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Kelm JE, Dempsey JL. Metal-Dictated Reactivity of Z-Type Ligands to Passivate Surface Defects on CdSe Nanocrystals. J Am Chem Soc 2024; 146:5252-5262. [PMID: 38373282 DOI: 10.1021/jacs.3c11811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Accessing semiconductor nanocrystals free from surface defects is an outstanding challenge in the design of materials with targeted properties. Despite the established importance of Z-type ligand surface passivation to eliminate defects, the optical and electronic properties of nanocrystals vary depending on the nanocrystal composition and Z-type ligand identity. In this work, a series of Cd-, Zn-, and Pb-based non-native Z-type ligands with the formula MX2 (X = undecylenate or chloride) were employed to elucidate Z-type ligand characteristics that result in surface passivation of undercoordinated surface ions to eliminate trap states from CdSe nanocrystals. First, CdSe nanocrystals were reacted with N,N,N',N'-tetramethylethylene-1,2-diamine (TMEDA) to remove native Cd(oleate)2 Z-type ligands from the surface, resulting in undercoordinated surface chalcogen ions. After subsequent reaction with M(UDA)2, ligands bound to the surface were quantified by NMR spectroscopy, and in parallel, the impact of Z-type ligands on the nanocrystal optical properties was monitored using photoluminescence spectroscopy. We find that Cd- and Zn-based Z-type ligands exhibit similar reactivity with the nanocrystal surface via NMR spectroscopy, yet Cd(UDA)2 passivation results in an 800% PL increase while Zn(UDA)2 passivation yields a 13% increase in photoluminescence intensity. Nanocrystals reacted with Pb-based Z-type ligands have lower surface coverage, as quantified by NMR spectroscopy, and lead to only a marginal increase of nanocrystal photoluminescence intensity (60%). These data indicate that the metal identity of the Z-type ligand has a profound impact on the reactivity and resulting electronic structure of the postsynthetically modified nanocrystal. This work provides a framework for achieving defect-free CdSe nanocrystals.
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Affiliation(s)
- Jennica E Kelm
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, United States
| | - Jillian L Dempsey
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599-3290, United States
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2
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Mandal T, Mishra SR, Singh V. Comprehensive advances in the synthesis, fluorescence mechanism and multifunctional applications of red-emitting carbon nanomaterials. NANOSCALE ADVANCES 2023; 5:5717-5765. [PMID: 37881704 PMCID: PMC10597556 DOI: 10.1039/d3na00447c] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 09/12/2023] [Indexed: 10/27/2023]
Abstract
Red emitting fluorescent carbon nanomaterials have drawn significant scientific interest in recent years due to their high quantum yield, water-dispersibility, photostability, biocompatibility, ease of surface functionalization, low cost and eco-friendliness. The red emissive characteristics of fluorescent carbon nanomaterials generally depend on the carbon source, reaction time, synthetic approach/methodology, surface functional groups, average size, and other reaction environments, which directly or indirectly help to achieve red emission. The importance of several factors to achieve red fluorescent carbon nanomaterials is highlighted in this review. Numerous plausible theories have been explained in detail to understand the origin of red fluorescence and tunable emission in these carbon-based nanostructures. The above advantages and fluorescence in the red region make them a potential candidate for multifunctional applications in various current fields. Therefore, this review focused on the recent advances in the synthesis approach, mechanism of fluorescence, and electronic and optical properties of red-emitting fluorescent carbon nanomaterials. This review also explains the several innovative applications of red-emitting fluorescent carbon nanomaterials such as biomedicine, light-emitting devices, sensing, photocatalysis, energy, anticounterfeiting, fluorescent silk, artificial photosynthesis, etc. It is hoped that by choosing appropriate methods, the present review can inspire and guide future research on the design of red emissive fluorescent carbon nanomaterials for potential advancements in multifunctional applications.
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Affiliation(s)
- Tuhin Mandal
- Environment Emission and CRM Section, CSIR-Central Institute of Mining and Fuel Research Dhanbad Jharkhand 828108 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Shiv Rag Mishra
- Environment Emission and CRM Section, CSIR-Central Institute of Mining and Fuel Research Dhanbad Jharkhand 828108 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
| | - Vikram Singh
- Environment Emission and CRM Section, CSIR-Central Institute of Mining and Fuel Research Dhanbad Jharkhand 828108 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201 002 India
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3
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Copper indium sulfide quantum dots in photocatalysis. J Colloid Interface Sci 2023; 638:193-219. [PMID: 36738544 DOI: 10.1016/j.jcis.2023.01.107] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/17/2023] [Accepted: 01/22/2023] [Indexed: 01/27/2023]
Abstract
Since the advent of photocatalytic technology, scientists have been searching for semiconductor materials with high efficiency in solar energy utilization and conversion to chemical energy. Recently, the development of quantum dot (QD) photocatalysts has attracted much attention because of their unique characteristics: small size, quantum effects, strong surface activity, and wide photoresponse range. Among ternary chalcogenide semiconductors, CuInS2 QDs are increasingly examined in the field of photocatalysis due to their high absorption coefficients, good matching of the absorption range with sunlight spectrum, long lifetimes of photogenerated electron-hole pairs and environmental sustainability. In this review paper, the structural and electronic properties, synthesis methods and various photocatalytic applications of CuInS2 QDs are systematically expounded. The current research status on the photocatalytic properties of materials based on CuInS2 QD is discussed combined with the existing modification approaches for the enhancement of their performances. Future challenges and new development opportunities of CuInS2 QDs in the field of photocatalysis are then prospected.
