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Yang X, Deng Y, Yang H, Liao Y, Cheng X, Zou Y, Wu L, Deng Y. Functionalization of Mesoporous Semiconductor Metal Oxides for Gas Sensing: Recent Advances and Emerging Challenges. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 10:e2204810. [PMID: 36373719 PMCID: PMC9811452 DOI: 10.1002/advs.202204810] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/14/2022] [Indexed: 06/16/2023]
Abstract
With the emerging of the Internet of Things, chemiresistive gas sensors have been extensively applied in industrial production, food safety, medical diagnosis, and environment detection, etc. Considerable efforts have been devoted to improving the gas-sensing performance through tailoring the structure, functions, defects and electrical conductivity of sensitive materials. Among the numerous sensitive materials, mesoporous semiconductor metal oxides possess unparalleled properties, including tunable pore size, high specific surface area, abundant metal-oxygen bonds, and rapid mass transfer/diffusion behavior (Knudsen diffusion), which have been regarded as the most potential sensitive materials. Herein, the synthesis strategies for mesoporous metal oxides are overviewed, the classical functionalization techniques of sensitive materials are also systemically summarized as a highlight, including construction of mesoporous structure, regulation of micro-nano structure (i.e., heterojunctions), noble metal sensitization (e.g., Au, Pt, Ag, Pd) and heteroatomic doping (e.g., C, N, Si, S). In addition, the structure-function relationship of sensitive materials has been discussed at molecular-atomic level, especially for the chemical sensitization effect, elucidating the interface adsorption/catalytic mechanism. Moreover, the challenges and perspectives are proposed, which will open a new door for the development of intelligent gas sensor in various applications.
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Affiliation(s)
- Xuanyu Yang
- Department of ChemistryDepartment of Gastroenterology and HepatologyZhongshan HospitalZhangjiang Fudan International Innovation CenterState Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsiCHEMFudan UniversityShanghai200433China
| | - Yu Deng
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai201620China
| | - Haitao Yang
- School of Materials Science and EngineeringNanchang Hangkong UniversityNanchang330063China
| | - Yaozu Liao
- State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringInstitute of Functional MaterialsDonghua UniversityShanghai201620China
| | - Xiaowei Cheng
- Department of ChemistryDepartment of Gastroenterology and HepatologyZhongshan HospitalZhangjiang Fudan International Innovation CenterState Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsiCHEMFudan UniversityShanghai200433China
| | - Yidong Zou
- Department of ChemistryDepartment of Gastroenterology and HepatologyZhongshan HospitalZhangjiang Fudan International Innovation CenterState Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsiCHEMFudan UniversityShanghai200433China
| | - Limin Wu
- Institute of Energy and Materials ChemistryInner Mongolia UniversityHohhot010021China
| | - Yonghui Deng
- Department of ChemistryDepartment of Gastroenterology and HepatologyZhongshan HospitalZhangjiang Fudan International Innovation CenterState Key Laboratory of Molecular Engineering of PolymersShanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsiCHEMFudan UniversityShanghai200433China
- School of Materials Science and EngineeringNanchang Hangkong UniversityNanchang330063China
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2
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Pan JA, Wu H, Gomez A, Ondry JC, Portner J, Cho W, Hinkle A, Wang D, Talapin DV. Ligand-Free Direct Optical Lithography of Bare Colloidal Nanocrystals via Photo-Oxidation of Surface Ions with Porosity Control. ACS NANO 2022; 16:16067-16076. [PMID: 36121002 DOI: 10.1021/acsnano.2c04189] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Microscale patterning of colloidal nanocrystal (NC) films is important for their integration in devices. Here, we introduce the direct optical patterning of all-inorganic NCs without the use of additional photosensitive ligands or additives. We determined that photoexposure of ligand-stripped, "bare" NCs in air significantly reduces their solubility in polar solvents due to photo-oxidation of surface ions. Doses as low as 20 mJ/cm2 could be used; the only obvious criterion for material selection is that the NCs need to have significant absorption at the irradiation wavelength. However, transparent NCs can still be patterned by mixing them with suitably absorbing NCs. This approach enabled the patterning of bare ZnSe, CdSe, ZnS, InP, CeO2, CdSe/CdS, and CdSe/ZnS NCs as well as mixtures of ZrO2 or HfO2 NCs with ZnSe NCs. Optical, X-ray photoelectron, and infrared spectroscopies show that solubility loss results from desorption of bound solvent due to photo-oxidation of surface ions. We also demonstrate two approaches, compatible with our patterning method, for modulating the porosity and refractive index of NC films. Block copolymer templating decreases the film density, and thus the refractive index, by introducing mesoporosity. Alternatively, hot isostatic pressing increases the packing density and refractive index of NC layers. For example, the packing fraction of a ZnS NC film can be increased from 0.51 to 0.87 upon hot isostatic pressing at 450 °C and 15 000 psi. Our findings demonstrate that direct lithography by photo-oxidation of bare NC surfaces is an accessible patterning method for facilitating the exploration of more complex NC device architectures while eliminating the influence of bulky or insulating surfactants.
