RSC Adv 2014. [DOI: 10.1039/c4ra01739k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A sol–gel silica film was fabricated by a spraying approach on various substrates with a 3-dimensional surface for white LEDs.
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Affiliation(s)
- Ping Yang
- School of Material Science and Engineering
- University of Jinan
- Jinan, P.R. China
| | - Hsueh-Shin Chen
- Department of Materials Science and Engineering
- National Tsing Hua University
- Hsinchu 300, Taiwan
| | - Junpeng Wang
- School of Material Science and Engineering
- University of Jinan
- Jinan, P.R. China
| | - Quande Che
- School of Material Science and Engineering
- University of Jinan
- Jinan, P.R. China
| | - Qian Ma
- School of Material Science and Engineering
- University of Jinan
- Jinan, P.R. China
| | - Yongqiang Cao
- School of Material Science and Engineering
- University of Jinan
- Jinan, P.R. China
| | - Yuanna Zhu
- School of Material Science and Engineering
- University of Jinan
- Jinan, P.R. China
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11
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Jun S, Lee J, Jang E. Highly luminescent and photostable quantum dot-silica monolith and its application to light-emitting diodes. ACS NANO 2013; 7:1472-7. [PMID: 23363407 DOI: 10.1021/nn3052428] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A highly luminescent and photostable quantum dot-silica monolith (QD-SM) substance was prepared by preliminary surface exchange of the QDs and base-catalyzed sol-gel condensation of silica. The SM was heavily doped with 6-mercaptohexanol exchanged QDs up to 12 vol % (26 wt %) without particle aggregation. Propylamine catalyst was important in maintaining the original luminescence of the QDs in the SM during sol-gel condensation. The silica layer was a good barrier against oxygen and moisture, so that the QD-SM maintained its initial luminescence after high-power UV radiation (∼1 W) for 200 h and through the 150 °C LED encapsulant curing process. Green and red light-emitting QD-SMs were applied as color-converting layers on blue LEDs, and the external quantum efficiency reached up to 89% for the green QD-SM and 63% for the red one. A white LED made with a mixture of green and red QDs in the SM, in which the color coordinate was adjusted at (0.23, 0.21) in CIE1931 color space for a backlight application, showed an efficacy of 47 lm/W, the highest value yet reported.
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Affiliation(s)
- Shinae Jun
- Advanced Material Research Center, Samsung Advanced Institute of Technology, Samsung Electronics Co. Mt.14-1, Nongseo-Dong, Giheung-Gu, Yongin-Si, Gyeonggi-Do 449-712, Korea
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12
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Liu M, Zhao H, Chen S, Wang H, Quan X. Photochemical synthesis of highly fluorescent CdTe quantum dots for “on–off–on” detection of Cu(II) ions. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.01.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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13
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Fabrication of CdTe Quantum Dots Self-assembled Multilayers and Interfacial Sensing for Lysozyme. CHINESE JOURNAL OF ANALYTICAL CHEMISTRY 2012. [DOI: 10.3724/sp.j.1096.2011.01336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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14
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Xie Z, Wang F, Liu CY. Organic-inorganic hybrid functional carbon dot gel glasses. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:1716-21. [PMID: 22396335 DOI: 10.1002/adma.201104962] [Citation(s) in RCA: 125] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Indexed: 05/22/2023]
Abstract
Silane pre-functionalized carbon dots, arbitrarily doped (0-100% scale) carbon dot nanohybrid gel glasses and macrostructures with high luminescence (quantum yields = 47% and 88%, respectively) and broadband optical limiting properties (532 and 1064 nm) are reported. These glasses are optically, thermally, and mechanically stable, as well as highly transmissive (ca. 90%) in the 400-1350 nm region.
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Affiliation(s)
- Zheng Xie
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, PR China
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15
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Yan M, Ge S, Gao W, Chu C, Yu J, Song X. Fluorescence immunosensor based on p-acid-encapsulated silica nanoparticles for tumor marker detection. Analyst 2012; 137:2834-9. [DOI: 10.1039/c2an35153f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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16
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Sekiguchi S, Niikura K, Iyo N, Matsuo Y, Eguchi A, Nakabayashi T, Ohta N, Ijiro K. pH-dependent network formation of quantum dots and fluorescent quenching by Au nanoparticle embedding. ACS APPLIED MATERIALS & INTERFACES 2011; 3:4169-4173. [PMID: 21970588 DOI: 10.1021/am201013n] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A simple approach to the creation of colloidal assemblies is in high demand for the development of functional devices. Here, we present the preparation of CdTe-QD (quantum dot) networks in as little as 1 day simply by pH modification without the use of oxidants. The QD network was tractable in water and casting from a droplet produced a porous networked film on both hydrophobic and hydrophilic solid substrates. Further, we found that citrate-protected gold nanoparticles (AuNPs, d = 5 nm) could be incorporated into the QD networks to afford a QD/Au composite network, and that the fluorescence from the QDs was largely decreased by the addition of a small proportion of AuNPs (QD:AuNP = 99.4:0.6), probably due to the efficient charge transfer through the network. These data indicate that our method is suitable for application to the creation of metal/QD hybrid materials that can be integrated into wet-based processes.