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4
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Quinson J, Kunz S, Arenz M. Surfactant-Free Colloidal Syntheses of Precious Metal Nanoparticles for Improved Catalysts. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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5
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Van den Eynden D, Pokratath R, Mathew JP, Goossens E, De Buysser K, De Roo J. Fatty acid capped, metal oxo clusters as the smallest conceivable nanocrystal prototypes. Chem Sci 2023; 14:573-585. [PMID: 36741516 PMCID: PMC9847641 DOI: 10.1039/d2sc05037d] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 11/26/2022] [Indexed: 12/14/2022] Open
Abstract
Metal oxo clusters of the type M6O4(OH)4(OOCR)12 (M = Zr or Hf) are valuable building blocks for materials science. Here, we synthesize a series of zirconium and hafnium oxo clusters with ligands that are typically used to stabilize oxide nanocrystals (fatty acids with long and/or branched chains). The fatty acid capped oxo clusters have a high solubility but do not crystallize, precluding traditional purification and single-crystal XRD analysis. We thus develop alternative purification strategies and we use X-ray total scattering and Pair Distribution Function (PDF) analysis as our main method to elucidate the structure of the cluster core. We identify the correct structure from a series of possible clusters (Zr3, Zr4, Zr6, Zr12, Zr10, and Zr26). Excellent refinements are only obtained when the ligands are part of the structure model. Further evidence for the cluster composition is provided by nuclear magnetic resonance (NMR), infrared spectroscopy (FTIR), thermogravimetry analysis (TGA), and mass spectrometry (MS). We find that hydrogen bonded carboxylic acid is an intrinsic part of the oxo cluster. Using our analytical tools, we elucidate the conversion from a Zr6 monomer to a Zr12 dimer (and vice versa), induced by carboxylate ligand exchange. Finally, we compare the catalytic performance of Zr12-oleate clusters with oleate capped, 5.5 nm zirconium oxide nanocrystals in the esterification of oleic acid with ethanol. The oxo clusters present a five times higher reaction rate, due to their higher surface area. Since the oxo clusters are the lower limit of downscaling oxide nanocrystals, we present them as appealing catalytic materials, and as atomically precise model systems. In addition, the lessons learned regarding PDF analysis are applicable to other areas of cluster science as well, from semiconductor and metal clusters, to polyoxometalates.
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Affiliation(s)
- Dietger Van den Eynden
- Department of Chemistry, University of BaselMattenstrasse 24a4058 BaselSwitzerland,Department of Chemistry, University of GhentKrijgslaan 2819000 GhentBelgium
| | - Rohan Pokratath
- Department of Chemistry, University of BaselMattenstrasse 24a4058 BaselSwitzerland
| | | | - Eline Goossens
- Department of Chemistry, University of BaselMattenstrasse 24a4058 BaselSwitzerland,Department of Chemistry, University of GhentKrijgslaan 2819000 GhentBelgium
| | | | - Jonathan De Roo
- Department of Chemistry, University of BaselMattenstrasse 24a4058 BaselSwitzerland
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6
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Wei Y, Du Q, Wang Y, Gao P, Wang Z, Jiang Y. Two-dimensional cellulose acetate membrane-supported mesoporous silica nanosheets for efficient nanosize-based molecules separation. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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7
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Lüdicke MG, Hildebrandt J, Schindler C, Sperling RA, Maskos M. Automated Quantum Dots Purification via Solid Phase Extraction. NANOMATERIALS 2022; 12:nano12121983. [PMID: 35745321 PMCID: PMC9230973 DOI: 10.3390/nano12121983] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/24/2022] [Accepted: 05/27/2022] [Indexed: 02/05/2023]
Abstract
The separation of colloidal nanocrystals from their original synthesis medium is an essential process step towards their application, however, the costs on a preparative scale are still a constraint. A new combination of approaches for the purification of hydrophobic Quantum Dots is presented, resulting in an efficient scalable process in regard to time and solvent consumption, using common laboratory equipment and low-cost materials. The procedure is based on a combination of solvent-induced adhesion and solid phase extraction. The platform allows the transition from manual handling towards automation, yielding an overall purification performance similar to one conventional batch precipitation/centrifugation step, which was investigated by thermogravimetry and gas chromatography. The distinct miscibility gaps between surfactants used as nanoparticle capping agents, original and extraction medium are clarified by their phase diagrams, which confirmed the outcome of the flow chemistry process. Furthermore, the solubility behavior of the Quantum Dots is put into context with the Hansen solubility parameters framework to reasonably decide upon appropriate solvent types.
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Affiliation(s)
- Malín G. Lüdicke
- Fraunhofer Institute for Microengineering and Microsystems IMM, 55129 Mainz, Germany; (J.H.); (C.S.); (M.M.)
- Correspondence: (M.G.L.); (R.A.S.)
| | - Jana Hildebrandt
- Fraunhofer Institute for Microengineering and Microsystems IMM, 55129 Mainz, Germany; (J.H.); (C.S.); (M.M.)
