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Jain A, Kumar M. Sketching Precursor Evolution to Delineate Growth Pathways for Anatase (TiO 2) Crystal Design. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309100. [PMID: 38193261 DOI: 10.1002/smll.202309100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 12/18/2023] [Indexed: 01/10/2024]
Abstract
Engineering advanced functional materials such as Anatase crystals through the molecular tuning of crystal facets is the current enigma of interest pertinent to solving the structure-property-performance triad. Developing optimal shapes and sizes of crystallite necessitates exploring the nanoscopic growth mechanism via precursor tracking. Here, the tapestry of particles varying in dimensionality (0D-3D), sizes (8-3000 nm), and morphology (aggregated to highly faceted crystals) is generated. To decipher and subsequently modulate the crystallization pathways, high-resolution microscopy (high-resolution transmission electron microscopy(HRTEM) and field emission scanning electron microscopy(FESEM)) is used to sketch time-stamped particle evolution. Interestingly, the studies provide evidence for 4-distinct mechanisms where nanoparticles/nanosheets play direct and/or indirect roles in crystallization through multi-stage aggregation (primary, secondary, and tertiary) beginning with similar growth solutions. The four distinct pathways elucidate bulk particle formation via non-classical routes of crystallization including nanosheet alignment and aggregation, nanocrystallite formation and fusion, nanobeads formation and attachment, and direct nanosheet incorporation in bulk crystals. Notably, the direct evidence of flexible-partially-ordered nanosheets being subsumed along the contours of bulk crystals is captured. These novel syntheses generated uniquely faceted particles with high-indexed surface planes such as (004), (200), and (105), amenable to photocatalytic applications.
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Affiliation(s)
- Anusha Jain
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, Delhi, New Delhi, 110016, India
| | - Manjesh Kumar
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, Delhi, New Delhi, 110016, India
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2
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Chen X, Bagnall D, Nasiri N. Highly Porous ZnO/CNT Hybrid Microclusters for Superior UV Photodetection. ACS APPLIED MATERIALS & INTERFACES 2024; 16:27614-27626. [PMID: 38722974 DOI: 10.1021/acsami.4c02284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2024]
Abstract
The formation of nanoscale junctions among nanoparticles in self-assembled nanostructures is crucial for improving both interfacial conductivity and structural integrity. However, the inherent reliance on weak van der Waals forces to hold nanoparticles together poses challenges in developing commercially viable devices due to their inefficient carrier transport characteristics. This study presents the successful integration of carbon nanotubes (CNTs) into highly porous nanomicrocluster arrays of ZnO, resulting in the formation of cohesive and crack-free highly porous ZnO/CNT heterojunction films. This integration marks a significant improvement in UV photodetection performance, demonstrating a record-high photocurrent to dark current ratio of 3.3 × 106 and an exceptional responsivity of 18.5 A/W at a low bias of 0.5 V and under an ultra low light density of 25 μW/cm2. These findings underscore the efficacy of this high-performance structure as a versatile and scalable platform technology for the rapid, cost-effective fabrication of hybrid photodetectors in wearable and portable devices.
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Affiliation(s)
- Xiaohu Chen
- NanoTech Laboratory, School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney 2109, Australia
- Smart Green Cities Research Centre, Macquarie University, Sydney 2109, Australia
| | - Darren Bagnall
- Smart Green Cities Research Centre, Macquarie University, Sydney 2109, Australia
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney 2109, Australia
| | - Noushin Nasiri
- NanoTech Laboratory, School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney 2109, Australia
- Smart Green Cities Research Centre, Macquarie University, Sydney 2109, Australia
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3
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Biomimetic non-classical crystallization drives hierarchical structuring of efficient circularly polarized phosphors. Nat Commun 2022; 13:3339. [PMID: 35680921 PMCID: PMC9184729 DOI: 10.1038/s41467-022-30989-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 05/24/2022] [Indexed: 11/27/2022] Open
Abstract
Hierarchically structured chiral luminescent materials hold promise for achieving efficient circularly polarized luminescence. However, a feasible chemical route to fabricate hierarchically structured chiral luminescent polycrystals is still elusive because of their complex structures and complicated formation process. We here report a biomimetic non-classical crystallization (BNCC) strategy for preparing efficient hierarchically structured chiral luminescent polycrystals using well-designed highly luminescent homochiral copper(I)-iodide hybrid clusters as basic units for non-classical crystallization. By monitoring the crystallization process, we unravel the BNCC mechanism, which involves crystal nucleation, nanoparticles aggregation, oriented attachment, and mesoscopic transformation processes. We finally obtain the circularly polarized phosphors with both high luminescent efficiency of 32% and high luminescent dissymmetry factor of 1.5 × 10−2, achieving the demonstration of a circularly polarized phosphor converted light emitting diode with a polarization degree of 1.84% at room temperature. Our designed BNCC strategy provides a simple, reliable, and large-scale synthetic route for preparing bright circularly polarized phosphors. Chiral emitters with high photoluminescence quantum yield are desirable for use in circularly polarized LEDs. The authors demonstrate the transfer of chirality from nanoscale copper iodide clusters to microscale chiral luminescent polycrystals by non-classical crystallization.
