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Yun Q, Ge Y, Shi Z, Liu J, Wang X, Zhang A, Huang B, Yao Y, Luo Q, Zhai L, Ge J, Peng Y, Gong C, Zhao M, Qin Y, Ma C, Wang G, Wa Q, Zhou X, Li Z, Li S, Zhai W, Yang H, Ren Y, Wang Y, Li L, Ruan X, Wu Y, Chen B, Lu Q, Lai Z, He Q, Huang X, Chen Y, Zhang H. Recent Progress on Phase Engineering of Nanomaterials. Chem Rev 2023. [PMID: 37962496 DOI: 10.1021/acs.chemrev.3c00459] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
As a key structural parameter, phase depicts the arrangement of atoms in materials. Normally, a nanomaterial exists in its thermodynamically stable crystal phase. With the development of nanotechnology, nanomaterials with unconventional crystal phases, which rarely exist in their bulk counterparts, or amorphous phase have been prepared using carefully controlled reaction conditions. Together these methods are beginning to enable phase engineering of nanomaterials (PEN), i.e., the synthesis of nanomaterials with unconventional phases and the transformation between different phases, to obtain desired properties and functions. This Review summarizes the research progress in the field of PEN. First, we present representative strategies for the direct synthesis of unconventional phases and modulation of phase transformation in diverse kinds of nanomaterials. We cover the synthesis of nanomaterials ranging from metal nanostructures such as Au, Ag, Cu, Pd, and Ru, and their alloys; metal oxides, borides, and carbides; to transition metal dichalcogenides (TMDs) and 2D layered materials. We review synthesis and growth methods ranging from wet-chemical reduction and seed-mediated epitaxial growth to chemical vapor deposition (CVD), high pressure phase transformation, and electron and ion-beam irradiation. After that, we summarize the significant influence of phase on the various properties of unconventional-phase nanomaterials. We also discuss the potential applications of the developed unconventional-phase nanomaterials in different areas including catalysis, electrochemical energy storage (batteries and supercapacitors), solar cells, optoelectronics, and sensing. Finally, we discuss existing challenges and future research directions in PEN.
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Affiliation(s)
- Qinbai Yun
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
- Department of Chemical and Biological Engineering & Energy Institute, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Yiyao Ge
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Zhenyu Shi
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Jiawei Liu
- Institute of Sustainability for Chemicals, Energy and Environment, Agency for Science, Technology and Research (A*STAR), Singapore, 627833, Singapore
| | - Xixi Wang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - An Zhang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Biao Huang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
- Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
| | - Yao Yao
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Qinxin Luo
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Li Zhai
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
- Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
| | - Jingjie Ge
- Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong SAR
| | - Yongwu Peng
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Chengtao Gong
- College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, China
| | - Meiting Zhao
- Institute of Molecular Aggregation Science, Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, China
| | - Yutian Qin
- Institute of Molecular Aggregation Science, Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin 300072, China
| | - Chen Ma
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Gang Wang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Qingbo Wa
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Xichen Zhou
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Zijian Li
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Siyuan Li
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Wei Zhai
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Hua Yang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Yi Ren
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Yongji Wang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Lujing Li
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Xinyang Ruan
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Yuxuan Wu
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
| | - Bo Chen
- State Key Laboratory of Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials, School of Chemistry and Life Sciences, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
| | - Qipeng Lu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Zhuangchai Lai
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong SAR, China
| | - Qiyuan He
- Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong SAR, China
| | - Xiao Huang
- Institute of Advanced Materials (IAM), School of Flexible Electronics (SoFE), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing 211816, China
| | - Ye Chen
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, Hong Kong, China
| | - Hua Zhang
- Department of Chemistry, City University of Hong Kong, Kowloon, Hong Kong, China
- Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), City University of Hong Kong, Hong Kong, China
- Shenzhen Research Institute, City University of Hong Kong, Shenzhen 518057, China
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Mei S, Guo Y, Lin X, Dong H, Sun LD, Li K, Yan CH. Experimental and Simulation Insights into Local Structure and Luminescence Evolution in Eu 3+-Doped Nanocrystals under High Pressure. J Phys Chem Lett 2020; 11:3515-3520. [PMID: 32293899 DOI: 10.1021/acs.jpclett.0c00895] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Tremendous effort has been devoted to tailoring structure-correlated properties, especially for the luminescence of lanthanide nanocrystals (NCs). High pressure has been demonstrated as a decent way to tune the performance of lanthanide NCs; however, little attention has been paid to the local structure evolution accompanied by extreme compression and its effect on luminescence. Here, we tailor the local structure around lanthanide ions with pressure in β-NaGdF4 NCs, in which Eu3+ ions were doped as optical probes for local structure for the sensitive electric dipole transition. As the pressure increases, the intensity ratio of the 5D0 → 7F2 to 5D0 → 7F1 transition decreases monotonically from 2.04 to 0.81, implying a higher local symmetry around Eu3+ ions from compression. In situ X-ray diffraction demonstrates that the sample maintains the hexagonal structure up to 33.5 GPa, and density functional theory calculations reveal the tendency of the local structure to vary under high pressure.
