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Wu L, Li Y, Liu GQ, Yu SH. Polytypic metal chalcogenide nanocrystals. Chem Soc Rev 2024. [PMID: 39212091 DOI: 10.1039/d3cs01095c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
By engineering chemically identical but structurally distinct materials into intricate and sophisticated polytypic nanostructures, which often surpass their pure phase objects and even produce novel physical and chemical properties, exciting applications in the fields of photovoltaics, electronics and photocatalysis can be achieved. In recent decades, various methods have been developed for synthesizing a library of polytypic nanocrystals encompassing IV, III-V and II-VI polytypic semiconductors. The exceptional performances of polytypic metal chalcogenide nanocrystals have been observed, making them highly promising candidates for applications in photonics and electronics. However, achieving high-precision control over the morphology, composition, crystal structure, size, homojunctions, and periodicity of polytypic metal chalcogenide nanostructures remains a significant synthetic challenge. This review article offers a comprehensive overview of recent progress in the synthesis and control of polytypic metal chalcogenide nanocrystals using colloidal synthetic strategies. Starting from a concise introduction on the crystal structures of metal chalcogenides, the subsequent discussion delves into the colloidal synthesis of polytypic metal chalcogenide nanocrystals, followed by an in-depth exploration of the key factors governing polytypic structure construction. Subsequently, we provide comprehensive insights into the physical properties of polytypic metal chalcogenide nanocrystals, which exhibit strong correlations with their applications. Thereafter, we emphasize the significance of polytypic nanostructures in various applications, such as photovoltaics, photocatalysis, transistors, thermoelectrics, stress sensors, and the electrocatalytic hydrogen evolution. Finally, we present a summary of the recent advancements in this research field and provide insightful perspectives on the forthcoming challenges, opportunities, and future research directions.
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Affiliation(s)
- Liang Wu
- Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
| | - Yi Li
- Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
| | - Guo-Qiang Liu
- Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
| | - Shu-Hong Yu
- Department of Chemistry, New Cornerstone Science Laboratory, Institute of Biomimetic Materials & Chemistry, Division of Nanomaterials & Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China.
- Department of Chemistry, Institute of Innovative Materials, Department of Materials Science and Engineering, Southern University of Science and Technology of China, Shenzhen 518055, China.
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2
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Nanocomposite Hydrogels as Functional Extracellular Matrices. Gels 2023; 9:gels9020153. [PMID: 36826323 PMCID: PMC9957407 DOI: 10.3390/gels9020153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 01/31/2023] [Accepted: 02/08/2023] [Indexed: 02/16/2023] Open
Abstract
Over recent years, nano-engineered materials have become an important component of artificial extracellular matrices. On one hand, these materials enable static enhancement of the bulk properties of cell scaffolds, for instance, they can alter mechanical properties or electrical conductivity, in order to better mimic the in vivo cell environment. Yet, many nanomaterials also exhibit dynamic, remotely tunable optical, electrical, magnetic, or acoustic properties, and therefore, can be used to non-invasively deliver localized, dynamic stimuli to cells cultured in artificial ECMs in three dimensions. Vice versa, the same, functional nanomaterials, can also report changing environmental conditions-whether or not, as a result of a dynamically applied stimulus-and as such provide means for wireless, long-term monitoring of the cell status inside the culture. In this review article, we present an overview of the technological advances regarding the incorporation of functional nanomaterials in artificial extracellular matrices, highlighting both passive and dynamically tunable nano-engineered components.
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3
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Karimata A, Khusnutdinova JR. Photo- and triboluminescent pyridinophane Cu complexes: New organometallic tools for mechanoresponsive materials. Dalton Trans 2022; 51:3411-3420. [DOI: 10.1039/d1dt04305f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of mechanoresponsive polymers has emerged as a new, attractive area of research in which changes at the molecular level exert macrolevel effects in the bulk material, and vice...