- Federal Institute for Materials Research and Testing, 12205 Berlin, Germany
| | - Christoph Schindler
- Fraunhofer Institute for Microengineering and Microsystems IMM, 55129 Mainz, Germany; (J.H.); (C.S.); (M.M.)
- Interbran Advanced Materials GmbH, 76684 Oestringen, Germany
| | - Ralph A. Sperling
- Fraunhofer Institute for Microengineering and Microsystems IMM, 55129 Mainz, Germany; (J.H.); (C.S.); (M.M.)
- Correspondence: (M.G.L.); (R.A.S.)
| | - Michael Maskos
- Fraunhofer Institute for Microengineering and Microsystems IMM, 55129 Mainz, Germany; (J.H.); (C.S.); (M.M.)
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8
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Greytak AB, Abiodun SL, Burrell JM, Cook EN, Jayaweera NP, Islam MM, Shaker AE. Thermodynamics of nanocrystal–ligand binding through isothermal titration calorimetry. Chem Commun (Camb) 2022; 58:13037-13058. [DOI: 10.1039/d2cc05012a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Manipulations of nanocrystal (NC) surfaces have propelled the applications of colloidal NCs across various fields such as bioimaging, catalysis, electronics, and sensing applications.
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Affiliation(s)
- Andrew B. Greytak
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Sakiru L. Abiodun
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Jennii M. Burrell
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Emily N. Cook
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Nuwanthaka P. Jayaweera
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Md Moinul Islam
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | - Abdulla E Shaker
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
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9
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Liu J, Enomoto K, Takeda K, Inoue D, Pu YJ. Simple cubic self-assembly of PbS quantum dots by finely controlled ligand removal through gel permeation chromatography. Chem Sci 2021; 12:10354-10361. [PMID: 34377421 PMCID: PMC8336479 DOI: 10.1039/d1sc02096j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Accepted: 07/05/2021] [Indexed: 11/21/2022] Open
Abstract
The geometry in self-assembled superlattices of colloidal quantum dots (QDs) strongly affects their optoelectronic properties and is thus of critical importance for applications in optoelectronic devices. Here, we achieve the selective control of the geometry of colloidal quasi-spherical PbS QDs in highly-ordered two and three dimensional superlattices: Disordered, simple cubic (sc), and face-centered cubic (fcc). Gel permeation chromatography (GPC), not based on size-exclusion effects, is developed to quantitatively and continuously control the ligand coverage of PbS QDs. The obtained QDs can retain their high stability and photoluminescence on account of the chemically soft removal of the ligands by GPC. With increasing ligand coverage, the geometry of the self-assembled superlattices by solution-casting of the GPC-processed PbS QDs changed from disordered, sc to fcc because of the finely controlled ligand coverage and anisotropy on QD surfaces. Importantly, the highly-ordered sc supercrystal usually displays unique superfluorescence and is expected to show high charge transporting properties, but it has not yet been achieved for colloidal quasi-spherical QDs. It is firstly accessible by fine-tuning the QD ligand density using the GPC method here. This selective formation of different geometric superlattices based on GPC promises applications of such colloidal quasi-spherical QDs in high-performance optoelectronic devices.
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Affiliation(s)
- Jianjun Liu
- RIKEN Center for Emergent Matter Science (CEMS) Wako Saitama 351-0198 Japan
| | - Kazushi Enomoto
- RIKEN Center for Emergent Matter Science (CEMS) Wako Saitama 351-0198 Japan
| | - Kotaro Takeda
- RIKEN Center for Emergent Matter Science (CEMS) Wako Saitama 351-0198 Japan
| | - Daishi Inoue
- RIKEN Center for Emergent Matter Science (CEMS) Wako Saitama 351-0198 Japan
| | - Yong-Jin Pu
- RIKEN Center for Emergent Matter Science (CEMS) Wako Saitama 351-0198 Japan
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10
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Dang Z, Manna L, Baranov D. Detection of Pb 2+ traces in dispersion of Cs 4PbBr 6 nanocrystals by in situ liquid cell transmission electron microscopy. NANOSCALE 2021; 13:2317-2323. [PMID: 33459324 DOI: 10.1039/d0nr08584g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The Cs4PbBr6 nanocrystals are often used as a starting material for the preparation of green-emitting CsPbBr3 perovskite nanocrystals by means of chemical and physical transformations. Herein, we probe the Cs4PbBr6 nanocrystals dispersed in a solvent by liquid cell transmission electron microscopy (LCTEM). The nanocrystal dispersion in toluene is placed between two electron-transparent membranes separated by a gold spacer in a liquid cell and studied in a high angular annular dark-field scanning TEM mode with a fixed electron dose rate. We observe the spontaneous nucleation and growth of round and dendrite-shaped nanoparticles under electron beam illumination in the areas of solution where no Cs4PbBr6 nanocrystals are seen. These newly-formed nanoparticles show high contrast and contain Pb as the only heavy element, suggesting that they are made from metallic lead and indicating Pb2+-containing species in solution as their precursor. Also, a small amount of Au0 nanoparticles are formed, most likely due to the dissolution of the gold spacer by free Br-containing species in the nanocrystal dispersion and a subsequent reduction of the leached species under the electron beam. The analysis of the UV-Vis absorption spectra of Cs4PbBr6 nanocrystals and the supernatant isolated from the synthesis points to mixed lead(ii) oleate/bromide species as the likely residue, corroborating LCTEM results. The identification of the residual precursors in Cs4PbBr6 nanocrystal samples after the post-synthetic isolation is an important task because the residues may alter the subsequent reactivity of the nanocrystals.