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Dopamine- and citrate-mediated, rapid synthesis of hollow calcium carbonate nanoparticles: Their formation, metastability and transformation. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.128056] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Yoon J, Hou Y, Knoepfel AM, Yang D, Ye T, Zheng L, Yennawar N, Sanghadasa M, Priya S, Wang K. Bio-inspired strategies for next-generation perovskite solar mobile power sources. Chem Soc Rev 2021; 50:12915-12984. [PMID: 34622260 DOI: 10.1039/d0cs01493a] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Smart electronic devices are becoming ubiquitous due to many appealing attributes including portability, long operational time, rechargeability and compatibility with the user-desired form factor. Integration of mobile power sources (MPS) based on photovoltaic technologies with smart electronics will continue to drive improved sustainability and independence. With high efficiency, low cost, flexibility and lightweight features, halide perovskite photovoltaics have become promising candidates for MPS. Realization of these photovoltaic MPS (PV-MPS) with unconventionally extraordinary attributes requires new 'out-of-box' designs. Natural materials have provided promising designing solutions to engineer properties under a broad range of boundary conditions, ranging from molecules, proteins, cells, tissues, apparatus to systems in animals, plants, and humans optimized through billions of years of evolution. Applying bio-inspired strategies in PV-MPS could be biomolecular modification on crystallization at the atomic/meso-scale, bio-structural duplication at the device/system level and bio-mimicking at the functional level to render efficient charge delivery, energy transport/utilization, as well as stronger resistance against environmental stimuli (e.g., self-healing and self-cleaning). In this review, we discuss the bio-inspired/-mimetic structures, experimental models, and working principles, with the goal of revealing physics and bio-microstructures relevant for PV-MPS. Here the emphasis is on identifying the strategies and material designs towards improvement of the performance of emerging halide perovskite PVs and strategizing their bridge to future MPS.
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Affiliation(s)
- Jungjin Yoon
- Department of Materials Science & Engineering, Pennsylvania State University, University Park, 16802, PA, USA.
| | - Yuchen Hou
- Department of Materials Science & Engineering, Pennsylvania State University, University Park, 16802, PA, USA.
| | - Abbey Marie Knoepfel
- Department of Materials Science & Engineering, Pennsylvania State University, University Park, 16802, PA, USA.
| | - Dong Yang
- Department of Materials Science & Engineering, Pennsylvania State University, University Park, 16802, PA, USA.
| | - Tao Ye
- Department of Materials Science & Engineering, Pennsylvania State University, University Park, 16802, PA, USA.
| | - Luyao Zheng
- Department of Materials Science & Engineering, Pennsylvania State University, University Park, 16802, PA, USA.
| | - Neela Yennawar
- Huck Institute of the Life Sciences, Pennsylvania State University, University Park, 16802, PA, USA
| | - Mohan Sanghadasa
- U.S. Army Combat Capabilities Development Command Aviation & Missile Center, Redstone Arsenal, Alabama, 35898, USA
| | - Shashank Priya
- Department of Materials Science & Engineering, Pennsylvania State University, University Park, 16802, PA, USA.
| | - Kai Wang
- Department of Materials Science & Engineering, Pennsylvania State University, University Park, 16802, PA, USA.
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6
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Maqbool Q, Jung A, Won S, Cho J, Son JG, Yeom B. Chiral Magneto-Optical Properties of Supra-Assembled Fe 3O 4 Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2021; 13:54301-54307. [PMID: 34748312 DOI: 10.1021/acsami.1c16954] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Research on the chiral magneto-optical properties of inorganic nanomaterials has enabled novel applications in advanced optical and electronic devices. However, the corresponding chiral magneto-optical responses have only been studied under strong magnetic fields of ≥1 T, which limits the wider application of these novel materials. In this paper, we report on the enhanced chiral magneto-optical activity of supra-assembled Fe3O4 magnetite nanoparticles in the visible range at weak magnetic fields of 1.5 mT. The spherical supra-assembled particles with a diameter of ∼90 nm prepared by solvothermal synthesis had single-crystal-like structures, which resulted from the oriented attachment of nanograins. They exhibited superparamagnetic behavior even with a relatively large supraparticle diameter that exceeded the size limit for superparamagnetism. This can be attributed to the small size of nanograins with a diameter of ∼12 nm that constitute the suprastructured particles. Magnetic circular dichroism (MCD) measurements at magnetic fields of 1.5 mT showed distinct chiral magneto-optical activity from charge transfer transitions of magnetite in the visible range. For the supraparticles with lower crystallinity, the MCD peaks in the 250-550 nm range assigned as the ligand-to-metal charge transfer (LMCT) and the inter-sublattice charge transfer (ISCT) show increased intensities in comparison to those with higher crystallinity samples. On the contrary, the higher crystallinity sample shows higher MCD intensities near 600-700 nm for the intervalence charge transfer (IVCT) transition. The differences in MCD responses can be attributed to the crystallinity determined by the reaction time, lattice distortion near grain boundaries of the constituent nanocrystals, and dipolar interactions in the supra-assembled structures.