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4
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Biesold GM, Liang S, Brettmann B, Thadhani N, Kang Z, Lin Z. Tailoring Optical Properties of Luminescent Semiconducting Nanocrystals through Hydrostatic, Anisotropic Static, and Dynamic Pressures. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202008395] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gill M. Biesold
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Shuang Liang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Blair Brettmann
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
- School of Chemical and Biomedical Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Naresh Thadhani
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Zhitao Kang
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
- Georgia Tech Research Institute Georgia Institute of Technology Atlanta Georgia 30332 USA
| | - Zhiqun Lin
- School of Materials Science and Engineering Georgia Institute of Technology Atlanta Georgia 30332 USA
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5
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Biesold GM, Liang S, Brettmann B, Thadhani N, Kang Z, Lin Z. Tailoring Optical Properties of Luminescent Semiconducting Nanocrystals through Hydrostatic, Anisotropic Static, and Dynamic Pressures. Angew Chem Int Ed Engl 2021; 60:9772-9788. [PMID: 32621404 DOI: 10.1002/anie.202008395] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Indexed: 12/25/2022]
Abstract
Luminescent semiconductor nanocrystals are a fascinating class of materials because of their size-dependent emissions. Numerous past studies have demonstrated that semiconductor nanoparticles with radii smaller than their Bohr radius experience quantum confinement and thus size-dependent emissions. Exerting pressure on these nanoparticles represents an additional, more dynamic, strategy to alter their size and shift their emission. The application of pressure results in the lattices becoming strained and the electronic structure altered. In this Minireview, colloidal semiconductor nanocrystals are first introduced. The effects of uniform hydrostatic pressure on the optical properties of metal halide perovskite (ABX3 ), II-VI, III-V, and IV-VI semiconductor nanocrystals are then examined. The optical properties of semiconductor nanocrystals under static and dynamic anisotropic pressure are then summarized. Finally, future research directions and applications utilizing the pressure-dependent optical properties of semiconductor nanocrystals are discussed.
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Affiliation(s)
- Gill M Biesold
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
| | - Shuang Liang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
| | - Blair Brettmann
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA.,School of Chemical and Biomedical Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
| | - Naresh Thadhani
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
| | - Zhitao Kang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA.,Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA
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6
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Filonenko GA, Lugger JAM, Liu C, van Heeswijk EPA, Hendrix MMRM, Weber M, Müller C, Hensen EJM, Sijbesma RP, Pidko EA. Tracking Local Mechanical Impact in Heterogeneous Polymers with Direct Optical Imaging. Angew Chem Int Ed Engl 2018; 57:16385-16390. [PMID: 30182453 PMCID: PMC6348422 DOI: 10.1002/anie.201809108] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Indexed: 11/22/2022]
Abstract
Structural heterogeneity defines the properties of many functional polymers and it is often crucial for their performance and ability to withstand mechanical impact. Such heterogeneity, however, poses a tremendous challenge for characterization of these materials and limits our ability to design them rationally. Herein we present a practical methodology capable of resolving the complex mechanical behavior and tracking mechanical impact in discrete phases of segmented polyurethane-a typical example of a structurally complex polymer. Using direct optical imaging of photoluminescence produced by a small-molecule organometallic mechano-responsive sensor we observe in real time how polymer phases dissipate energy, restructure, and breakdown upon mechanical impact. Owing to its simplicity and robustness, this method has potential in describing the evolution of complex soft-matter systems for which global characterization techniques fall short of providing molecular-level insight.