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Affiliation(s)
- Jia-Ahn Pan
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Haoqi Wu
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Anthony Gomez
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Justin C Ondry
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Joshua Portner
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Wooje Cho
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Alex Hinkle
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Di Wang
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
| | - Dmitri V Talapin
- Department of Chemistry, James Franck Institute, and Pritzker School of Molecular Engineering, University of Chicago, Chicago, Illinois 60637, United States
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
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Zou Y, Zhou X, Ma J, Yang X, Deng Y. Recent advances in amphiphilic block copolymer templated mesoporous metal-based materials: assembly engineering and applications. Chem Soc Rev 2020; 49:1173-1208. [PMID: 31967137 DOI: 10.1039/c9cs00334g] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Mesoporous metal-based materials (MMBMs) have received unprecedented attention in catalysis, sensing, and energy storage and conversion owing to their unique electronic structures, uniform mesopore size and high specific surface area. In the last decade, great progress has been made in the design and application of MMBMs; in particular, many novel assembly engineering methods and strategies based on amphiphilic block copolymers as structure-directing agents have also been developed for the "bottom-up" construction of a variety of MMBMs. Development of MMBMs is therefore of significant importance from both academic and practical points of view. In this review, we provide a systematic elaboration of the molecular assembly methods and strategies for MMBMs, such as tuning the driving force between amphiphilic block copolymers and various precursors (i.e., metal salts, nanoparticles/clusters and polyoxometalates) for pore characteristics and physicochemical properties. The structure-performance relationship of MMBMs (e.g., pore size, surface area, crystallinity and crystal structure) based on various spectroscopy analysis techniques and density functional theory (DFT) calculation is discussed and the influence of the surface/interfacial properties of MMBMs (e.g., active surfaces, heterojunctions, binding sites and acid-base properties) in various applications is also included. The prospect of accurately designing functional mesoporous materials and future research directions in the field of MMBMs is pointed out in this review, and it will open a new avenue for the inorganic-organic assembly in various fields.
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Affiliation(s)
- Yidong Zou
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, iChEM, Fudan University, Shanghai 200433, China.
| | - Xinran Zhou
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, iChEM, Fudan University, Shanghai 200433, China.
| | - Junhao Ma
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, iChEM, Fudan University, Shanghai 200433, China.
| | - Xuanyu Yang
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, iChEM, Fudan University, Shanghai 200433, China.
| | - Yonghui Deng
- Department of Chemistry, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, iChEM, Fudan University, Shanghai 200433, China. and State Key Lab of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China
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4
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Peveler WJ, Jia H, Jeen T, Rees K, Macdonald TJ, Xia Z, Chio WIK, Moorthy S, Parkin IP, Carmalt CJ, Algar WR, Lee TC. Cucurbituril-mediated quantum dot aggregates formed by aqueous self-assembly for sensing applications. Chem Commun (Camb) 2019; 55:5495-5498. [DOI: 10.1039/c9cc00410f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Supramolecular ‘gluing’ of quantum dots is demonstrated with cucurbituril and we present the opportunity to create molecular host–guest sensing schemes.