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Affiliation(s)
- Sheng Mei
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Yu Guo
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xiaohuan Lin
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
| | - Hao Dong
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Ling-Dong Sun
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Kuo Li
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
| | - Chun-Hua Yan
- Beijing National Laboratory for Molecular Sciences, State Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory in Rare Earth Materials and Bioinorganic Chemistry, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
- College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China
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Bai F, Bian K, Huang X, Wang Z, Fan H. Pressure Induced Nanoparticle Phase Behavior, Property, and Applications. Chem Rev 2019; 119:7673-7717. [PMID: 31059242 DOI: 10.1021/acs.chemrev.9b00023] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Nanoparticle (NP) high pressure behavior has been extensively studied over the years. In this review, we summarize recent progress on the studies of pressure induced NP phase behavior, property, and applications. This review starts with a brief overview of high pressure characterization techniques, coupled with synchrotron X-ray scattering, Raman, fluorescence, and absorption. Then, we survey the pressure induced phase transition of NP atomic crystal structure including size dependent phase transition, amorphization, and threshold pressures using several typical NP material systems as examples. Next, we discuss the pressure induced phase transition of NP mesoscale structures including topics on pressure induced interparticle separation distance, NP coupling, and NP coalescence. Pressure induced new properties and applications in different NP systems are highlighted. Finally, outlooks with future directions are discussed.
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Affiliation(s)
- Feng Bai
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng 475004, P. R. China
| | - Kaifu Bian
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
| | - Xin Huang
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14853, United States
| | - Zhongwu Wang
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, New York 14853, United States
| | - Hongyou Fan
- Sandia National Laboratories, Albuquerque, New Mexico 87185, United States.,Department of Chemical and Biological Engineering, Albuquerque, University of New Mexico, Albuquerque, New Mexico 87106, United States.,Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, United States
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Wei W, Bai F, Fan H. Surfactant-Assisted Cooperative Self-Assembly of Nanoparticles into Active Nanostructures. iScience 2019; 11:272-293. [PMID: 30639850 PMCID: PMC6327881 DOI: 10.1016/j.isci.2018.12.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 12/05/2018] [Accepted: 12/20/2018] [Indexed: 02/01/2023] Open
Abstract
Nanoparticles (NPs) of controlled size, shape, and composition are important building blocks for the next generation of devices. There are numerous recent examples of organizing uniformly sized NPs into ordered arrays or superstructures in processes such as solvent evaporation, heterogeneous solution assembly, Langmuir-Blodgett receptor-ligand interactions, and layer-by-layer assembly. This review summarizes recent progress in the development of surfactant-assisted cooperative self-assembly method using amphiphilic surfactants and NPs to synthesize new classes of highly ordered active nanostructures. Driven by cooperative interparticle interactions, surfactant-assisted NP nucleation and growth results in optically and electrically active nanomaterials with hierarchical structure and function. How the approach works with nanoscale materials of different dimensions into active nanostructures is discussed in details. Some applications of these self-assembled nanostructures in the areas of nanoelectronics, photocatalysis, and biomedicine are highlighted. Finally, we conclude with the current research progress and perspectives on the challenges and some future directions.
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Affiliation(s)
- Wenbo Wei
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China
| | - Feng Bai
- Key Laboratory for Special Functional Materials of Ministry of Education, National & Local Joint Engineering Research Center for High-efficiency Display and Lighting Technology, School of Materials Science and Engineering, Collaborative Innovation Center of Nano Functional Materials and Applications, Henan University, Kaifeng 475004, China.
| | - Hongyou Fan
- Department of Chemical and Biological Engineering, The University of New Mexico, Albuquerque, NM 87131, USA; Advanced Materials Laboratory, Sandia National Laboratories, Albuquerque, NM 87106, USA; Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, NM 87185, USA.
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Liu G, Yan C, Xue ZJ, Liu C, Xu G, Wang T. A guard to reduce the accidental oxidation of PbTe nanocrystals. NANOSCALE 2018; 10:12284-12290. [PMID: 29946621 DOI: 10.1039/c8nr02776e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the synthesis of lead telluride nanocrystals (PbTe NCs), oxidized PbTe is commonly regarded as a waste material as this will reduce the performance of pure PbTe NCs. The waste is normally thrown away, leading to potential environment risks and is less economical in terms of atom usage. Conventional anti-oxidation methods such as inert gas flow or sealed systems cannot deal with leaking or accidental contamination. To solve this problem, by simulating accidental oxidation, we utilized a cheap and easily-performed strategy to reduce the oxidation to a very low level. Further analysis indicates that this anti-oxidation effect should be due to interactions between the double bonds from the coating ligands and the extended π bonds from the benzene rings. This strategy increases the synthesis efficiency of the reactants and reduces the environmental pollution risk.