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Affiliation(s)
- Qysar Maqbool
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
- Institute of Nano Science and Technology, Hanyang University, Seoul 04763, Republic of Korea
| | - Arum Jung
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Sojeong Won
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
| | - Jinhan Cho
- Department of Chemical and Biological Engineering, Korea University, Seongbuk-gu, Seoul 02841, Republic of Korea
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Jeong Gon Son
- KU-KIST Graduate School of Converging Science and Technology, Korea University, Seongbuk-gu, Seoul 02841, Republic of Korea
- Soft Hybrid Materials Research Center, Korea Institute of Science and Technology (KIST), Seongbuk-gu, Seoul 02792, Republic of Korea
| | - Bongjun Yeom
- Department of Chemical Engineering, Hanyang University, Seoul 04763, Republic of Korea
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7
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Kumar KV, Ramisetty KA, Devi KR, Krishna GR, Heffernan C, Stewart AA, Guo J, Gadipelli S, Brett DJL, Favvas EP, Rasmuson ÅC. Pure Curcumin Spherulites from Impure Solutions via Nonclassical Crystallization. ACS OMEGA 2021; 6:23884-23900. [PMID: 34568668 PMCID: PMC8459370 DOI: 10.1021/acsomega.1c02794] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/25/2021] [Indexed: 05/10/2023]
Abstract
Crystallization experiments performed with highly supercooled solutions produced highly pure (>99 wt %) and highly crystalline mesocrystals of curcumin from impure solutions (∼22% of two structurally similar impurities) in one step. These mesocrystals exhibited a crystallographic hierarchy and were composed of perfectly or imperfectly aligned nanometer-thick crystallites. X-ray diffraction and spectroscopic analysis confirmed that the spherulites are a new solid form of curcumin. A theoretical hypothesis based on particle aggregation, double nucleation, and repeated secondary nucleation is proposed to explain the spherulite formation mechanism. The experimental results provide, for the first time, evidence for an organic molecule to naturally form spherulites without the presence of any stabilizing agents. Control experiments performed with highly supercooled pure solutions produced spherulites, confirming that the formation of spherulites is attributed to the high degree of supercooling and not due to the presence of impurities. Likewise, control experiments performed with a lower degree of supercooling produced impure crystals of curcumin via classical molecular addition mechanisms. Collectively, these experimental observations provide, for the first time, evidence for particle-mediated crystallization as an alternate and efficient method to purify organic compounds.
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Affiliation(s)
- K Vasanth Kumar
- Synthesis and Solid State Pharmaceutical Centre, Department of Chemical Sciences and the Bernal Institute, University of LimerickRINGGOLD, Limerick V94 T9PX, Ireland
| | - Kiran A Ramisetty
- Synthesis and Solid State Pharmaceutical Centre, Department of Chemical Sciences and the Bernal Institute, University of LimerickRINGGOLD, Limerick V94 T9PX, Ireland
| | - K Renuka Devi
- Synthesis and Solid State Pharmaceutical Centre, Department of Chemical Sciences and the Bernal Institute, University of LimerickRINGGOLD, Limerick V94 T9PX, Ireland
| | - Gamidi Rama Krishna
- Synthesis and Solid State Pharmaceutical Centre, Department of Chemical Sciences and the Bernal Institute, University of LimerickRINGGOLD, Limerick V94 T9PX, Ireland
| | - Claire Heffernan
- Synthesis and Solid State Pharmaceutical Centre, Department of Chemical Sciences and the Bernal Institute, University of LimerickRINGGOLD, Limerick V94 T9PX, Ireland
| | - Andrew A Stewart
- Department of Physics and the Bernal Institute, University of Limerick, Limerick V94 T9PX, Ireland
| | - Jian Guo
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Srinivas Gadipelli
- Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K
| | - Dan J L Brett
- Electrochemical Innovation Lab, Department of Chemical Engineering, University College London, Torrington Place, London WC1E 7JE, U.K
| | - Evangelos P Favvas
- Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", Agia Paraskevi 15341, Attica, Greece
| | - Åke C Rasmuson
- Synthesis and Solid State Pharmaceutical Centre, Department of Chemical Sciences and the Bernal Institute, University of LimerickRINGGOLD, Limerick V94 T9PX, Ireland
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8
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Zhang Y, Qu ZB, Jiang C, Liu Y, Pradeep Narayanan R, Williams D, Zuo X, Wang L, Yan H, Liu H, Fan C. Prescribing Silver Chirality with DNA Origami. J Am Chem Soc 2021; 143:8639-8646. [DOI: 10.1021/jacs.1c00363] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yinan Zhang
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
- Center for Molecular Design and Biomimetics, The Biodesign Institute, School of Molecular Sciences, Arizona State University, Tempe, Arizona 85281, United States
| | - Zhi-bei Qu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Chu Jiang
- School of Chemical Science and Engineering, Shanghai Research Institute for Intelligent Autonomous Systems, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 200092, China
| | - Yingying Liu
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Raghu Pradeep Narayanan
- Center for Molecular Design and Biomimetics, The Biodesign Institute, School of Molecular Sciences, Arizona State University, Tempe, Arizona 85281, United States
| | - Dewight Williams
- Eyring Materials Center, Office of Knowledge Enterprise Development, Arizona State University, Tempe, Arizona 85281, United States
| | - Xiaolei Zuo
- Institute of Molecular Medicine, Shanghai Key Laboratory for Nucleic Acids Chemistry and Nanomedicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lihua Wang