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Affiliation(s)
- William J. Peveler
- Division of Biomedical Engineering
- School of Engineering
- University of Glasgow
- Glasgow
- UK
| | - Hui Jia
- Institute for Materials Discovery
- University College London (UCL)
- UK
| | - Tiffany Jeen
- Department of Chemistry
- 2036 Main Mall
- University of British Columbia
- Vancouver
- Canada
| | - Kelly Rees
- Department of Chemistry
- 2036 Main Mall
- University of British Columbia
- Vancouver
- Canada
| | | | - Zhicheng Xia
- Department of Chemistry
- 2036 Main Mall
- University of British Columbia
- Vancouver
- Canada
| | - Weng-I Katherine Chio
- Institute for Materials Discovery
- University College London (UCL)
- UK
- Department of Chemistry
- University College London (UCL)
| | - Suresh Moorthy
- Institute for Materials Discovery
- University College London (UCL)
- UK
| | - Ivan P. Parkin
- Department of Chemistry
- University College London (UCL)
- London
- UK
| | | | - W. Russ Algar
- Department of Chemistry
- 2036 Main Mall
- University of British Columbia
- Vancouver
- Canada
| | - Tung-Chun Lee
- Institute for Materials Discovery
- University College London (UCL)
- UK
- Department of Chemistry
- University College London (UCL)
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5
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Bahrami K, Bakhtiarian M. Mesoporous Titania-Alumina Mixed Oxide: A Heterogeneous Nanocatalyst for the Synthesis of 2-Substituted Benzimidazoles, Benzothiazoles and Benzoxazoles. ChemistrySelect 2018. [DOI: 10.1002/slct.201801782] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kiumars Bahrami
- Department of Organic Chemistry, Faculty of Chemistry; Razi University; Kermanshah 67149-67346 Iran
- Nanoscience and Nanotechnology Research Center (NNRC); Razi University; Kermanshah 67149-67346 Iran
| | - Mohsen Bakhtiarian
- Department of Organic Chemistry, Faculty of Chemistry; Razi University; Kermanshah 67149-67346 Iran
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6
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Study of the potential use of mesoporous nanomaterials as fining agent to prevent protein haze in white wines and its impact in major volatile aroma compounds and polyols. Food Chem 2018; 240:751-758. [DOI: 10.1016/j.foodchem.2017.07.163] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 07/29/2017] [Accepted: 07/31/2017] [Indexed: 11/16/2022]
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Heo S, Kim J, Ong GK, Milliron DJ. Template-Free Mesoporous Electrochromic Films on Flexible Substrates from Tungsten Oxide Nanorods. NANO LETTERS 2017; 17:5756-5761. [PMID: 28786677 DOI: 10.1021/acs.nanolett.7b02730] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Low-temperature processed mesoporous nanocrystal thin films are platforms for fabricating functional composite thin films on flexible substrates. Using a random arrangement of anisotropic nanocrystals can be a facile solution to generate pores without templates. However, the tendency for anisotropic particles to spontaneously assemble into a compact structure must be overcome. Here, we present a method to achieve random networking of nanorods during solution phase deposition by switching their ligand-stabilized colloidal nature into a charge-stabilized nature by a ligand-stripping chemistry. Ligand-stripped tungsten suboxide (WO2.72) nanorods result in uniform mesoporous thin films owing to repulsive electrostatic forces preventing nanorods from densely packing. Porosity and pore size distribution of thin films are controlled by changing the aspect ratio of the nanorods. This template-free mesoporous structure, achieved without annealing, provides a framework for introducing guest components, therefore enabling our fabrication of inorganic nanocomposite electrochromic films on flexible substrates. Following infilling of niobium polyoxometalate clusters into pores and successive chemical condensation, a WOx-NbOx composite film is produced that selectively controls visible and near-infrared light transmittance without any annealing required. The composite shows rapid switching kinetics and can be stably cycled between optical states over 2000 times. This simple strategy of using anisotropic nanocrystals gives insight into mesoporous thin film fabrication with broader applications for flexible devices.