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17
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Chen X, Liu F, Jiang Q, Sun L, Wang Q. Synthesis and Properties of Water-Soluble Silica-Coated ZnSe/ZnS Semiconductor Quantum Dots. J Inorg Organomet Polym Mater 2011. [DOI: 10.1007/s10904-011-9606-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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18
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Controlled self-assembly of hydrophobic quantum dots through silanization. J Colloid Interface Sci 2011; 361:9-15. [DOI: 10.1016/j.jcis.2011.05.056] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2010] [Revised: 05/15/2011] [Accepted: 05/17/2011] [Indexed: 11/20/2022]
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19
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Hybrid SiO2-coated nanocrystal-based heterostructures: Assembly, morphology transition, and photoluminescence at room temperature. Colloids Surf A Physicochem Eng Asp 2011. [DOI: 10.1016/j.colsurfa.2011.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Generalova AN, Oleinikov VA, Zarifullina MM, Lankina EV, Sizova SV, Artemyev MV, Zubov VP. Optical sensing quantum dot-labeled polyacrolein particles prepared by layer-by-layer deposition technique. J Colloid Interface Sci 2011; 357:265-72. [DOI: 10.1016/j.jcis.2011.02.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 12/13/2010] [Accepted: 02/01/2011] [Indexed: 10/18/2022]
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21
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Yang F, Ma Q, Yu W, Su X. Naked-eye colorimetric analysis of Hg2+ with bi-color CdTe quantum dots multilayer films. Talanta 2011; 84:411-5. [DOI: 10.1016/j.talanta.2011.01.054] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 01/05/2011] [Accepted: 01/16/2011] [Indexed: 10/18/2022]
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22
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An electrochemiluminescence sensor for determination of durabolin based on CdTe QD films by layer-by-layer self-assembly. Anal Bioanal Chem 2011; 400:807-14. [DOI: 10.1007/s00216-011-4808-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2010] [Revised: 02/12/2011] [Accepted: 02/13/2011] [Indexed: 11/24/2022]
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23
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Yang P, Ando M, Murase N. Highly luminescent SiO2 beads with multiple QDs: Preparation conditions and size distributions. J Colloid Interface Sci 2011; 354:455-60. [DOI: 10.1016/j.jcis.2010.11.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Revised: 11/06/2010] [Accepted: 11/09/2010] [Indexed: 10/18/2022]
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24
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Yang P, Yuan Z, Yang J, Zhang A, Cao Y, Jiang Q, Shi R, Liu F, Cheng X. Science as art: self-assembly of hybrid SiO2-coated nanocrystals. CrystEngComm 2011. [DOI: 10.1039/c0ce00350f] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Darbandi M, Urban G, Krüger M. A facile synthesis method to silica coated CdSe/ZnS nanocomposites with tuneable size and optical properties. J Colloid Interface Sci 2010; 351:30-4. [DOI: 10.1016/j.jcis.2010.07.043] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Revised: 06/18/2010] [Accepted: 07/17/2010] [Indexed: 10/19/2022]
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26
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Chen Q, Fung Y. Capillary electrophoresis with immobilized quantum dot fluorescence detection for rapid determination of organophosphorus pesticides in vegetables. Electrophoresis 2010; 31:3107-14. [DOI: 10.1002/elps.201000260] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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27
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Blue-emitting small silica particles incorporating ZnSe-based nanocrystals prepared by reverse micelle method. J Biomed Biotechnol 2010; 2007:52971. [PMID: 18350119 PMCID: PMC2266811 DOI: 10.1155/2007/52971] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2007] [Revised: 12/17/2007] [Accepted: 12/24/2007] [Indexed: 11/24/2022] Open
Abstract
ZnSe-based nanocrystals (ca. 4-5 nm in diameter) emitting in blue region (ca. 445 nm) were incorporated in spherical small silica particles (20–40 nm in diameter) by a reverse micelle method. During the preparation, alkaline solution was used to deposit the hydrolyzed alkoxide on the surface of nanocrystals. It was crucially important for this solution to include
Zn2+ ions and surfactant molecules (thioglycolic acid) to preserve the spectral properties of the final silica particles. This is because these substances in the solution prevent the surface of nanocrystals from deterioration by dissolution during processing. The resultant silica particles have an emission efficiency of 16% with maintaining the photoluminescent spectral width and peak wavelength of the initial colloidal solution.