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Affiliation(s)
- Georgy A. Filonenko
- Inorganic Systems Engineering groupDepartment of Chemical EngineeringDelft University of Technology2629HZDelftThe Netherlands
| | - Jody A. M. Lugger
- Institute for Complex Molecular SystemsEindhoven University of Technology5600 MBEindhovenThe Netherlands
| | - Chong Liu
- Inorganic Systems Engineering groupDepartment of Chemical EngineeringDelft University of Technology2629HZDelftThe Netherlands
| | - Ellen P. A. van Heeswijk
- Department of Chemical Engineering and ChemistryEindhoven University of Technology5600 MBEindhovenThe Netherlands
| | - Marco M. R. M. Hendrix
- Department of Chemical Engineering and ChemistryEindhoven University of Technology5600 MBEindhovenThe Netherlands
| | - Manuela Weber
- Institut für Chemie und BiochemieFreie Universität Berlin14195BerlinGermany
| | - Christian Müller
- Institut für Chemie und BiochemieFreie Universität Berlin14195BerlinGermany
| | - Emiel J. M. Hensen
- Department of Chemical Engineering and ChemistryEindhoven University of Technology5600 MBEindhovenThe Netherlands
| | - Rint P. Sijbesma
- Institute for Complex Molecular SystemsEindhoven University of Technology5600 MBEindhovenThe Netherlands
| | - Evgeny A. Pidko
- Inorganic Systems Engineering groupDepartment of Chemical EngineeringDelft University of Technology2629HZDelftThe Netherlands
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Ou Z, Song X, Huang W, Jiang X, Qu S, Wang Q, Braun PV, Moore JS, Li X, Chen Q. Colloidal Metal-Organic Framework Hexapods Prepared from Postsynthesis Etching with Enhanced Catalytic Activity and Rollable Packing. ACS APPLIED MATERIALS & INTERFACES 2018; 10:40990-40995. [PMID: 30398328 DOI: 10.1021/acsami.8b17477] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Recent studies on the effect of particle shapes have led to extensive applications of anisotropic colloids as complex materials building blocks. Although much research has been devoted to colloids of convex polyhedral shapes, branched colloids remain largely underexplored because of limited synthesis strategies. Here we achieved the preparation of metal-organic framework (MOF) colloids in a hexapod shape, not directly from growth but from postsynthesis etching of truncated rhombic dodecahedron (TRD) parent particles. To understand the branch development, we used in situ optical microscopy to track the local surface curvature evolution of the colloids as well as facet-dependent etching rate. The hexapods show unique properties, such as improved catalytic activity in a model Knoevenagel reaction likely due to enhanced access to active sites, and the assembly into open structures which can be easily integrated with a self-rolled-up nanomembrane structure. Both the postsynthesis etching and the hexapod colloids demonstrated here show a new route of engineering micrometer-sized building blocks with exotic shapes and intrinsic functionalities originated from the molecular structure of materials.
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8
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Filonenko GA, Lugger JAM, Liu C, van Heeswijk EPA, Hendrix MMRM, Weber M, Müller C, Hensen EJM, Sijbesma RP, Pidko EA. Tracking Local Mechanical Impact in Heterogeneous Polymers with Direct Optical Imaging. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809108] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Georgy A. Filonenko
- Inorganic Systems Engineering group; Department of Chemical Engineering; Delft University of Technology; 2629 HZ Delft The Netherlands
| | - Jody A. M. Lugger
- Institute for Complex Molecular Systems; Eindhoven University of Technology; 5600 MB Eindhoven The Netherlands
| | - Chong Liu
- Inorganic Systems Engineering group; Department of Chemical Engineering; Delft University of Technology; 2629 HZ Delft The Netherlands
| | - Ellen P. A. van Heeswijk
- Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; 5600 MB Eindhoven The Netherlands
| | - Marco M. R. M. Hendrix
- Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; 5600 MB Eindhoven The Netherlands
| | - Manuela Weber
- Institut für Chemie und Biochemie; Freie Universität Berlin; 14195 Berlin Germany
| | - Christian Müller
- Institut für Chemie und Biochemie; Freie Universität Berlin; 14195 Berlin Germany
| | - Emiel J. M. Hensen
- Department of Chemical Engineering and Chemistry; Eindhoven University of Technology; 5600 MB Eindhoven The Netherlands
| | - Rint P. Sijbesma
- Institute for Complex Molecular Systems; Eindhoven University of Technology; 5600 MB Eindhoven The Netherlands
| | - Evgeny A. Pidko
- Inorganic Systems Engineering group; Department of Chemical Engineering; Delft University of Technology; 2629 HZ Delft The Netherlands
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9
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Raja SN, Ye X, Jones MR, Lin L, Govindjee S, Ritchie RO. Microscopic mechanisms of deformation transfer in high dynamic range branched nanoparticle deformation sensors. Nat Commun 2018; 9:1155. [PMID: 29559619 PMCID: PMC5861061 DOI: 10.1038/s41467-018-03396-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 02/09/2018] [Indexed: 11/19/2022] Open
Abstract