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Affiliation(s)
- Zhiya Dang
- School of Materials, Sun Yat-Sen University, Shenzhen, 518107, China.
| | - Liberato Manna
- Department of Nanochemistry, Italian Institute of Technology, Genova, 16163, Italy.
| | - Dmitry Baranov
- Department of Nanochemistry, Italian Institute of Technology, Genova, 16163, Italy.
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11
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Kagan CR, Bassett LC, Murray CB, Thompson SM. Colloidal Quantum Dots as Platforms for Quantum Information Science. Chem Rev 2020; 121:3186-3233. [DOI: 10.1021/acs.chemrev.0c00831] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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12
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Li C, Tardajos AP, Wang D, Choukroun D, Van Daele K, Breugelmans T, Bals S. A simple method to clean ligand contamination on TEM grids. Ultramicroscopy 2020; 221:113195. [PMID: 33348183 DOI: 10.1016/j.ultramic.2020.113195] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 12/06/2020] [Accepted: 12/13/2020] [Indexed: 11/17/2022]
Abstract
Colloidal nanoparticles (NPs) including nanowires and nanosheets made by chemical methods involve many organic ligands. When the structure of NPs is investigated via transmission electron microscopy (TEM), the organic ligands act as a source for e-beam induced deposition and this causes substantial build-up of carbon layers in the investigated areas, which is typically referred to as "contamination" in the field of electron microscopy. This contamination is often more severe for scanning TEM, a technique that is based on a focused electron beam and hence higher electron dose rate. In this paper, we report a simple and effective method to clean drop-cast TEM grids that contain NPs with ligands. Using a combination of activated carbon and ethanol, this method effectively reduces the amount of ligands on TEM grids, and therefore greatly improves the quality of electron microscopy images and subsequent analytical measurements. This efficient and facile method can be helpful during electron microscopy investigation of different kinds of nanomaterials that suffer from ligand-induced contamination.
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Affiliation(s)
- Chen Li
- Electron microscopy for Materials research (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium.
| | - Adrian Pedrazo Tardajos
- Electron microscopy for Materials research (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Da Wang
- Electron microscopy for Materials research (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Daniel Choukroun
- Applied Electrochemistry & Catalysis (ELCAT), University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Kevin Van Daele
- Applied Electrochemistry & Catalysis (ELCAT), University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Tom Breugelmans
- Applied Electrochemistry & Catalysis (ELCAT), University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium
| | - Sara Bals
- Electron microscopy for Materials research (EMAT), University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
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13
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Continuous-flow purification of silver nanoparticles and its integration with flow synthesis. J Flow Chem 2020. [DOI: 10.1007/s41981-020-00084-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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La Rosa M, Payne EH, Credi A. Semiconductor Quantum Dots as Components of Photoactive Supramolecular Architectures. ChemistryOpen 2020; 9:200-213. [PMID: 32055433 PMCID: PMC7008307 DOI: 10.1002/open.201900336] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Revised: 01/08/2020] [Indexed: 11/10/2022] Open
Abstract
Luminescent quantum dots (QDs) are colloidal semiconductor nanocrystals consisting of an inorganic core covered by a molecular layer of organic surfactants. Although QDs have been known for more than thirty years, they are still attracting the interest of researchers because of their unique size-tunable optical and electrical properties arising from quantum confinement. Moreover, the controlled decoration of the QD surface with suitable molecular species enables the rational design of inorganic-organic multicomponent architectures that can show a vast array of functionalities. This minireview highlights the recent progress in the use of surface-modified QDs - in particular, those based on cadmium chalcogenides - as supramolecular platforms for light-related applications such as optical sensing, triplet photosensitization, photocatalysis and phototherapy.
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Affiliation(s)
- Marcello La Rosa
- CLAN-Center for Light Activated Nanostructures Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, ViaGobetti 10140129BolognaItaly
- Dipartimento di Scienze e Tecnologie Agro-alimentariUniversità di BolognaViale Fanin 5040127BolognaItaly
| | - Emily H. Payne
- CLAN-Center for Light Activated Nanostructures Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, ViaGobetti 10140129BolognaItaly
- EaStChem School of ChemistryThe University of EdinburghDavid Brewster RoadEdinburghEH9 3FJUK
| | - Alberto Credi
- CLAN-Center for Light Activated Nanostructures Istituto per la Sintesi Organica e la Fotoreattività, Consiglio Nazionale delle Ricerche, ViaGobetti 10140129BolognaItaly
- Dipartimento di Chimica Industriale “Toso Montanari”Università di BolognaViale Risorgimento 440136BolognaItaly
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15
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Menter C, Segets D. Scalable classification of nanoparticles: A proof of principle for process design. ADV POWDER TECHNOL 2019. [DOI: 10.1016/j.apt.2019.08.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Dhaene E, Billet J, Bennett E, Van Driessche I, De Roo J. The Trouble with ODE: Polymerization during Nanocrystal Synthesis. NANO LETTERS 2019; 19:7411-7417. [PMID: 31525055 DOI: 10.1021/acs.nanolett.9b03088] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
1-Octadecene is a widely used solvent for high-temperature nanocrystal synthesis (120-320 °C). Here, we show that 1-octadecene spontaneously polymerizes under these conditions, and the resulting poly(1-octadecene) has a comparable solubility and size to nanocrystals stabilized by hydrophobic ligands. Typical purification procedures (precipitation/redispersion cycles or size exclusion chromatography) fail to separate the poly(1-octadecene) impurity from the nanocrystal product. To avoid formation of poly(1-octadecene), we replace 1-octadecene with saturated, aliphatic solvents. Alternatively, the nanocrystals' native ligands are exchanged for polar ligands, leading to significant solubility differences between nanocrystals and poly(1-octadecene), therefore allowing isolation of pure nanocrystals, free from polymer impurities. These results will help design superior syntheses and improve nanocrystal purity, an important factor in many applications.