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Affiliation(s)
- Gang Liu
- Beijing Municipal Key Lab of Advanced Energy Materials and Technology, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
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Structural Phase Transition and Compressibility of CaF2 Nanocrystals under High Pressure. CRYSTALS 2018. [DOI: 10.3390/cryst8050199] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Wang Y, Li X, Xu M, Wang K, Zhu H, Zhao W, Yan J, Zhang Z. Pressure induced photoluminescence modulation in a wide range and synthesis of monodispersed ternary AgCuS nanocrystal based on Ag 2S nanocrystals. NANOSCALE 2018; 10:2577-2587. [PMID: 29350235 DOI: 10.1039/c7nr08369f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Binary Ag2S nanocrystals (NCs) have many potential optical applications because of their low toxicity, narrow direct band gaps and near-infrared photoluminescence (PL) with high emission efficiency. However, due to its small exciton Bohr radius (2.2 nm), the PL spectra of Ag2S NCs can only be modulated below ∼1200 nm with increasing particle size. Meanwhile, ternary silver copper chalcogenides (AgCuX, X = S, Se) have also attracted increased attention in recent years. Temperature-dependent structural phase transformation leads electrical transport to exhibit fascinating transitions between p and n type conduction, which makes AgCuS and AgCuSe ideal materials for diode or transistor devices. Nevertheless, the traditional method to synthesize these materials is mainly through melting the mixture of Ag, Cu and S/Se powder under extremely high reaction temperatures (973-1373 K) and long reaction time, forming a bulk product. Therefore, the synthesis of high quality monodispersed and size-tunable AgCuS or AgCuSe NCs is still a challenge. To address these issues, in this paper, we report using Ag2S NCs as a template, a method to synthesize monodispersed and size-tunable β-AgCuS NCs via ion exchange and diffusion processes. Similarly, monodispersed β-AgCuSe NCs were also synthesized by this simple and reproducible strategy. This synthetic method opens new avenues for investigating the size-, morphology- and temperature-dependent phase transitions of these ternary AgCuS and AgCuSe materials. Thus, the corresponding electrical transport between p and n type conduction can be studied in the future. Furthermore, we systematically investigated the pressure-dependent PL properties and band gap modulation of monodispersed Ag2S NCs using in situ high pressure PL and absorption spectroscopy. We found that the PL peak of 6.0 nm for Ag2S NCs could be easily adjusted from ∼1200 to 1900 nm with increasing pressure from 0 to 5.1 GPa, which greatly extends the wavelength range of the PL peak beyond that of other approaches.
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Affiliation(s)
- Yingnan Wang
- School of Information Science and Technology, Northwest University, Xi'an, 710127, China.
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Yin T, Fang Y, Chong WK, Ming KT, Jiang S, Li X, Kuo JL, Fang J, Sum TC, White TJ, Yan J, Shen ZX. High-Pressure-Induced Comminution and Recrystallization of CH 3 NH 3 PbBr 3 Nanocrystals as Large Thin Nanoplates. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:1705017. [PMID: 29178658 DOI: 10.1002/adma.201705017] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 09/25/2017] [Indexed: 06/07/2023]
Abstract
High pressure (HP) can drive the direct sintering of nanoparticle assemblies for Ag/Au, CdSe/PbS nanocrystals (NCs). Instead of direct sintering for the conventional nanocrystals, this study experimentally observes for the first time high-pressure-induced comminution and recrystallization of organic-inorganic hybrid perovskite nanocrystals into highly luminescent nanoplates with a shorter carrier lifetime. Such novel pressure response is attributed to the unique structural nature of hybrid perovskites under high pressure: during the drastic cubic-orthorhombic structural transformation at ≈2 GPa, (301) the crystal plane fully occupied by organic molecules possesses a higher surface energy, triggering the comminution of nanocrystals into nanoslices along such crystal plane. Beyond bulk perovskites, in which pressure-induced modifications on crystal structures and functional properties will disappear after pressure release, the pressure-formed variants, i.e., large (≈100 nm) and thin (<10 nm) perovskite nanoplates, are retained and these exhibit simultaneous photoluminescence emission enhancing (a 15-fold enhancement in the photoluminescence) and carrier lifetime shortening (from ≈18.3 ± 0.8 to ≈7.6 ± 0.5 ns) after releasing of pressure from 11 GPa. This pressure-induced comminution of hybrid perovskite NCs and a subsequent amorphization-recrystallization treatment offer the possibilities of engineering the advanced hybrid perovskites with specific properties.