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Affiliation(s)
- Sungyeon Heo
- McKetta Department of Chemical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Jongwook Kim
- McKetta Department of Chemical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Gary K Ong
- McKetta Department of Chemical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States
- Department of Materials Science and Engineering, University of California, Berkeley , Berkeley, California 94720, United States
| | - Delia J Milliron
- McKetta Department of Chemical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States
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8
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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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9
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Williams TE, Ushizima D, Zhu C, Anders A, Milliron DJ, Helms BA. Nearest-neighbour nanocrystal bonding dictates framework stability or collapse in colloidal nanocrystal frameworks. Chem Commun (Camb) 2017; 53:4853-4856. [PMID: 28421213 DOI: 10.1039/c6cc10183f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Block copolymers serve as architecture-directing agents for the assembly of colloidal nanocrystals into a variety of mesoporous solids. Here we report the fundamental order-disorder transition in such assemblies, which yield, on one hand, ordered colloidal nanocrystals frameworks or, alternatively, disordered mesoporous nanocrystal films. Our determination of the order-disorder transition is based on extensive image analysis of films after thermal processing. The number of nearest-nanocrystal neighbours emerges as a critical parameter dictating assembly outcomes, which is in turn determined by the nanocrystal volume fraction (fNC). We also identify the minimum fNC needed to support the structure against collapse.
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Affiliation(s)
- Teresa E Williams
- Graduate Group in Applied Science and Technology, University of California-Berkeley, Berkeley, CA 94720, USA
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10
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Lesel BK, Ko JS, Dunn B, Tolbert SH. Mesoporous LixMn2O4 Thin Film Cathodes for Lithium-Ion Pseudocapacitors. ACS NANO 2016; 10:7572-7581. [PMID: 27472531 DOI: 10.1021/acsnano.6b02608] [Citation(s) in RCA: 102] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Charge storage devices with high energy density and enhanced rate capabilities are highly sought after in today's mobile world. Although several high-rate pseudocapacitive anode materials have been reported, cathode materials operating in a high potential range versus lithium metal are much less common. Here, we present a nanostructured version of the well-known cathode material, LiMn2O4. The reduction in lithium-ion diffusion lengths and improvement in rate capabilities is realized through a combination of nanocrystallinity and the formation of a 3-D porous framework. Materials were fabricated from nanoporous Mn3O4 films made by block copolymer templating of preformed nanocrystals. The nanoporous Mn3O4 was then converted via solid-state reaction with LiOH to nanoporous LixMn2O4 (1 < x < 2). The resulting films had a wall thickness of ∼15 nm, which is small enough to be impacted by inactive surface sites. As a consequence, capacity was reduced by about half compared to bulk LiMn2O4, but both charge and discharge kinetics as well as cycling stability were improved significantly. Kinetic analysis of the redox reactions was used to verify the pseudocapacitive mechanisms of charge storage and establish the feasibility of using nanoporous LixMn2O4 as a cathode in lithium-ion devices based on pseudocapacitive charge storage.
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Affiliation(s)
- Benjamin K Lesel
- Department of Chemistry and Biochemistry, ‡Department of Materials Science and Engineering, and §The California NanoSystems Institute, UCLA , Los Angeles, California 90095, United States
| | - Jesse S Ko
- Department of Chemistry and Biochemistry, ‡Department of Materials Science and Engineering, and §The California NanoSystems Institute, UCLA , Los Angeles, California 90095, United States
| | - Bruce Dunn
- Department of Chemistry and Biochemistry, ‡Department of Materials Science and Engineering, and §The California NanoSystems Institute, UCLA , Los Angeles, California 90095, United States
| | - Sarah H Tolbert
- Department of Chemistry and Biochemistry, ‡Department of Materials Science and Engineering, and §The California NanoSystems Institute, UCLA , Los Angeles, California 90095, United States
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Abstract
Nanomanufacturing, the commercially scalable and economically sustainable mass production of nanoscale materials and devices, represents the tangible outcome of the nanotechnology revolution. In contrast to those used in nanofabrication for research purposes, nanomanufacturing processes must satisfy the additional constraints of cost, throughput, and time to market. Taking silicon integrated circuit manufacturing as a baseline, we consider the factors involved in matching processes with products, examining the characteristics and potential of top-down and bottom-up processes, and their combination. We also discuss how a careful assessment of the way in which function can be made to follow form can enable high-volume manufacturing of nanoscale structures with the desired useful, and exciting, properties.