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Affiliation(s)
- Evert Dhaene
- Department of Chemistry , Ghent University , Gent B-9000 , Belgium
| | - Jonas Billet
- Department of Chemistry , Ghent University , Gent B-9000 , Belgium
| | - Ellie Bennett
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | | | - Jonathan De Roo
- Department of Chemistry , Ghent University , Gent B-9000 , Belgium
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
- Department of Chemistry , University of Basel , Basel CH-4058 , Switzerland
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17
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Haryadi BM, Hafner D, Amin I, Schubel R, Jordan R, Winter G, Engert J. Nonspherical Nanoparticle Shape Stability Is Affected by Complex Manufacturing Aspects: Its Implications for Drug Delivery and Targeting. Adv Healthc Mater 2019; 8:e1900352. [PMID: 31410996 DOI: 10.1002/adhm.201900352] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 07/05/2019] [Indexed: 02/04/2023]
Abstract
The shape of nanoparticles is known recently as an important design parameter influencing considerably the fate of nanoparticles with and in biological systems. Several manufacturing techniques to generate nonspherical nanoparticles as well as studies on in vitro and in vivo effects thereof have been described. However, nonspherical nanoparticle shape stability in physiological-related conditions and the impact of formulation parameters on nonspherical nanoparticle resistance still need to be investigated. To address these issues, different nanoparticle fabrication methods using biodegradable polymers are explored to produce nonspherical nanoparticles via the prevailing film-stretching method. In addition, systematic comparisons to other nanoparticle systems prepared by different manufacturing techniques and less biodegradable materials (but still commonly utilized for drug delivery and targeting) are conducted. The study evinces that the strong interplay from multiple nanoparticle properties (i.e., internal structure, Young's modulus, surface roughness, liquefaction temperature [glass transition (Tg ) or melting (Tm )], porosity, and surface hydrophobicity) is present. It is not possible to predict the nonsphericity longevity by merely one or two factor(s). The most influential features in preserving the nonsphericity of nanoparticles are existence of internal structure and low surface hydrophobicity (i.e., surface-free energy (SFE) > ≈55 mN m-1 , material-water interfacial tension <6 mN m-1 ), especially if the nanoparticles are soft (<1 GPa), rough (Rrms > 10 nm), porous (>1 m2 g-1 ), and in possession of low bulk liquefaction temperature (<100 °C). Interestingly, low surface hydrophobicity of nanoparticles can be obtained indirectly by the significant presence of residual stabilizers. Therefore, it is strongly suggested that nonsphericity of particle systems is highly dependent on surface chemistry but cannot be appraised separately from other factors. These results and reviews allot valuable guidelines for the design and manufacturing of nonspherical nanoparticles having adequate shape stability, thereby appropriate with their usage purposes. Furthermore, they can assist in understanding and explaining the possible mechanisms of nonspherical nanoparticles effectivity loss and distinctive material behavior at the nanoscale.