- Bioimaging Center, Shanghai Synchrotron Radiation Facility, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, China
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, 500 Dongchuan Road, Shanghai 200241, China
| | - Hao Yan
- Center for Molecular Design and Biomimetics, The Biodesign Institute, School of Molecular Sciences, Arizona State University, Tempe, Arizona 85281, United States
| | - Huajie Liu
- School of Chemical Science and Engineering, Shanghai Research Institute for Intelligent Autonomous Systems, Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 200092, China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and National Center for Translational Medicine, Shanghai Jiao Tong University, Shanghai 200240, China
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9
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Ma N, Sun C. Cadmium sulfide nanoparticle biomineralization and biofilm formation mediate cadmium resistance of the deep-sea bacterium Pseudoalteromonas sp. MT33b. ENVIRONMENTAL MICROBIOLOGY REPORTS 2021; 13:325-336. [PMID: 33511774 DOI: 10.1111/1758-2229.12933] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 01/21/2021] [Accepted: 01/24/2021] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) is a common toxic heavy metal in the environment, and bacteria have evolved different strategies to deal with Cd toxicity. Here, a bacterium designated Pseudoalteromonas sp. MT33b possessing strong Cd resistance was isolated from the Mariana Trench sediments. Supplement of cysteine significantly increased bacterial Cd resistance and removal rate. Biofilm formation was demonstrated to play a positive role toward bacterial Cd resistance. Transcriptome analysis showed the supplement of cysteine effectively prevented Cd2+ from entering bacterial cells, promoted saccharide metabolism and thereby facilitating energy production, which consists well with bacterial growth trend analysed under the same conditions. Notably, the expressions of many biofilm formation related genes including flagellar assembly, signal transduction, bacterial secretion and TonB-dependent transfer system were significantly upregulated when facing Cd stress, indicating their important roles in determining bacterial biofilm formation and enhancing Cd resistance. Overall, this study indicates the formation of insoluble CdS precipitates and massive biofilm is the major strategy adopted by Pseudoalteromonas sp. MT33b to eliminate Cd stress. Our results provide a good model to investigate how heavy metals impact biofilm formation in the deep-sea ecosystems, which may facilitate a deeper understanding of microbial environmental adaptability and better utilization of these microbes for bioremediation purposes in the future.
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Affiliation(s)
- Ning Ma
- CAS Key Laboratory of Experimental Marine Biology & Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
- College of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Chaomin Sun
- CAS Key Laboratory of Experimental Marine Biology & Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
- Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China
- Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
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10
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Ji Y, Yang X, Yang D, Zhang R. PU14, a Novel Matrix Protein, Participates in Pearl Oyster, Pinctada Fucata, Shell Formation. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2021; 23:189-200. [PMID: 33689053 PMCID: PMC8032588 DOI: 10.1007/s10126-020-10014-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 12/27/2020] [Indexed: 06/12/2023]
Abstract
Biomineralization is a widespread biological process, involved in the formation of shells, teeth, and bones. Shell matrix proteins have been widely studied for their importance during shell formation. In 2015, our group identified 72 unique shell matrix proteins in Pinctada fucata, among which PU14 is a matrix protein detected in the soluble fraction that solely exists in the prismatic layer. However, the function of PU14 is still unclear. In this study, the full-length cDNA sequence of PU14 was obtained and functional analyses of PU14 protein during shell formation were performed. The deduced protein has a molecular mass of 77.8 kDa and an isoelectric point of 11.34. The primary protein structure contains Gln-rich and random repeat units, which are typical characteristics of matrix protein and indicate its potential function during shell formation. In vivo and in vitro experiments indicated PU14 has prismatic layer functions during shell formation. The tissue expression patterns showed that PU14 was mainly expressed in the mantle tissue, which is consistent with prismatic layer formation. Notching experiments suggested that PU14 responded to repair and regenerate the injured shell. After inhibiting gene expression by injecting PU14-specific double-stranded RNA, the inner surface of the prismatic layer changed significantly and became rougher. Further, in vitro experiments showed that recombinant protein rPU14 impacted calcite crystal morphology. Taken together, characterization and functional analyses of a novel matrix protein, PU14, provide new insights about basic matrix proteins and their functions during shell formation.
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Affiliation(s)
- Yinghui Ji
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Xue Yang
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Dong Yang
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Rongqing Zhang
- Ministry of Education Key Laboratory of Protein Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
- Zhe Jiang Provincial Key Laboratory of Applied Enzymology, Yangtze Delta Region Institute of Tsinghua University, 705 Yatai Road, Jiaxing, 314006, China.
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing, 314001, China.