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Affiliation(s)
- J. Alexander Liddle
- Center for Nanoscale Science and Technology, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899
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12
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Helms BA, Williams TE, Buonsanti R, Milliron DJ. Colloidal Nanocrystal Frameworks. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:5820-9. [PMID: 25874909 DOI: 10.1002/adma.201500127] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 02/24/2015] [Indexed: 05/27/2023]
Abstract
Colloidal nanocrystal frameworks (CNFs) are a modular class of mesostructured porous materials, which are assembled from pre-formed nanocrystal building units using suitably designed block copolymer architecture-directing agents. The functional attributes of these frameworks are determined both by the physiochemical characteristics of the nanocrystal components as well as their ordered arrangements in space. It is noteworthy that their assembly schemes are readily amenable to more than one type of framework component, yielding a multivariate landscape to navigate mesoscale phenomena arising from the coupled interactions of different nanocrystals within the framework. Early reports indicate surprisingly efficient propagation of both matter and energy within and along the surfaces of these frameworks, although there remains much to be learned about the origins of their structural, electronic, and dynamic properties, and how they feed back across multiple length and time scales.
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Affiliation(s)
- Brett A Helms
- The Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA, 94720, USA
| | - Teresa E Williams
- The Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA, 94720, USA
| | - Raffaella Buonsanti
- The Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA, 94720, USA
- Joint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, 2929 7th Street, Berkeley, CA, 94710, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA, 94720, USA
| | - Delia J Milliron
- The Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA, 94720, USA
- McKetta Department of Chemical Engineering, The University of Texas at Austin, 200 E. Dean Keeton Street, Austin, TX, 78712, USA
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Vamvasakis I, Subrahmanyam KS, Kanatzidis MG, Armatas GS. Template-directed assembly of metal-chalcogenide nanocrystals into ordered mesoporous networks. ACS NANO 2015; 9:4419-4426. [PMID: 25871841 DOI: 10.1021/acsnano.5b01014] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Although great progress in the synthesis of porous networks of metal and metal oxide nanoparticles with highly accessible pore surface and ordered mesoscale pores has been achieved, synthesis of assembled 3D mesostructures of metal-chalcogenide nanocrystals is still challenging. In this work we demonstrate that ordered mesoporous networks, which comprise well-defined interconnected metal sulfide nanocrystals, can be prepared through a polymer-templated oxidative polymerization process. The resulting self-assembled mesostructures that were obtained after solvent extraction of the polymer template impart the unique combination of light-emitting metal chalcogenide nanocrystals, three-dimensional open-pore structure, high surface area, and uniform pores. We show that the pore surface of these materials is active and accessible to incoming molecules, exhibiting high photocatalytic activity and stability, for instance, in oxidation of 1-phenylethanol into acetophenone. We demonstrate through appropriate selection of the synthetic components that this method is general to prepare ordered mesoporous materials from metal chalcogenide nanocrystals with various sizes and compositions.
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Affiliation(s)
- Ioannis Vamvasakis
- †Department of Materials Science and Technology, University of Crete, Vassilika Vouton, Heraklion 71003, Crete, Greece
| | - Kota S Subrahmanyam
- ‡Department of Chemistry, Northwester University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Mercouri G Kanatzidis
- ‡Department of Chemistry, Northwester University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- §Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Gerasimos S Armatas
- †Department of Materials Science and Technology, University of Crete, Vassilika Vouton, Heraklion 71003, Crete, Greece
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14
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Moritz M, Geszke-Moritz M. Mesoporous materials as multifunctional tools in biosciences: Principles and applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:114-151. [DOI: 10.1016/j.msec.2014.12.079] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 12/09/2014] [Indexed: 12/17/2022]
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15
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Doris SE, Lynch JJ, Li C, Wills AW, Urban JJ, Helms BA. Mechanistic Insight into the Formation of Cationic Naked Nanocrystals Generated under Equilibrium Control. J Am Chem Soc 2014; 136:15702-10. [DOI: 10.1021/ja508675t] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Sean E. Doris
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron
Road, Berkeley, California 94720, United States
| | - Jared J. Lynch
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron
Road, Berkeley, California 94720, United States
| | - Changyi Li
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron
Road, Berkeley, California 94720, United States
| | - Andrew W. Wills
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron
Road, Berkeley, California 94720, United States
| | - Jeffrey J. Urban
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron
Road, Berkeley, California 94720, United States
| | - Brett A. Helms
- The
Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron
Road, Berkeley, California 94720, United States
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Milliron DJ, Buonsanti R, Llordes A, Helms BA. Constructing functional mesostructured materials from colloidal nanocrystal building blocks. Acc Chem Res 2014; 47:236-46. [PMID: 24004254 DOI: 10.1021/ar400133k] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Through synthesizing colloidal nanocrystals (NCs) in the organic phase, chemists gain fine control over their composition, size, and shape. Strategies for arranging them into ordered superlattices have followed closely behind synthetic advances. Nonetheless, the same hydrophobic ligands that help their assembly also severely limit interactions between adjacent nanocrystals. As a result, examples of nanocrystal-based materials whose functionality derives from their mesoscale structure have lagged well behind advances in synthesis and assembly. In this Account, we describe how recent insights into NC surface chemistry have fueled dramatic progress in functional mesostructures. In these constructs, intimate contact between NCs as well as with heterogeneous components is key in determining macroscopic behavior. The simplest mesoscale assemblies we consider are networks of NCs constructed by in situ replacement of their bulky, insulating surface ligands with small molecules. Transistors are a test bed for understanding conductivity, setting the stage for new functionality. For instance, we demonstrated that by electrochemically charging and discharging networks of plasmonic metal oxide NCs, the transmittance of near infrared light can be strongly and reversibly modulated. When we assemble NCs with heterogeneous components, there is an even greater potential for generating complex functionality. Nanocomposites can exhibit favorable characteristics of their component materials, yet the interaction between components can also have a strong influence. Realizing such opportunities requires an intimate linking of embedded NCs to the surrounding matrix phase. We accomplish this link by coordinating inorganic anionic clusters directly to NC surfaces. By exploiting this connection, we found enhanced ionic conductivity in Ag2S-in-GeS2 nanocrystal-in-glass electrodes. In another example, we also found enhanced optical contrast when linking electrochromic niobium oxide to embedded tin-doped indium oxide (ITO) NCs. These dramatic effects emerge from reconstruction of the inorganic glass immediately adjacent to the NC interface. When co-assembling NCs with block copolymers, direct coordination of the polymer to NC surfaces again opens new opportunities for functional mesoscale constructs. We strip NCs of their native ligands and design block copolymers containing a NC tethering domain that bonds strongly, yet dynamically, to the resulting open coordination sites. This strategy enables their co-assembly at high volume fractions of NCs and leads to well-ordered mesoporous NC networks. We find these architectures to be exceptionally stable under chemical transformations driven by cation insertion, removal, and exchange. These developments offer a modular toolbox for arranging NCs deliberately with respect to heterogeneous elements and open space. We have control over metrics that define such architectures from the atomic scale (bonding and crystal structure) through the mesoscale (crystallite shapes and sizes and pore dimensions). By tuning these parameters and better understanding the interactions between components, we look forward to boundless opportunities to employ mesoscale structure, in tandem with composition, to develop functional materials.
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Affiliation(s)
- Delia J. Milliron
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Raffaella Buonsanti
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Anna Llordes
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Brett A. Helms
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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Rivest JB, Buonsanti R, Pick TE, Zhu L, Lim E, Clavero C, Schaible E, Helms BA, Milliron DJ. Evolution of Ordered Metal Chalcogenide Architectures through Chemical Transformations. J Am Chem Soc 2013; 135:7446-9. [DOI: 10.1021/ja403071w] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jessy B. Rivest
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
| | - Raffaella Buonsanti
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
| | - Teresa E. Pick
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
| | - Lina Zhu
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
| | - Eunhee Lim
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
| | - Cesar Clavero
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
| | - Eric Schaible
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
| | - Brett A. Helms
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
| | - Delia J. Milliron
- The
Molecular Foundry, §The Advanced Light Source, ⊥Environmental Energy Technologies Division, Lawrence Berkeley National Laboratory, Berkeley, California, 94720, United States
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