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Affiliation(s)
- Tingting Yin
- Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371
| | - Yanan Fang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798
| | - Wee Kiang Chong
- Energy Research Institute @ NTU, ERI@N, Interdisciplinary Graduate School, Nanyang Technological University, Singapore, 639798
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Koh Teck Ming
- ERI@N, Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553
| | - Shaojie Jiang
- Materials Science and Engineering Program State University of New York at Binghamton Binghamton, NY, 13902, USA
| | - Xianglin Li
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, 10617, Taiwan
| | - Jiye Fang
- Materials Science and Engineering Program State University of New York at Binghamton Binghamton, NY, 13902, USA
| | - Tze Chien Sum
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
| | - Timothy J White
- School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798
| | - Jiaxu Yan
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
- Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergistic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (Nanjing Tech), 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Ze Xiang Shen
- Centre for Disruptive Photonic Technologies, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371
- Division of Physics and Applied Physics, School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, Singapore, 637371
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Superfast assembly and synthesis of gold nanostructures using nanosecond low-temperature compression via magnetic pulsed power. Nat Commun 2017; 8:14778. [PMID: 28300067 PMCID: PMC5357312 DOI: 10.1038/ncomms14778] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Accepted: 01/31/2017] [Indexed: 11/08/2022] Open
Abstract
Gold nanostructured materials exhibit important size- and shape-dependent properties that enable a wide variety of applications in photocatalysis, nanoelectronics and phototherapy. Here we show the use of superfast dynamic compression to synthesize extended gold nanostructures, such as nanorods, nanowires and nanosheets, with nanosecond coalescence times. Using a pulsed power generator, we ramp compress spherical gold nanoparticle arrays to pressures of tens of GPa, demonstrating pressure-driven assembly beyond the quasi-static regime of the diamond anvil cell. Our dynamic magnetic ramp compression approach produces smooth, shockless (that is, isentropic) one-dimensional loading with low-temperature states suitable for nanostructure synthesis. Transmission electron microscopy clearly establishes that various gold architectures are formed through compressive mesoscale coalescences of spherical gold nanoparticles, which is further confirmed by in-situ synchrotron X-ray studies and large-scale simulation. This nanofabrication approach applies magnetically driven uniaxial ramp compression to mimic established embossing and imprinting processes, but at ultra-short (nanosecond) timescales.
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Jiang S, Fang Y, Li R, Xiao H, Crowley J, Wang C, White TJ, Goddard WA, Wang Z, Baikie T, Fang J. Pressure‐Dependent Polymorphism and Band‐Gap Tuning of Methylammonium Lead Iodide Perovskite. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601788] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shaojie Jiang
- Materials Science and Engineering Program State University of New York at Binghamton Binghamton NY 13902 USA
| | - Yanan Fang
- Energy Research Institute@NTU (ERI@N) Nanyang Technological University 50 Nanyang Drive Singapore 637553 Republic of Singapore
| | - Ruipeng Li
- Cornell High Energy Synchrotron Source Cornell University Ithaca NY 14853 USA
| | - Hai Xiao
- Materials and Process Simulation Center (MSC) and Joint Center for Artificial Photosynthesis (JCAP) California Institute of Technology Pasadena CA 91125 USA
| | - Jason Crowley
- Materials and Process Simulation Center (MSC) and Joint Center for Artificial Photosynthesis (JCAP) California Institute of Technology Pasadena CA 91125 USA
| | - Chenyu Wang
- Department of Chemistry State University of New York at Binghamton Binghamton NY 13902 USA
| | - Timothy J. White
- School of Materials Science and Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 Republic of Singapore
| | - William A. Goddard
- Materials and Process Simulation Center (MSC) and Joint Center for Artificial Photosynthesis (JCAP) California Institute of Technology Pasadena CA 91125 USA
| | - Zhongwu Wang
- Cornell High Energy Synchrotron Source Cornell University Ithaca NY 14853 USA
| | - Tom Baikie
- Energy Research Institute@NTU (ERI@N) Nanyang Technological University 50 Nanyang Drive Singapore 637553 Republic of Singapore
| | - Jiye Fang
- Materials Science and Engineering Program State University of New York at Binghamton Binghamton NY 13902 USA
- Department of Chemistry State University of New York at Binghamton Binghamton NY 13902 USA
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11
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Jiang S, Fang Y, Li R, Xiao H, Crowley J, Wang C, White TJ, Goddard WA, Wang Z, Baikie T, Fang J. Pressure‐Dependent Polymorphism and Band‐Gap Tuning of Methylammonium Lead Iodide Perovskite. Angew Chem Int Ed Engl 2016; 55:6540-4. [DOI: 10.1002/anie.201601788] [Citation(s) in RCA: 128] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Shaojie Jiang