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Affiliation(s)
- Bernard Manuel Haryadi
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
| | - Daniel Hafner
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Ihsan Amin
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Rene Schubel
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Rainer Jordan
- Department of ChemistryDresden University of Technology Mommsenstraße 4 01069 Dresden Germany
| | - Gerhard Winter
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
| | - Julia Engert
- Pharmaceutical Technology and BiopharmaceuticsDepartment of PharmacyLudwig‐Maximilians‐Universität München Butenandtstraße 5 81377 Munich Germany
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18
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Probing ligand removal and ordering at quantum dot surfaces using vibrational sum frequency generation spectroscopy. J Colloid Interface Sci 2019; 537:389-395. [DOI: 10.1016/j.jcis.2018.11.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/09/2018] [Accepted: 11/06/2018] [Indexed: 01/19/2023]
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19
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Lignos I, Morad V, Shynkarenko Y, Bernasconi C, Maceiczyk RM, Protesescu L, Bertolotti F, Kumar S, Ochsenbein ST, Masciocchi N, Guagliardi A, Shih CJ, Bodnarchuk MI, deMello AJ, Kovalenko MV. Exploration of Near-Infrared-Emissive Colloidal Multinary Lead Halide Perovskite Nanocrystals Using an Automated Microfluidic Platform. ACS NANO 2018; 12:5504-5517. [PMID: 29754493 PMCID: PMC6024237 DOI: 10.1021/acsnano.8b01122] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 05/12/2018] [Indexed: 05/18/2023]
Abstract
Hybrid organic-inorganic and fully inorganic lead halide perovskite nanocrystals (NCs) have recently emerged as versatile solution-processable light-emitting and light-harvesting optoelectronic materials. A particularly difficult challenge lies in warranting the practical utility of such semiconductor NCs in the red and infrared spectral regions. In this context, all three archetypal A-site monocationic perovskites-CH3NH3PbI3, CH(NH2)2PbI3, and CsPbI3-suffer from either chemical or thermodynamic instabilities in their bulk form. A promising approach toward the mitigation of these challenges lies in the formation of multinary compositions (mixed cation and mixed anion). In the case of multinary colloidal NCs, such as quinary Cs xFA1- xPb(Br1- yI y)3 NCs, the outcome of the synthesis is defined by a complex interplay between the bulk thermodynamics of the solid solutions, crystal surface energies, energetics, dynamics of capping ligands, and the multiple effects of the reagents in solution. Accordingly, the rational synthesis of such NCs is a formidable challenge. Herein, we show that droplet-based microfluidics can successfully tackle this problem and synthesize Cs xFA1- xPbI3 and Cs xFA1- xPb(Br1- yI y)3 NCs in both a time- and cost-efficient manner. Rapid in situ photoluminescence and absorption measurements allow for thorough parametric screening, thereby permitting precise optical engineering of these NCs. In this showcase study, we fine-tune the photoluminescence maxima of such multinary NCs between 700 and 800 nm, minimize their emission line widths (to below 40 nm), and maximize their photoluminescence quantum efficiencies (up to 89%) and phase/chemical stabilities. Detailed structural analysis revealed that the Cs xFA1- xPb(Br1- yI y)3 NCs adopt a cubic perovskite structure of FAPbI3, with iodide anions partially substituted by bromide ions. Most importantly, we demonstrate the excellent transference of reaction parameters from microfluidics to a conventional flask-based environment, thereby enabling up-scaling and further implementation in optoelectronic devices. As an example, Cs xFA1- xPb(Br1- yI y)3 NCs with an emission maximum at 735 nm were integrated into light-emitting diodes, exhibiting a high external quantum efficiency of 5.9% and a very narrow electroluminescence spectral bandwidth of 27 nm.
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Affiliation(s)
- Ioannis Lignos
- Institute for Chemical
and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
| | - Viktoriia Morad
- Institute for Chemical
and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Yevhen Shynkarenko
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Caterina Bernasconi
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Richard M. Maceiczyk
- Institute for Chemical
and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
| | - Loredana Protesescu
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Federica Bertolotti
- Dipartimento di Scienza e Alta Tecnologia
and To.Sca.Lab, Università dell’Insubria, Via Valleggio 11, I-22100 Como, Italy
- Aarhus Institute of Advanced Studies (AIAS), Aarhus University, Høegh-Guldbergs Gade 6B, 8000 Aarhus C, Denmark
| | - Sudhir Kumar
- Institute for Chemical
and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
| | - Stefan T. Ochsenbein
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
| | - Norberto Masciocchi
- Dipartimento di Scienza e Alta Tecnologia
and To.Sca.Lab, Università dell’Insubria, Via Valleggio 11, I-22100 Como, Italy
| | - Antonietta Guagliardi
- Istituto di Cristallografia, Consiglio Nazionale delle Ricerche, and To.Sca.Lab, via Valleggio 11, I-22100 Como, Italy
| | - Chih-Jen Shih
- Institute for Chemical
and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
| | - Maryna I. Bodnarchuk
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
- E-mail:
| | - Andrew J. deMello
- Institute for Chemical
and Bioengineering, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
- E-mail:
| | - Maksym V. Kovalenko
- Institute
of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zürich 8093, Switzerland
- Empa-Swiss
Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf 8600, Switzerland
- E-mail:
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20
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Li P, Kumar A, Ma J, Kuang Y, Luo L, Sun X. Density gradient ultracentrifugation for colloidal nanostructures separation and investigation. Sci Bull (Beijing) 2018; 63:645-662. [PMID: 36658885 DOI: 10.1016/j.scib.2018.04.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Revised: 03/27/2018] [Accepted: 03/28/2018] [Indexed: 01/21/2023]
Abstract
In this article, we review the advancement in nanoseparation and concomitant purification of nanoparticles (NPs) by using density gradient ultracentrifugation technique (DGUC) and demonstrated by taking several typical examples. Study emphasizes the conceptual advances in classification, mechanism of DGUC and synthesis-structure-property relationships of NPs to provide the significant clue for the further synthesis optimization. Separation, concentration, and purification of NPs by DGUC can be achieved at the same time by introducing the water/oil interfaces into the separation chamber. We can develop an efficient method "lab in a tube" by introducing a reaction zone or an assembly zone in the gradient to find the surface reaction and assembly mechanism of NPs since the reaction time can be precisely controlled and the chemical environment change can be extremely fast. Finally, to achieve the best separation parameters for the colloidal systems, we gave the mathematical descriptions and computational optimized models as a new direction for making practicable and predictable DGUC separation method. Thus, it can be helpful for an efficient separation as well as for the synthesis optimization, assembly and surface reactions as a potential cornerstone for the future development in the nanotechnology and this review can be served as a plethora of advanced notes on the DGUC separation method.