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11
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Song B, Tian Z, van der Weijden RD, Buisman CJN, Weijma J. High-rate biological selenate reduction in a sequencing batch reactor for recovery of hexagonal selenium. WATER RESEARCH 2021; 193:116855. [PMID: 33556693 DOI: 10.1016/j.watres.2021.116855] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 12/30/2020] [Accepted: 01/16/2021] [Indexed: 06/12/2023]
Abstract
Recovery of selenium (Se) from wastewater provides a solution for both securing Se supply and preventing Se pollution. Here, we developed a high-rate process for biological selenate reduction to elemental selenium. Distinctive from other studies, we aimed for a process with selenate as the main biological electron sink, with minimal formation of methane or sulfide. A sequencing batch reactor, fed with an influent containing 120 mgSe L-1 selenate and ethanol as electron donor and carbon source, was operated for 495 days. The high rates (419 ± 17 mgSe L-1 day-1) were recorded between day 446 and day 495 for a hydraulic retention time of 6 h. The maximum conversion efficiency of selenate amounted to 96% with a volumetric conversion rate of 444 mgSe L-1 day-1, which is 6 times higher than the rates reported in the literature thus far. At the end of the experiment, a highly enriched selenate reducing biomass had developed, with a specific activity of 856 ± 26 mgSe-1day-1gbiomass-1, which was nearly 1000-fold higher than that of the inoculum. No evidence was found for the formation of methane, sulfide, or volatile reduced selenium compounds like dimethyl-selenide or H2Se, revealing a high selectivity. Ethanol was incompletely oxidized to acetate. The produced elemental selenium partially accumulated in the reactor as pure (≥80% Se of the total mixture of biomass sludge flocs and flaky aggregates, and ~100% of the specific flaky aggregates) selenium black hexagonal needles, with cluster sizes between 20 and 200 µm. The new process may serve as the basis for a high-rate technology to remove and recover pure selenium from wastewater or process streams with high selectivity.
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Affiliation(s)
- B Song
- Department of Environmental Technology, Wageningen University and Research, P.O. Box 17; 6700 AA Wageningen, the Netherlands
| | - Z Tian
- Department of Environmental Technology, Wageningen University and Research, P.O. Box 17; 6700 AA Wageningen, the Netherlands
| | - R D van der Weijden
- Department of Environmental Technology, Wageningen University and Research, P.O. Box 17; 6700 AA Wageningen, the Netherlands
| | - C J N Buisman
- Department of Environmental Technology, Wageningen University and Research, P.O. Box 17; 6700 AA Wageningen, the Netherlands
| | - J Weijma
- Department of Environmental Technology, Wageningen University and Research, P.O. Box 17; 6700 AA Wageningen, the Netherlands.
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12
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Gaudisson T, Sharma SK, Mohamed R, Sitamtze Youmbi B, Menguy N, Calvayrac F, Seydou M, Ammar-Merah S. Experimental and theoretical evidence for oriented aggregate crystal growth of CoO in a polyol. CrystEngComm 2021. [DOI: 10.1039/d0ce01525c] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
CoO submicrometer-sized pseudo-single crystals were produced in polyol thanks to an oriented aggregation crystal growth driven by the polyol molecules themselves.
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13
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Ma N, Sha Z, Sun C. Formation of cadmium sulfide nanoparticles mediates cadmium resistance and light utilization of the deep-sea bacterium Idiomarina sp. OT37-5b. Environ Microbiol 2020; 23:934-948. [PMID: 32815245 DOI: 10.1111/1462-2920.15205] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 08/16/2020] [Indexed: 01/10/2023]
Abstract
Heavy metal is one of the major factors threatening the survival of microorganisms. Here, a deep-sea bacterium designated Idiomarina sp. OT37-5b possessing strong cadmium (Cd) tolerance was isolated from a typical hydrothermal vent. Both the Cd-resistance and removal efficiency of Idiomarina sp. OT37-5b were significantly promoted by the supplement of cysteine and meanwhile large amount of CdS nanoparticles were observed. Production of H2 S from cysteine catalysed by methionine gamma-lyase was further demonstrated to contribute to the formation of CdS nanoparticles. Proteomic results showed the addition of cysteine effectively enhanced the efflux of Cd, improved the activities of reactive oxygen species scavenging enzymes, and thereby boosted the nitrogen reduction and energy production of Idiomarina sp. OT37-5b. Notably, the existence of CdS nanoparticles obviously promoted the growth of Idiomarina sp. OT37-5b when exposed to light, indicating this bacterium might grab light energy through CdS nanoparticles. Proteomic analysis revealed the expression levels of essential components for light utilization including electron transport, cytochrome complex and F-type ATPase were significantly up-regulated, which strongly suggested the formation of CdS nanoparticles promoted light utilization and energy production. Our results provide a good model to investigate the uncovered mechanisms of self-photosensitization of nonphotosynthetic bacteria for light-to-chemical production in the deep biosphere.