- Materials Science and Engineering Program State University of New York at Binghamton Binghamton NY 13902 USA
| | - Yanan Fang
- Energy Research Institute@NTU (ERI@N) Nanyang Technological University 50 Nanyang Drive Singapore 637553 Republic of Singapore
| | - Ruipeng Li
- Cornell High Energy Synchrotron Source Cornell University Ithaca NY 14853 USA
| | - Hai Xiao
- Materials and Process Simulation Center (MSC) and Joint Center for Artificial Photosynthesis (JCAP) California Institute of Technology Pasadena CA 91125 USA
| | - Jason Crowley
- Materials and Process Simulation Center (MSC) and Joint Center for Artificial Photosynthesis (JCAP) California Institute of Technology Pasadena CA 91125 USA
| | - Chenyu Wang
- Department of Chemistry State University of New York at Binghamton Binghamton NY 13902 USA
| | - Timothy J. White
- School of Materials Science and Engineering Nanyang Technological University Nanyang Avenue Singapore 639798 Republic of Singapore
| | - William A. Goddard
- Materials and Process Simulation Center (MSC) and Joint Center for Artificial Photosynthesis (JCAP) California Institute of Technology Pasadena CA 91125 USA
| | - Zhongwu Wang
- Cornell High Energy Synchrotron Source Cornell University Ithaca NY 14853 USA
| | - Tom Baikie
- Energy Research Institute@NTU (ERI@N) Nanyang Technological University 50 Nanyang Drive Singapore 637553 Republic of Singapore
| | - Jiye Fang
- Materials Science and Engineering Program State University of New York at Binghamton Binghamton NY 13902 USA
- Department of Chemistry State University of New York at Binghamton Binghamton NY 13902 USA
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Bai F, Li B, Bian K, Haddad R, Wu H, Wang Z, Fan H. Pressure-Tuned Structure and Property of Optically Active Nanocrystals. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:1989-1993. [PMID: 26755432 DOI: 10.1002/adma.201504819] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2015] [Revised: 11/24/2015] [Indexed: 06/05/2023]
Abstract
Investigations through high-pressure X-ray scattering and spectroscopy in combination with theoretical computations shows that high-pressure compression can systematically tune the optical properties and mechanical stability of the molecular nanocrystals.
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Affiliation(s)
- Feng Bai
- Key Laboratory for Special Functional Materials of the Ministry of Education, Henan University, Kaifeng, 475004, P. R. China
| | - Binsong Li
- Sandia National Laboratories, Advanced Materials Laboratory, 1001 University Blvd. SE, Albuquerque, NM, 87106, USA
| | - Kaifu Bian
- Sandia National Laboratories, Advanced Materials Laboratory, 1001 University Blvd. SE, Albuquerque, NM, 87106, USA
| | - Raid Haddad
- Department of Chemical and Biological Engineering, Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM, 87131, USA
| | - Huimeng Wu
- Sandia National Laboratories, Advanced Materials Laboratory, 1001 University Blvd. SE, Albuquerque, NM, 87106, USA
| | - Zhongwu Wang
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY, 14853, USA
| | - Hongyou Fan
- Sandia National Laboratories, Advanced Materials Laboratory, 1001 University Blvd. SE, Albuquerque, NM, 87106, USA
- Department of Chemical and Biological Engineering, Center for Micro-Engineered Materials, University of New Mexico, Albuquerque, NM, 87131, USA
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13
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Li Q, Zhang H, Liu R, Liu B, Li D, Zheng L, Liu J, Cui T, Liu B. Nanosize effects assisted synthesis of the high pressure metastable phase in ZrO2. NANOSCALE 2016; 8:2412-2417. [PMID: 26754580 DOI: 10.1039/c5nr07503c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The size effects on the high pressure behaviors of monoclinic (MI) ZrO2 nanoparticles were studied using in situ high pressure synchrotron X-ray diffraction (XRD) and X-ray absorption spectroscopy (XAS). A size-dependent phase transition behavior under high pressure was found in nanoscale ZrO2. The normal phase transition sequence of MI-orthorhombic I (OI)-orthorhombic II (OII) occurs in 100-300 nm ZrO2 nanoparticles, while only the transition of MI-OI exists in ultrafine ∼5 nm ZrO2 nanoparticles up to the highest experimental pressure of ∼52 GPa. This indicates that the size effects preclude the transition from the OI to the OII phase in ∼5 nm nanoparticles. Upon decompression, the OII and OI phases are retained down to ambient pressure, respectively. This is the first observation of the pure OI phase ZrO2 under ambient conditions. The bulk moduli of the MI ZrO2 nanoparticles were determined to be B0 = 192 (7) GPa for the 100-300 nm nanoparticles and B0 = 218 (12) GPa for the ∼5 nm nanoparticles. We suggest that the significant high surface energy precludes the transition from the OI to the OII phase and the nanosize effects enhance the incompressibility in the ultrafine ZrO2 nanoparticles (∼5 nm). Our study indicates that this is a potential way of preparing novel nanomaterials with high pressure structures using nanosize effects.