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Affiliation(s)
- Pengsong Li
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Anuj Kumar
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Jun Ma
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yun Kuang
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Liang Luo
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xiaoming Sun
- State Key Laboratory of Chemical Resource Engineering, College of Energy, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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21
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Carroll GM, Limpens R, Neale NR. Tuning Confinement in Colloidal Silicon Nanocrystals with Saturated Surface Ligands. NANO LETTERS 2018; 18:3118-3124. [PMID: 29659285 DOI: 10.1021/acs.nanolett.8b00680] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The optical properties of silicon nanocrystals (Si NCs) are a subject of intense study and continued debate. In particular, Si NC photoluminescence (PL) properties are known to depend strongly on the surface chemistry, resulting in electron-hole recombination pathways derived from the Si NC band-edge, surface-state defects, or combined NC-conjugated ligand hybrid states. In this Letter, we perform a comparison of three different saturated surface functional groups-alkyls, amides, and alkoxides-on nonthermal plasma-synthesized Si NCs. We find a systematic and size-dependent high-energy (blue) shift in the PL spectrum of Si NCs with amide and alkoxy functionalization relative to alkyl. Time-resolved photoluminescence and transient absorption spectroscopies reveal no change in the excited-state dynamics between Si NCs functionalized with alkyl, amide, or alkoxide ligands, showing for the first time that saturated ligands-not only surface-derived charge-transfer states or hybridization between NC and low-lying ligand orbitals-are responsible for tuning the Si NC optical properties. To explain these PL shifts we propose that the atom bound to the Si NC surface strongly interacts with the Si NC electronic wave function and modulates the Si NC quantum confinement. These results reveal a potentially broadly applicable correlation between the optoelectronic properties of Si NCs and related quantum-confined structures based on the interaction between NC surfaces and the ligand binding group.
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Affiliation(s)
- Gerard M Carroll
- Chemistry and Nanoscience Center , National Renewable Energy Laboratory , 15013 Denver West Parkway , Golden , Colorado 80401 , United States
| | - Rens Limpens
- Chemistry and Nanoscience Center , National Renewable Energy Laboratory , 15013 Denver West Parkway , Golden , Colorado 80401 , United States
| | - Nathan R Neale
- Chemistry and Nanoscience Center , National Renewable Energy Laboratory , 15013 Denver West Parkway , Golden , Colorado 80401 , United States
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22
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Pan LJ, Tu JW, Ma HT, Yang YJ, Tian ZQ, Pang DW, Zhang ZL. Controllable synthesis of nanocrystals in droplet reactors. LAB ON A CHIP 2017; 18:41-56. [PMID: 29098217 DOI: 10.1039/c7lc00800g] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In recent years, a broad range of nanocrystals have been synthesized in droplet-based microfluidic reactors which provide obvious advantages, such as accurate manipulation, better reproducibility and reliable automation. In this review, we initially introduce general concepts of droplet reactors followed by discussions of their main functional regions including droplet generation, mixing of reactants, reaction controlling, in situ monitoring, and reaction quenching. Subsequently, the enhanced mass and heat transport properties are discussed. Next, we focus on research frontiers including sequential multistep synthesis, intelligent synthesis, reliable scale-up synthesis, and interfacial synthesis. Finally, we end with an outlook on droplet reactors, especially highlighting some aspects such as large-scale production, the integrated process of synthesis and post-synthetic treatments, automated droplet reactors with in situ monitoring and optimizing algorithms, and rapidly developing strategies for interfacial synthesis.
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Affiliation(s)
- Liang-Jun Pan
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072, People's Republic of China.
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23
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Roberge A, Stein JL, Shen Y, Cossairt BM, Greytak AB. Purification and In Situ Ligand Exchange of Metal-Carboxylate-Treated Fluorescent InP Quantum Dots via Gel Permeation Chromatography. J Phys Chem Lett 2017; 8:4055-4060. [PMID: 28799766 DOI: 10.1021/acs.jpclett.7b01772] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Recently the addition of M2+ Lewis acids (M = Cd, Zn) to InP quantum dots (QDs) has been shown to enhance the photoluminescence quantum yield (PL QY). Here we investigate the stability of this Lewis acid layer to postsynthetic processing such as purification and ligand exchange. We utilize gel permeation chromatography to purify the quantum-dot samples as well as to aid in the ligand-exchange reactions. The Lewis-acid-capped particles are stable to purification and maintain the enhanced luminescence properties. We demonstrate successful ligand exchange on the quantum dots by switching the native carboxylate ligands to phosphonate ligands. Changes in the optical spectra after exposure to ambient environment indicate that both carboxylate- and phosphonate-capped QDs remain air-sensitive.