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Affiliation(s)
- Ning Ma
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.,College of Earth Science, University of Chinese Academy of Sciences, Beijing, 100049, China.,Centre of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Zhongli Sha
- Centre of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.,Laboratory of Marine Organism Taxonomy and Phylogeny, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.,Centre for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
| | - Chaomin Sun
- CAS Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.,Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China.,Centre of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China.,Centre for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, 266071, China
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14
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Lange AP, Samanta A, Olson TY, Elhadj S. Quantized Grain Boundary States Promote Nanoparticle Alignment During Imperfect Oriented Attachment. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2020; 16:e2001423. [PMID: 32519454 DOI: 10.1002/smll.202001423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 04/27/2020] [Indexed: 06/11/2023]
Abstract
Oriented attachment (OA) has become a well-recognized mechanism for the growth of metal, ceramic, and biomineral crystals. While many computational and experimental studies of OA have shown that particles can attach with some misorientation then rotate to remove adjoining grain boundaries, the underlying atomistic pathways for this "imperfect OA" process remain the subject of debate. In this study, molecular dynamics and in situ transmission electron microscopy (TEM) are used to probe the crystallographic evolution of up to 30 gold nanoparticles during aggregation. It is found that Imperfect OA occurs because 1) grain boundaries become quantized when their size is comparable to the separation between constituent dislocations and 2) kinetic barriers associated with the glide of grain boundary dislocations are small. In support of these findings, TEM experiments show the formation of a single crystal aggregate after annealing nine initially misoriented, agglomerated particles with evidence of dislocation activity and twin formation during particle/grain alignment. These observations motivate future work on assembled nanocrystals with tailored defects and call for a revision of Read-Shockley models for grain boundary energies in nanocrystalline materials.
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Affiliation(s)
- Andrew P Lange
- Lawrence Livermore National Laboratory, Mail-stop 470, 7000 East Ave., Livermore, CA, 94550, USA
| | - Amit Samanta
- Lawrence Livermore National Laboratory, Mail-stop 470, 7000 East Ave., Livermore, CA, 94550, USA
| | - Tammy Y Olson
- Lawrence Livermore National Laboratory, Mail-stop 470, 7000 East Ave., Livermore, CA, 94550, USA
| | - Selim Elhadj
- Lawrence Livermore National Laboratory, Mail-stop 470, 7000 East Ave., Livermore, CA, 94550, USA
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15
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Wang X, Zhong X, Bai L, Xu J, Gong F, Dong Z, Yang Z, Zeng Z, Liu Z, Cheng L. Ultrafine Titanium Monoxide (TiO 1+x) Nanorods for Enhanced Sonodynamic Therapy. J Am Chem Soc 2020; 142:6527-6537. [PMID: 32191455 DOI: 10.1021/jacs.9b10228] [Citation(s) in RCA: 261] [Impact Index Per Article: 65.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Ultrasound (US)-triggered sonodynamic therapy (SDT) that enables noninvasive treatment of large internal tumors has attracted widespread interest. For improvement in the therapeutic responses to SDT, more effective and stable sonosensitizers are still required. Herein, ultrafine titanium monoxide nanorods (TiO1+x NRs) with greatly improved sono-sensitization and Fenton-like catalytic activity were fabricated and used for enhanced SDT. TiO1+x NRs with an ultrafine rodlike structure were successfully prepared and then modified with polyethylene glycol (PEG). Compared to the conventional sonosensitizer, TiO2 nanoparticles, the PEG-TiO1+x NRs resulted in much more efficient US-induced generation of reactive oxygen species (ROS) because of the oxygen-deficient structure of TiO1+x NR, which predominantly serves as the charge trap to limit the recombination of US-triggered electron-hole pairs. Interestingly, PEG-TiO1+x NRs also exhibit horseradish-peroxidase-like nanozyme activity and can produce hydroxyl radicals (•OH) from endogenous H2O2 in the tumor to enable chemodynamic therapy (CDT). Because of their efficient passive retention in tumors post intravenous injection, PEG-TiO1+x NRs can be used as a sonosensitizer and CDT agent for highly effective tumor ablation under US treatment. In addition, no significant long-term toxicity of PEG-TiO1+x NRs was found for the treated mice. This work highlights a new type of titanium-based nanostructure with great performance for tumor SDT.
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Affiliation(s)
- Xianwen Wang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, P.R. China
| | - Xiaoyan Zhong
- National Engineering Research Centre for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, P.R. China
| | - Lixin Bai
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Jun Xu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, P.R. China
| | - Fei Gong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, P.R. China
| | - Ziliang Dong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, P.R. China
| | - Zhijuan Yang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, P.R. China
| | - Zhijie Zeng
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, P.R. China
| | - Zhuang Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, P.R. China
| | - Liang Cheng
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, Soochow University, Suzhou 215123, P.R. China
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16
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Abstract
The plastic deformation behaviors of crystalline materials are usually determined by lattice dislocations. However, below a certain particle or grain size, focus is placed on the grain-boundary-mediated mechanisms (e.g., grain rotation, grain boundary sliding, and diffusion), which has been observed during recrystallization, grain growth, and plastic deformation. However, the underlying mechanisms of grain rotation remain to be studied. In this article, we review the theoretical models, molecular dynamics simulations, and experimental investigations on grain rotation. Especially, the development of in situ transmission electron microscopy (TEM) and X-ray characterization methods for probing grain boundary processes during plastic deformation provides a better understanding of the mechanisms of grain rotation. Moreover, the ability to acquire high-quality X-ray diffraction patterns from individual nanograins is expected to find broad applications in various fields such as physics, chemistry, materials science, physics, and nanoscience.
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17
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Yang S, Zhao H, Dong F, Tang Z, Zha F. Three-dimensional flower-like OMS-2 supported Ru catalysts for application in the combustion reaction of o-dichlorobenzene. Catal Sci Technol 2019. [DOI: 10.1039/c9cy01361j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The growth mechanism of OMS-2 was studied and it was found that the sample prepared at a higher reactant concentration had more defects on surface which were critical to capturing substrate and conducive to the high dispersion of Ru4+.