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Affiliation(s)
- Quanjun Li
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China.
| | - Huafang Zhang
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China.
| | - Ran Liu
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China.
| | - Bo Liu
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China.
| | - Dongmei Li
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China.
| | - Lirong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Liu
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Tian Cui
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China.
| | - Bingbing Liu
- State Key Laboratory of Superhard Materials, Jilin University, Changchun 130012, P.R. China.
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14
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He Q, Yuan T, Wang Y, Guleria A, Wei S, Zhang G, Sun L, Liu J, Yu J, Young DP, Lin H, Khasanov A, Guo Z. Manipulating the dimensional assembly pattern and crystalline structures of iron oxide nanostructures with a functional polyolefin. NANOSCALE 2016; 8:1915-1920. [PMID: 26754459 DOI: 10.1039/c5nr07213a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Controlled crystalline structures (α- and γ-phase) and assembly patterns (1-D, 2-D and 3-D) were achieved in the synthesized iron oxide (Fe2O3) nanoparticles (NPs) using polymeric surfactant-polypropylene grafted maleic anhydride (PP-g-MA) with different concentrations. In addition, the change of the crystalline structure from the α- and γ-phase also led to the significantly increased saturation magnetization and coercivity.
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Affiliation(s)
- Qingliang He
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Tingting Yuan
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Yiran Wang
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Abhishant Guleria
- Department of Chemistry and Biochemistry, Lamar University, Beaumont, Texas 77710, USA.
| | - Suying Wei
- Department of Chemistry and Biochemistry, Lamar University, Beaumont, Texas 77710, USA.
| | - Guoqi Zhang
- Department of Sciences, John Jay College and the Graduate Center, The City University of New York, New York, 10019, USA.
| | - Luyi Sun
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - Jingjing Liu
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - Jingfang Yu
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - David P Young
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - Hongfei Lin
- Department of Chemical and Materials Engineering, University of Nevada, Reno, Nevada 89557, USA
| | - Airat Khasanov
- Department of Chemistry, University of North Carolina at Asheville, Asheville, North Carolina 28804, USA
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
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15
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Li R, Bian K, Wang Y, Xu H, Hollingsworth JA, Hanrath T, Fang J, Wang Z. An Obtuse Rhombohedral Superlattice Assembled by Pt Nanocubes. NANO LETTERS 2015; 15:6254-6260. [PMID: 26280872 DOI: 10.1021/acs.nanolett.5b02879] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We grew large single three-dimensional supercrystals from colloidal Pt nanocubes (NCs) suspended in hexane. A synchrotron-based two circle diffractometer was used to obtain an unprecedented level of detail from full sets of small/wide-angle X-ray scattering (SAXS/WAXS) patterns. Automatic indexing and simulations of X-ray patterns enabled detailed reconstruction of NC translation and shape orientation within the supercrystals from atomic to mesometric levels. The supercrystal has an obtuse rhombohedral (Rh) superlattice with space group R3m and a trigonal cell angle of 106.2°. Individual NCs orient themselves in a manner of atomic Pt[111] parallel to superlattice Rh[111]. We analyzed the superlattice structure in context of three spatial relationships of proximate NCs including face-to-face, edge-to-edge, and corner-to-corner configurations. Detailed analysis of supercrystal structure reveals nearly direct corner-to-corner contacts and a tight interlocking NC structure. We employed the correlations between strain and lattice distortion and established the first structural correlating mechanism between five superlattice polymorphs to elucidate the superlattice transformations and associated developing pathways. Together, the experimental and modeling results provide comprehensive structural information toward controlling design and efficient materials-processing for large fabrication of nanobased functional materials with tailored structures and desired properties.
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Affiliation(s)
| | | | - Yuxuan Wang
- Department of Chemistry, State University of New York at Binghamton , Binghamton, New York 13902, United States
| | | | | | | | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton , Binghamton, New York 13902, United States
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16
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Wang T, Li R, Quan Z, Loc WS, Bassett WA, Xu H, Cao YC, Fang J, Wang Z. Pressure Processing of Nanocube Assemblies Toward Harvesting of a Metastable PbS Phase. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:4544-4549. [PMID: 26179895 DOI: 10.1002/adma.201502070] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2015] [Revised: 05/24/2015] [Indexed: 06/04/2023]
Abstract
This materials-by-design approach combines nanocrystal assembly with pressure processing to drive the attachment and coalescence of PbS nanocubes along directed crystallographic dimensions to form a large 3D porous architecture. This quenchable and strained mesostructure holds the storage of large internal stress, which stabilizes the high-pressure PbS phase in atmospheric conditions. Nanocube fusion enhances the structural stability; the large surface area maintains the size-dependent properties.