Nanoscale stress sensing is of crucial importance to biomechanics and other fields. An ideal stress sensor would have a large dynamic range to function in a variety of materials spanning orders of magnitude of local stresses. Here we show that tetrapod quantum dots (tQDs) exhibit excellent sensing versatility with stress-correlated signatures in a multitude of polymers. We further show that tQDs exhibit pressure coefficients, which increase with decreasing polymer stiffness, and vary >3 orders of magnitude. This high dynamic range allows tQDs to sense in matrices spanning >4 orders of magnitude in Young's modulus, ranging from compliant biological levels (~100 kPa) to stiffer structural polymers (~5 GPa). We use ligand exchange to tune filler-matrix interfaces, revealing that inverse sensor response scaling is maintained upon significant changes to polymer-tQD interface chemistry. We quantify and explore mechanisms of polymer-tQD strain transfer. An analytical model based on Mori-Tanaka theory presents agreement with observed trends.
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Affiliation(s)
- Shilpa N Raja
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Department of Materials, Science and Engineering, University of California at Berkeley, Berkeley, CA, 94720, USA
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Xingchen Ye
- Department of Chemistry, University of California at Berkeley, Berkeley, CA, 94720, USA
- Department of Chemistry, Indiana University-Bloomington, Bloomington, IN, 47405, USA
| | - Matthew R Jones
- Department of Chemistry, University of California at Berkeley, Berkeley, CA, 94720, USA
- Department of Chemistry, Rice University, Houston, TX, 77251, USA
| | - Liwei Lin
- Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA, 94720, USA
| | - Sanjay Govindjee
- Department of Civil and Environmental Engineering, University of California at Berkeley, Berkeley, CA, 94720, USA.
| | - Robert O Ritchie
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
- Department of Materials, Science and Engineering, University of California at Berkeley, Berkeley, CA, 94720, USA.
- Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA, 94720, USA.
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10
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Filonenko GA, Khusnutdinova JR. Dynamic Phosphorescent Probe for Facile and Reversible Stress Sensing. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1700563. [PMID: 28318067 DOI: 10.1002/adma.201700563] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 02/21/2017] [Indexed: 06/06/2023]
Abstract
Dynamic phosphorescent copper complex incorporated into the main chain of polyurethanes produces a facile and reversible response to tensile stress. In contrast to common deformation sensors, the applied stress does not lead to bond scission, or alters the phosphor structure. The suppression of dynamics responsible for the nonradiative relaxation is found to be the major pathway governing stress response. As a result, the response of dynamic phosphor described in this work is stress specific. Compared to initial unloaded state, a nearly twofold increase of photoluminescence intensity occurs in response to a 5-35 MPa stress applied to pristine metalated polymers or their blends with various polyurethanes. Finally, the dynamic sensor proves useful for mapping stress distribution patterns and tracking dynamic phenomena in polyurethanes using simple optical imaging techniques.
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Affiliation(s)
- Georgy A Filonenko
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan
| | - Julia R Khusnutdinova
- Coordination Chemistry and Catalysis Unit, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan
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11
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Fischer T, Stöttinger S, Hinze G, Bottin A, Hu N, Basché T. Single Semiconductor Nanocrystals under Compressive Stress: Reversible Tuning of the Emission Energy. NANO LETTERS 2017; 17:1559-1563. [PMID: 28151680 DOI: 10.1021/acs.nanolett.6b04689] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The photoluminescence of individual CdSe/CdS/ZnS core/shell nanocrystals has been investigated under external forces. After mutual alignment of a correlative atomic force and confocal microscope, individual particles were colocalized and exposed to a series of force cycles by using the tip of the AFM cantilever as a nanoscale piston. Thus, force-dependent changes of photophysical properties could be tracked on a single particle level. Remarkably, individual nanocrystals either shifted to higher or to lower emission energies with no indications of multiple emission lines under applied force. The direction and magnitude of these reversible spectral shifts depend on the orientation of nanocrystal axes relative to the external anisotropic force. Maximum pressures derived from the applied forces within a simple contact-mechanical model lie in the GPa range, comparable to values typically emerging in diamond anvil cells. Average spectral shift parameters of -3.5 meV/GPa and 3.0 meV/GPa are found for red- and blue-shifting species, respectively. Our results clearly demonstrate that the emission energy of single nanocrystals can be reversibly tuned over an appreciable wavelength range without degradation of their performance which appears as a promising feature with respect to tunable single photon sources or the creation of coherently coupled particle dimers.