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Affiliation(s)
- Adam Roberge
- Department of Chemistry and Biochemistry, University of South Carolina , Columbia, South Carolina 29208, United States
| | - Jennifer L Stein
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Yi Shen
- Department of Chemistry and Biochemistry, University of South Carolina , Columbia, South Carolina 29208, United States
| | - Brandi M Cossairt
- Department of Chemistry, University of Washington , Seattle, Washington 98195, United States
| | - Andrew B Greytak
- Department of Chemistry and Biochemistry, University of South Carolina , Columbia, South Carolina 29208, United States
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24
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Liu Y, Shen D, Chen G, Elzatahry AA, Pal M, Zhu H, Wu L, Lin J, Al-Dahyan D, Li W, Zhao D. Mesoporous Silica Thin Membranes with Large Vertical Mesochannels for Nanosize-Based Separation. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1702274. [PMID: 28719071 DOI: 10.1002/adma.201702274] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2017] [Revised: 05/27/2017] [Indexed: 06/07/2023]
Abstract
Membrane separation technologies are of great interest in industrial processes such as water purification, gas separation, and materials synthesis. However, commercial filtration membranes have broad pore size distributions, leading to poor size cutoff properties. In this work, mesoporous silica thin membranes with uniform and large vertical mesochannels are synthesized via a simple biphase stratification growth method, which possess an intact structure over centimeter size, ultrathin thickness (≤50 nm), high surface areas (up to 1420 m2 g-1 ), and tunable pore sizes from ≈2.8 to 11.8 nm by adjusting the micelle parameters. The nanofilter devices based on the free-standing mesoporous silica thin membranes show excellent performances in separating differently sized gold nanoparticles (>91.8%) and proteins (>93.1%) due to the uniform pore channels. This work paves a promising way to develop new membranes with well-defined pore diameters for highly efficient nanosize-based separation at the macroscale.
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Affiliation(s)
- Yupu Liu
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Dengke Shen
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Gang Chen
- School of Physical Science and Technology, Shanghai Tech University, Shanghai, 201210, China
| | - Ahmed A Elzatahry
- Materials Science and Tech Program, College of Arts and Sciences, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Manas Pal
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Hongwei Zhu
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Longlong Wu
- School of Physical Science and Technology, Shanghai Tech University, Shanghai, 201210, China
| | - Jianjian Lin
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | | | - Wei Li
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
| | - Dongyuan Zhao
- Department of Chemistry, Laboratory of Advanced Materials, Shanghai Key Lab of Molecular Catalysis and Innovative Materials, iChEM and State Key Laboratory of Molecular Engineering of Polymers, Fudan University, Shanghai, 200433, P. R. China
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25
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Loginov M, Samper F, Gésan-Guiziou G, Sobisch T, Lerche D, Vorobiev E. Centrifugal ultrafiltration for determination of filter cake properties of colloids. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.04.064] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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26
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Shen Y, Weeranoppanant N, Xie L, Chen Y, Lusardi MR, Imbrogno J, Bawendi MG, Jensen KF. Multistage extraction platform for highly efficient and fully continuous purification of nanoparticles. NANOSCALE 2017; 9:7703-7707. [PMID: 28561116 DOI: 10.1039/c7nr01826f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This paper presents a fully-continuous novel liquid-liquid-extraction (LLE) platform for the purification of nanoparticles. The use of multistage operation enhances the purity of the final stream without the expense of high solvent consumption. Two case studies, purification of CdSe quantum dots in organic solvent and that of gold nanoparticles in water, demonstrate that the LLE platform is versatile, non-destructive, and highly efficient.
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Affiliation(s)
- Yi Shen
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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27
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Akdas T, Haderlein M, Walter J, Apeleo Zubiri B, Spiecker E, Peukert W. Continuous synthesis of CuInS2 quantum dots. RSC Adv 2017. [DOI: 10.1039/c6ra27052b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The impact of reactor type on synthesis parameters and disperse properties.
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Affiliation(s)
- T. Akdas
- Institute of Particle Technology (LFG)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
- 91058 Erlangen
- Germany
- Cluster of Excellence – Engineering of Advanced Materials (EAM)
| | - M. Haderlein
- Institute of Particle Technology (LFG)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
- 91058 Erlangen
- Germany
- Cluster of Excellence – Engineering of Advanced Materials (EAM)
| | - J. Walter
- Institute of Particle Technology (LFG)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
- 91058 Erlangen
- Germany
- Cluster of Excellence – Engineering of Advanced Materials (EAM)
| | - B. Apeleo Zubiri
- Center for Nanoanalysis and Electron Microscopy (CENEM)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
- 91058 Erlangen
- Germany
- Cluster of Excellence – Engineering of Advanced Materials (EAM)
| | - E. Spiecker
- Center for Nanoanalysis and Electron Microscopy (CENEM)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
- 91058 Erlangen
- Germany
- Cluster of Excellence – Engineering of Advanced Materials (EAM)
| | - W. Peukert
- Institute of Particle Technology (LFG)
- Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU)
- 91058 Erlangen
- Germany
- Cluster of Excellence – Engineering of Advanced Materials (EAM)
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28
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UEMATSU T. Improvement of Optical Properties for Semiconductor Nanoparticles by the Precise Control of Electron and Energy Transfer. ELECTROCHEMISTRY 2017. [DOI: 10.5796/electrochemistry.85.543] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Taro UEMATSU
- Frontier Research Base for Global Young Researchers, Graduate School of Engineering, Osaka University
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University
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