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Affiliation(s)
- Tie Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Science, Beijing, 100190, China
- Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Ruipeng Li
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY, 14853, USA
| | - Zewei Quan
- Department of Chemistry, State University of New York at Binghamton, NY, 13902, USA
| | - Welley Siu Loc
- Department of Chemistry, State University of New York at Binghamton, NY, 13902, USA
| | - William A Bassett
- Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, NY, 14853, USA
| | - Hongwu Xu
- Earth and Environmental Sciences Division, Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Y Charles Cao
- Department of Chemistry, University of Florida, Gainesville, FL, 32611, USA
| | - Jiye Fang
- Department of Chemistry, State University of New York at Binghamton, NY, 13902, USA
| | - Zhongwu Wang
- Cornell High Energy Synchrotron Source, Cornell University, Ithaca, NY, 14853, USA
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17
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Zhou B, Xiao G, Yang X, Li Q, Wang K, Wang Y. Pressure-dependent optical behaviors of colloidal CdSe nanoplatelets. NANOSCALE 2015; 7:8835-8842. [PMID: 25910180 DOI: 10.1039/c4nr07589g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two-dimensional (2D) colloidal anisotropic CdSe nanoplatelets (NPLs) have attracted a great deal of attraction within recent years. Their strong thickness-dependent absorption and emission spectra exhibit significant differences from those of other shaped CdSe nanocrystals (NCs) due to a unique atomically flat morphology. Based on their dielectric confinement effect and the large confinement energy, the 2D CdSe NPLs exhibit the best characteristics of optical and electronic properties as compared to the other CdSe nanocrystallite ensembles. Here, we systematically investigate the in situ high-pressure photoluminescence (PL), absorption, and time-resolved PL spectroscopy of CdSe NPLs with different thicknesses. The pressure-dependent optical behaviors of these NPLs exhibit several remarkable differences compared with those of other shaped CdSe NCs such as a higher phase transition pressure, irreversible PL and absorption spectra after the release of pressure, a narrower tunable range of absorption and PL peak energies, and minor changes in the ranges of PL decay time with increasing pressure. These phenomena and results are attributed to their unique geometric shape and distinctive soft ligand bonding on the surface.
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Affiliation(s)
- Bo Zhou
- State Key Laboratory of Superhard Materials, Jilin University, Changchun, 130012, P. R. China.
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18
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Machon D, Mélinon P. Size-dependent pressure-induced amorphization: a thermodynamic panorama. Phys Chem Chem Phys 2015; 17:903-10. [DOI: 10.1039/c4cp04633a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complex behavior of nanoparticles subjected to high-pressure is analyzed using different thermodynamic and geometrical approaches. The defect density and the surface states are identified as the main factors governing the pressure-induced transitions of nanoparticles.
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Affiliation(s)
- Denis Machon
- Institut Lumière Matière
- UMR 5306 Université Lyon 1-CNRS
- Université de Lyon
- 69622 Villeurbanne cedex
- France
| | - Patrice Mélinon
- Institut Lumière Matière
- UMR 5306 Université Lyon 1-CNRS
- Université de Lyon
- 69622 Villeurbanne cedex
- France
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19
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He Q, Yuan T, Yan X, Luo Z, Haldolaarachchige N, Young DP, Wei S, Guo Z. One-pot synthesis of size- and morphology-controlled 1-D iron oxide nanochains with manipulated magnetic properties. Chem Commun (Camb) 2014; 50:201-3. [PMID: 24217186 DOI: 10.1039/c3cc47377e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polypropylene grafted maleic anhydride (PP-MA, 2500 g mole(-1)) has demonstrated its unique capability to synthesize 1-D ferromagnetic hard (292.7 Oe) γ-Fe2O3 nanochains made of ~24 nm nanoparticles vs. PP-MA with 8000 g mole(-1) for the synthesis of 1-D ferromagnetic soft (70.5 Oe) γ-Fe2O3 nanochains (30 nm) made of flowerlike nanoparticles.
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Affiliation(s)
- Qingliang He
- Integrated Composites Laboratory (ICL), Dan F. Smith Department of Chemical Engineering, Lamar University, Beaumont, Texas 77710, USA.