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Affiliation(s)
- Sai Yang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou
| | - Haijun Zhao
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou
| | - Fang Dong
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou
| | - Zhicheng Tang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation
- and National Engineering Research Center for Fine Petrochemical Intermediates
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences
- Lanzhou
| | - Fei Zha
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- China
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18
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Kong J, Liu C, Wang T, Yang D, Yan Y, Chen Y, Liu Y, Huang J, Zheng G, Xie L, Zhang R. Cloning, characterization and functional analysis of an Alveoline-like protein in the shell of Pinctada fucata. Sci Rep 2018; 8:12258. [PMID: 30115934 PMCID: PMC6095885 DOI: 10.1038/s41598-018-29743-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 07/09/2018] [Indexed: 12/04/2022] Open
Abstract
Shell matrix proteins (SMPs) have important functions in biomineralization. In the past decades, the roles of SMPs were gradually revealed. In 2015, our group identified 72 unique SMPs in Pinctada fucata, among which Alveoline-like (Alv) protein was reported to have homologous genes in Pinctada maxima and Pinctada margaritifera. In this study, the full-length cDNA sequence of Alv and the functional analysis of Alv protein during shell formation were explored. The deduced protein (Alv), which has a molecular mass of 24.9 kDa and an isoelectric point of 11.34, was characterized, and the functional analyses was explored in vivo and in vitro. The Alv gene has high expression in mantle and could response to notching damage. The functional inhibition of Alv protein in vivo by injecting recombinant Alv (rAlv) antibodies destroyed prism structure but accelerated nacre growth. Western blot and immunofluorescence staining showed that native Alv exists in the EDTA-insoluble matrix of both prismatic and nacreous layers and has different distribution patterns in the inner or outer prismatic layer. Taken together, the characterization and functional analyses of matrix protein Alv could expand our understanding of basic matrix proteins and their functions during shell formation.
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Affiliation(s)
- Jingjing Kong
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Chuang Liu
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China.,Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, Zhejiang Province, 314006, China
| | - Tianpeng Wang
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Dong Yang
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Yi Yan
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Yan Chen
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Yangjia Liu
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Jingliang Huang
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Guilan Zheng
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Liping Xie
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Rongqing Zhang
- Protein Science Laboratory of the Ministry of Education, School of Life Sciences, School of Life Sciences, Tsinghua University, Beijing, 100084, China. .,Department of Biotechnology and Biomedicine, Yangtze Delta Region Institute of Tsinghua University, Jiaxing, Zhejiang Province, 314006, China.
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19
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di Gregorio MC, Ranjan P, Houben L, Shimon LJW, Rechav K, Lahav M, van der Boom ME. Metal-Coordination-Induced Fusion Creates Hollow Crystalline Molecular Superstructures. J Am Chem Soc 2018; 140:9132-9139. [PMID: 29939733 DOI: 10.1021/jacs.8b03055] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
In this work, we report the formation of superstructures assembled from organic tubular crystals mediated by metal-coordination chemistry. This template-free process involves the crystallization of molecules into crystals having a rectangular and uniform morphology, which then go on to fuse together into multibranched superstructures. The initially hollow and organic crystals are obtained under solvothermal conditions in the presence of a copper salt, whereas the superstructures are subsequently formed by aging the reaction mixture at room temperature. The mild thermodynamic conditions and the favorable kinetics of this unique self-assembly process allowed us to ex-situ monitor the superstructure formation by electron microscopy, highlighting a pivotal and unusual role for copper ions in their formation and stabilization.
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20
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Sahoo M, Parida K. Facile Fabrication of Organic-Inorganic Hybrid Material Based on Well-Dispersed AuNPs on Organo-Functionalised Zn-Al-Layered Double Hydroxides for Hydroamination of 1-Hexene. ChemistrySelect 2018. [DOI: 10.1002/slct.201703058] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mitarani Sahoo
- Centre for Nano Science and Nano Technology; Siksha ‘O' Anusandhan University; Bhubaneswar 751030, Odisha India
| | - Kulamani Parida
- Centre for Nano Science and Nano Technology; Siksha ‘O' Anusandhan University; Bhubaneswar 751030, Odisha India
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21
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El-Boubbou K. Magnetic iron oxide nanoparticles as drug carriers: preparation, conjugation and delivery. Nanomedicine (Lond) 2018; 13:929-952. [PMID: 29546817 DOI: 10.2217/nnm-2017-0320] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Magnetic nanoparticles (MNPs), particularly made of iron oxides, have been extensively studied as diagnostic imaging agents and therapeutic delivery vehicles. In this review, special emphasis is set on the 'recent advancements of drug-conjugated MNPs used for therapeutic applications'. The most prevalent preparation methods and chemical functionalization strategies required for translational biomedical nanoformulations are outlined. Particular attention is, then, devoted to the tailored conjugation of drugs to the MNP carrier according to either noncovalent or covalent attachments, with advantages and drawbacks of both pathways conferred. Notable examples are presented to demonstrate the advantages of MNPs in respective drug-delivery applications. Understanding of the preparation, conjugation and delivery processes will definitely bring, in the next decades, a novel magneto-nanovehicle for effective theranostics.