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28
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Yang P, Murase N. Size-Tunable Highly Luminescent SiO2Particles Impregnated with Number-Adjusted CdTe Nanocrystals. Chemphyschem 2010; 11:815-21. [DOI: 10.1002/cphc.200900850] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Ma Q, Cui H, Su X. Highly sensitive gaseous formaldehyde sensor with CdTe quantum dots multilayer films. Biosens Bioelectron 2009; 25:839-44. [DOI: 10.1016/j.bios.2009.08.038] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2009] [Revised: 08/08/2009] [Accepted: 08/26/2009] [Indexed: 11/17/2022]
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30
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Luan Q, Li J, Yao X. Fabrication of Fe(CN)63−Functionalized PDDA/CdTe Layer-by-layer Film with Good Electron Transfer Ability. ELECTROANAL 2009. [DOI: 10.1002/elan.200904603] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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31
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Yang P, Mouse N. Preparation and photoluminescence of SiO2-CdTe multilayer film by layer-by-layer self-assembly. ACTA ACUST UNITED AC 2009. [DOI: 10.1088/1742-6596/152/1/012009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Lee S, Lee B, Kim BJ, Park J, Yoo M, Bae WK, Char K, Hawker CJ, Bang J, Cho J. Free-Standing Nanocomposite Multilayers with Various Length Scales, Adjustable Internal Structures, and Functionalities. J Am Chem Soc 2009; 131:2579-87. [DOI: 10.1021/ja8064478] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Seryun Lee
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Bokyoung Lee
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Bumjoon J. Kim
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Junwoo Park
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Misang Yoo
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Wan Ki Bae
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Kookheon Char
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Craig J. Hawker
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Joona Bang
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
| | - Jinhan Cho
- School of Advanced Materials Engineering, Kookmin University, Jeongneung-dong, Seongbuk-gu, Seoul 136-702, Korea, Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea, Department of Chemical and Biological Engineering, Korea University, Anam-dong, Seongbuk-gu, Seoul 136-701, Korea, School of Chemical and Biological Engineering, Seoul National University, San 56-1, Shinlim-dong, Kwanak-gu, Seoul 151-744, Korea, and Materials
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Watanabe S, Shibata H, Sakamoto F, Azumi R, Sakai H, Abe M, Matsumoto M. Directed self-assembly of gold nanoparticles and gold thin films on micro- and nanopatterned templates fabricated from mixed phase-separated Langmuir-Blodgett films. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b905963f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhou L, Gao C, Xu W. Amphibious polymer-functionalized CdTe quantum dots: Synthesis, thermo-responsive self-assembly, and photoluminescent properties. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b905966k] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tsuruoka T, Takahashi R, Nakamura T, Fujii M, Akamatsu K, Nawafune H. Highly luminescent mono- and multilayers of immobilized CdTe nanocrystals: controlling optical properties through post chemical surface modification. Chem Commun (Camb) 2008:1641-3. [DOI: 10.1039/b717732a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Zimnitsky D, Jiang C, Xu J, Lin Z, Zhang L, Tsukruk VV. Photoluminescence of a freely suspended monolayer of quantum dots encapsulated into layer-by-layer films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:10176-83. [PMID: 17725371 DOI: 10.1021/la7014644] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
A single monolayer of CdSe/ZnS quantum dots (QDs) has been encapsulated into a 60 nm free-suspended layer-by-layer (LbL) film. The QD monolayer showed a low light-emission within this film in contact with supporting solid substrates, but the manifold increase of photoluminescencence intensity was observed when the film was lifted and freely suspended over the microfabricated cylindrical cavities. This phenomenon was discussed in relationship with the effect of the elimination of the surface quenching enhanced by optical reflection from highly reflective silicon cavities. We suggest that a significant increase of the photoluminescence intensity of QD monolayers suspended over the microfabricated array can be interesting for future diagnostic and sensing applications.