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Affiliation(s)
- Tobias Fischer
- Institute of Physical Chemistry, Johannes Gutenberg-University , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Sven Stöttinger
- Institute of Physical Chemistry, Johannes Gutenberg-University , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Gerald Hinze
- Institute of Physical Chemistry, Johannes Gutenberg-University , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Anne Bottin
- Institute of Physical Chemistry, Johannes Gutenberg-University , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Nan Hu
- Institute of Physical Chemistry, Johannes Gutenberg-University , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Thomas Basché
- Institute of Physical Chemistry, Johannes Gutenberg-University , Duesbergweg 10-14, 55128 Mainz, Germany
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12
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Koc MA, Raja SN, Hanson LA, Nguyen SC, Borys NJ, Powers AS, Wu S, Takano K, Swabeck JK, Olshansky JH, Lin L, Ritchie RO, Alivisatos AP. Characterizing Photon Reabsorption in Quantum Dot-Polymer Composites for Use as Displacement Sensors. ACS NANO 2017; 11:2075-2084. [PMID: 28110520 DOI: 10.1021/acsnano.6b08277] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The reabsorption of photoluminescence within a medium, an effect known as the inner filter effect (IFE), has been well studied in solutions, but has garnered less attention in regards to solid-state nanocomposites. Photoluminescence from a quantum dot (QD) can selectively excite larger QDs around it resulting in a net red-shift in the reemitted photon. In CdSe/CdS core/shell QD-polymer nanocomposites, we observe a large spectral red-shift of over a third of the line width of the photoluminescence of the nanocomposites over a distance of 100 μm resulting from the IFE. Unlike fluorescent dyes, which do not show a large IFE red-shift, QDs have a component of inhomogeneous broadening that originates from their size distribution and quantum confinement. By controlling the photoluminescence broadening as well as the sample dispersion and concentration, we show that the magnitude of the IFE within the nanocomposite can be tuned. We further demonstrate that this shift can be exploited in order to spectroscopically monitor the vertical displacement of a nanocomposite in a fluorescence microscope. Large energetic shifts in the measured emission with displacement can be maximized, resulting in a displacement sensor with submicrometer resolution. We further show that the composite can be easily attached to biological samples and is able to measure deformations with high temporal and spatial precision.
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Affiliation(s)
- Matthew A Koc
- Department of Chemistry, University of California , Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Shilpa N Raja
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States
| | - Lindsey A Hanson
- Department of Chemistry, University of California , Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Son C Nguyen
- Department of Chemistry, University of California , Berkeley, California 94720, United States
- The Hamburg Centre for Ultrafast Imaging, University of Hamburg , Luruper Chaussee 149, 22761 Hamburg, Germany
| | - Nicholas J Borys
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Molecular Foundry, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Alexander S Powers
- Department of Chemistry, University of California , Berkeley, California 94720, United States
| | - Siva Wu
- Biological Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Kaori Takano
- Department of Chemistry, University of California , Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- JX Nippon Oil & Energy Corporation, 8 , Chidori-cho, Naka-ku, Yokohama-shi, Kanagawa 231-0815, Japan
| | - Joseph K Swabeck
- Department of Chemistry, University of California , Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Jacob H Olshansky
- Department of Chemistry, University of California , Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Liwei Lin
- Department of Mechanical Engineering, University of California , Berkeley, California 94720, United States
| | - Robert O Ritchie
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States
- Department of Mechanical Engineering, University of California , Berkeley, California 94720, United States
| | - A Paul Alivisatos
- Department of Chemistry, University of California , Berkeley, California 94720, United States
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Department of Materials Science and Engineering, University of California , Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute , Berkeley, California 94720, United States
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13
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Pavlopoulos NG, Dubose JT, Liu Y, Huang X, Pinna N, Willinger MG, Lian T, Char K, Pyun J. Type I vs. quasi-type II modulation in CdSe@CdS tetrapods: ramifications for noble metal tipping. CrystEngComm 2017. [DOI: 10.1039/c7ce01558e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on noble metal tipping of heterostructured nanocrystals (NCs) of CdSe@CdS tetrapods (TPs) as a chemical reaction to manifest energetic differences between type I and quasi-type II heterojunctions.