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20
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Abstract
We demonstrate for the first time a new mechanical annealing method that can significantly improve the structural quality of self-assembled nanoparticle arrays by eliminating defects at room temperature. Using in situ high-pressure small-angle X-ray scattering, we show that deformation of nanoparticle assembly in the presence of gigapascal level stress rebalances interparticle forces within nanoparticle arrays and transforms the nanoparticle film from an amorphous assembly with defects into a quasi-single crystalline superstructure. Our results show that the existence of the hydrostatic pressure field makes the transformation both thermodynamically and kinetically possible/favorable, thus providing new insight for nanoparticle self-assembly and integration with enhanced mechanical performance.
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Affiliation(s)
- Huimeng Wu
- Advanced
Materials Laboratory, Sandia National Laboratory, Albuquerque, New Mexico 87106, United States
| | - Zhongwu Wang
- Cornell
High Energy Synchrotron Source, Wilson Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Hongyou Fan
- Advanced
Materials Laboratory, Sandia National Laboratory, Albuquerque, New Mexico 87106, United States
- NSF
Center for Micro-Engineered Materials, Department of Chemical and
Nuclear Engineering, The University of New
Mexico, Albuquerque, New Mexico 87131, United States
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21
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Quan Z, Luo Z, Wang Y, Xu H, Wang C, Wang Z, Fang J. Pressure-induced switching between amorphization and crystallization in PbTe nanoparticles. NANO LETTERS 2013; 13:3729-3735. [PMID: 23805798 DOI: 10.1021/nl4016705] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Combining in situ high-pressure X-ray scattering with transmission electron microscopy, we investigated the pressure-induced structural switches between the rock salt and amorphous phases as well as the associated mechanisms of their crystallization and growth in 6 nm PbTe nanocrystal. It was observed that rock salt PbTe nanocrystal started to become amorphous above 10 GPa and then underwent a low-to-high density amorphous phase transformation at pressures over 15 GPa. The low-density amorphous phase exhibited a structural memory of the rock salt phase, as manifested by a backward transformation to the rock salt phase via single nucleation inside each nanoparticle upon the release of pressure. In contrast, the high-density amorphous phase remained stable and could be preserved at ambient conditions. In addition, electron beam-induced heating could drive a recrystallization of the rock salt phase on the recovered amorphous nanoparticles. These studies provide significant insights into structural mechanisms for pressure-induced switching between amorphous and crystalline phases as well as their associated growth processes.
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Affiliation(s)
- Zewei Quan
- Department of Chemistry, State University of New York at Binghamton, Binghamton, New York 13902, United States
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22
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Shear-induced phase transition of nanocrystalline hexagonal boron nitride to wurtzitic structure at room temperature and lower pressure. Proc Natl Acad Sci U S A 2012; 109:19108-12. [PMID: 23129624 DOI: 10.1073/pnas.1214976109] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Disordered structures of boron nitride (BN), graphite, boron carbide (BC), and boron carbon nitride (BCN) systems are considered important precursor materials for synthesis of superhard phases in these systems. However, phase transformation of such materials can be achieved only at extreme pressure-temperature conditions, which is irrelevant to industrial applications. Here, the phase transition from disordered nanocrystalline hexagonal (h)BN to superhard wurtzitic (w)BN was found at room temperature under a pressure of 6.7 GPa after applying large plastic shear in a rotational diamond anvil cell (RDAC) monitored by in situ synchrotron X-ray diffraction (XRD) measurements. However, under hydrostatic compression to 52.8 GPa, the same hBN sample did not transform to wBN but probably underwent a reversible transformation to a high-pressure disordered phase with closed-packed buckled layers. The current phase-transition pressure is the lowest among all reported direct-phase transitions from hBN to wBN at room temperature. Usually, large plastic straining leads to disordering and amorphization; here, in contrast, highly disordered hBN transformed to crystalline wBN. The mechanisms of strain-induced phase transformation and the reasons for such a low transformation pressure are discussed. Our results demonstrate a potential of low pressure-room temperature synthesis of superhard materials under plastic shear from disordered or amorphous precursors. They also open a pathway of phase transformation of nanocrystalline materials and materials with disordered and amorphous structures under extensive shear.
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23
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Bian K, Wang Z, Hanrath T. Comparing the Structural Stability of PbS Nanocrystals Assembled in fcc and bcc Superlattice Allotropes. J Am Chem Soc 2012; 134:10787-90. [DOI: 10.1021/ja304259y] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kaifu Bian
- School
of Chemical and Biomolecular Engineering and ‡Cornell High Energy Synchrotron
Source (CHESS), Cornell University, Ithaca, New York 14853, United States
| | - Zhongwu Wang
- School
of Chemical and Biomolecular Engineering and ‡Cornell High Energy Synchrotron
Source (CHESS), Cornell University, Ithaca, New York 14853, United States
| | - Tobias Hanrath
- School
of Chemical and Biomolecular Engineering and ‡Cornell High Energy Synchrotron
Source (CHESS), Cornell University, Ithaca, New York 14853, United States
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