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Affiliation(s)
- Dmitry Zimnitsky
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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37
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Ariga K, Hill JP, Ji Q. Layer-by-layer assembly as a versatile bottom-up nanofabrication technique for exploratory research and realistic application. Phys Chem Chem Phys 2007; 9:2319-40. [PMID: 17492095 DOI: 10.1039/b700410a] [Citation(s) in RCA: 717] [Impact Index Per Article: 42.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The layer-by-layer (LbL) adsorption technique offers an easy and inexpensive process for multilayer formation and allows a variety of materials to be incorporated within the film structures. Therefore, the LbL assembly method can be regarded as a versatile bottom-up nanofabrication technique. Research fields concerned with LbL assembly have developed rapidly but some important physicochemical aspects remain uninvestigated. In this review, we will introduce several examples from physicochemical investigations regarding the basics of this method to advanced research aimed at practical applications. These are selected mostly from recent reports and should stimulate many physical chemists and chemical physicists in the further development of LbL assembly. In order to further understand the mechanism of the LbL assembly process, theoretical work, including thermodynamics calculations, has been conducted. Additionally, the use of molecular dynamics simulation has been proposed. Recently, many kinds of physicochemical molecular interactions, including hydrogen bonding, charge transfer interactions, and stereo-complex formation, have been used. The combination of the LbL method with other fabrication techniques such as spin-coating, spraying, and photolithography has also been extensively researched. These improvements have enabled preparation of LbL films composed of various materials contained in well-designed nanostructures. The resulting structures can be used to investigate basic physicochemical phenomena where relative distances between interacting groups is of great importance. Similarly, LbL structures prepared by such advanced techniques are used widely for development of functional systems for physical applications from photovoltaic devices and field effect transistors to biochemical applications including nano-sized reactors and drug delivery systems.
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Affiliation(s)
- Katsuhiko Ariga
- Supermolecules Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Japan.
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38
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Tse CW, Leung YH, Tam KH, Chan WK, Djurisić AB. Tailoring and modifications of a ZnO nanostructure surface by the layer-by-layer deposition technique. NANOTECHNOLOGY 2006; 17:3563-3568. [PMID: 19661605 DOI: 10.1088/0957-4484/17/14/034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Different ZnO nanostructures have been modified using the layer-by-layer polyelectrolyte deposition process. The polymer multilayers were deposited on free standing ZnO tetrapods, ZnO tetrapods on a substrate and ZnO nanorod arrays. In addition, attachment of metallic (Au) nanoparticles to the ZnO nanostructure surface using layer-by-layer deposition was demonstrated. The properties of the ZnO nanostructures with modified surfaces were investigated by electron microscopy, absorption and photoluminescence measurements. A linear increase in polymer thickness with the number of polymer multilayers was confirmed by absorption and transmission electron microscopy. The technique can be readily extended to different nanoparticles and different morphologies of ZnO.
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Affiliation(s)
- Chui Wan Tse
- Department of Chemistry, The Univeristy of Hong Kong, Pokfulam Road, Hong Kong
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Graf C, Dembski S, Hofmann A, Rühl E. A general method for the controlled embedding of nanoparticles in silica colloids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:5604-10. [PMID: 16768483 DOI: 10.1021/la060136w] [Citation(s) in RCA: 88] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A novel method for the controlled embedding of multiple nanoparticles of various materials, such as gold nanoparticles, quantum dots, and magnetic nanoparticles, in silica colloids is presented. After adsorption of the amphiphilic polymer poly(vinylpyrrolidone) on hydrophobic or hydrophilic stabilized nanoparticles, these are adsorbed on silica spheres and covered by variable-thickness silica shells. This silica coating protects the embedded nanoparticles against chemical transformations, which is of crucial importance for the biocompatibility of particles containing toxic elements. Moreover, it is found that the optical properties of the nanoparticles are retained. Possible applications of multicore particles are briefly discussed.
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Affiliation(s)
- Christina Graf
- Institut für Physikalische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany.
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Darbandi M, Lu W, Fang J, Nann T. Silica encapsulation of hydrophobically ligated PbSe nanocrystals. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:4371-5. [PMID: 16618189 DOI: 10.1021/la0529658] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Spherical PbSe@SiO2 nanoparticles have been successfully synthesized within reverse micelles via metal alkoxide hydrolysis and condensation within a microemulsion system. These core-shell nanoparticles were characterized by transmission electron microscopy (TEM), NIR absorption spectroscopy, energy-dispersive X-ray analysis, and TEM electron diffractions. It shows that the obtained core-shell structures have a spherical shape with narrow size distribution (average size approximately 35 nm) and smooth surfaces. The size of the particles and the thickness of the shells can be controlled by manipulating the relative rates of the hydrolysis and condensation reactions of tetraethoxysilane (TEOS) within the microemulsion.
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Affiliation(s)
- Masih Darbandi
- Freiburg Materials Research Center, Stefan-Meier-Strasse 21, Albert-Ludwig University Freiburg, D-79104, Freiburg, Germany
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