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Affiliation(s)
| | - Jeffrey T. Dubose
- Department of Chemistry and Biochemistry
- University of Arizona
- Tucson
- USA
| | - Yawei Liu
- Department of Chemistry
- Emory University
- Atlanta
- USA
| | - Xing Huang
- Institut fur Chemie
- Humboldt-Universitat zu Berlin
- 12489 Berlin
- Germany
| | - Nicola Pinna
- Department of Inorganic Chemistry
- Fritz Haber Institute of the Max Planck Society
- Berlin
- Germany
| | | | | | - Kookheon Char
- World Class University Program for Chemical Convergence for Energy and Environment
- School of Chemical and Biological Engineering
- Seoul National University
- Seoul 151-744
- Korea
| | - Jeffrey Pyun
- Department of Chemistry and Biochemistry
- University of Arizona
- Tucson
- USA
- World Class University Program for Chemical Convergence for Energy and Environment
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14
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Raja SN, Bekenstein Y, Koc MA, Fischer S, Zhang D, Lin L, Ritchie RO, Yang P, Alivisatos AP. Encapsulation of Perovskite Nanocrystals into Macroscale Polymer Matrices: Enhanced Stability and Polarization. ACS APPLIED MATERIALS & INTERFACES 2016; 8:35523-35533. [PMID: 27991752 DOI: 10.1021/acsami.6b09443] [Citation(s) in RCA: 189] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Lead halide perovskites hold promise for photonic devices, due to their superior optoelectronic properties. However, their use is limited by poor stability and toxicity. We demonstrate enhanced water and light stability of high-surface-area colloidal perovskite nanocrystals by encapsulation of colloidal CsPbBr3 quantum dots into matched hydrophobic macroscale polymeric matrices. This is achieved by mixing the quantum dots with presynthesized high-molecular-weight polymers. We monitor the photoluminescence quantum yield of the perovskite-polymer nanocomposite films under water-soaking for the first time, finding no change even after >4 months of continuous immersion in water. Furthermore, photostability is greatly enhanced in the macroscale polymer-encapsulated nanocrystal perovskites, which sustain >1010 absorption events per quantum dot prior to photodegradation, a significant threshold for potential device use. Control of the quantum dot shape in these thin-film polymer composite enables color tunability via strong quantum-confinement in nanoplates and significant room temperature polarized emission from perovskite nanowires. Not only does the high-molecular-weight polymer protect the perovskites from the environment but also no escaped lead was detected in water that was in contact with the encapsulated perovskites for months. Our ligand-passivated perovskite-macroscale polymer composites provide a robust platform for diverse photonic applications.
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Affiliation(s)
- Shilpa N Raja
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Yehonadav Bekenstein
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute , Berkeley, California 94720, United States
| | - Matthew A Koc
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Stefan Fischer
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Dandan Zhang
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | | | - Robert O Ritchie
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Peidong Yang
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute , Berkeley, California 94720, United States
| | - A Paul Alivisatos
- Materials Sciences Division, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
- Kavli Energy NanoScience Institute , Berkeley, California 94720, United States
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