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Affiliation(s)
- Kheireddine El-Boubbou
- Department of Basic Sciences, College of Science & Health Professions, King Saud bin Abdulaziz University for Health Sciences (KSAU-HS), King Abdulaziz Medical City, National Guard Health Affairs, Riyadh 11481, Saudi Arabia.,King Abdullah International Medical Research Center (KAIMRC), King Abdulaziz Medical City, National Guard Hospital, Riyadh 11426, Saudi Arabia
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22
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In-situ liquid cell transmission electron microscopy investigation on oriented attachment of gold nanoparticles. Nat Commun 2018; 9:421. [PMID: 29379109 PMCID: PMC5788991 DOI: 10.1038/s41467-018-02925-6] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Accepted: 01/09/2018] [Indexed: 11/18/2022] Open
Abstract
Inside a liquid solution, oriented attachment (OA) is now recognized to be as important a pathway to crystal growth as other, more conventional growth mechanisms. However, the driving force that controls the occurrence of OA is still poorly understood. Here, using in-situ liquid cell transmission electron microscopy, we demonstrate the ligand-controlled OA of citrate-stabilized gold nanoparticles at atomic resolution. Our data reveal that particle pairs rotate randomly at a separation distance greater than twice the layer thickness of adsorbed ligands. In contrast, when the particles get closer, their ligands overlap and guide the rotation into a directional mode until they share a common {111} orientation, when a sudden contact occurs accompanied by the simultaneous expulsion of the ligands on this surface. First-principle calculations confirm that the lower ligand binding energy on {111} surfaces is the intrinsic reason for the preferential attachment at this facet, rather than on other low-index facets. The non-classical oriented attachment crystallization pathway explains the growth of many nanocrystals. Here, the authors study citrate-stabilized gold nanoparticles by in-situ liquid transmission electron microscopy to reveal that surface ligands are a critical driving force in the oriented attachment process.
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23
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Biswas A, Chakraborty A, Jana NR. Nitrogen and Fluorine Codoped, Colloidal TiO 2 Nanoparticle: Tunable Doping, Large Red-Shifted Band Edge, Visible Light Induced Photocatalysis, and Cell Death. ACS APPLIED MATERIALS & INTERFACES 2018; 10:1976-1986. [PMID: 29257666 DOI: 10.1021/acsami.7b14025] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Visible light photocatalysis by TiO2 requires efficient doping of other elements with red-shifted band edge to the visible region. However, preparation of such TiO2 with tunable doping is challenging. Here we report a method of making nitrogen (N) and fluorine (F) codoped TiO2 nanoparticle with tunable doping between 1 and 7 at. %. The preparation of N, F codoped TiO2 nanoparticle involves reaction of colloidal TiO2 nanorods with an ammonium fluoride-urea mixture at 300 °C, and the extent of N/F doping is tuned by varying the amount of ammonium fluoride-urea and the reaction time. Resultant colloidal N, F codoped TiO2 nanoparticles show doping dependent shifting of the band edge from the UV to near-IR region, visible light induced generation of reactive oxygen species (ROS), and visible light photodegradation of bisphenol A. A colloidal form of doped TiO2 nanoparticle offers labeling of cells, visible light induced ROS generation inside a cell, and successive cell death. This work shows the potential advantage of anisotropic nanoparticle precursor for tunable doping and colloidal form of N, F codoped TiO2 nanoparticle as a visible light photocatalyst.
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Affiliation(s)
- Aritra Biswas
- Centre for Advanced Materials, Indian Association for the Cultivation of Science , Kolkata 700032, India
| | - Atanu Chakraborty
- Centre for Advanced Materials, Indian Association for the Cultivation of Science , Kolkata 700032, India
| | - Nikhil R Jana
- Centre for Advanced Materials, Indian Association for the Cultivation of Science , Kolkata 700032, India
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24
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Yuan R, Xie XX, Zheng LX, Yu LL, Hu JF, Qin HM, Zhang ZJ, Zhao JT. Synthesis and characterization of rhombic dodecahedral YAG microcrystals with good dispersity, high crystallinity and controllable crystal size. CrystEngComm 2018. [DOI: 10.1039/c8ce01688g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Symmetrical rhombic dodecahedral YAG microcrystals were successfully prepared using improved hydrothermal methods.
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Affiliation(s)
- Rui Yuan
- School of Materials Science and Engineering
- Shanghai University
- Shanghai
- China
| | - Xi-Xi Xie
- School of Materials Science and Engineering
- Shanghai University
- Shanghai
- China
| | - Li-Xian Zheng
- School of Materials Science and Engineering
- Shanghai University
- Shanghai
- China
| | - Li-Li Yu
- School of Materials Science and Engineering
- Shanghai University
- Shanghai
- China
| | - Jian-Feng Hu
- School of Materials Science and Engineering
- Shanghai University
- Shanghai
- China
| | - Hai-Ming Qin
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences
- Ningbo 315201
- China
| | - Zhi-Jun Zhang
- School of Materials Science and Engineering
- Shanghai University
- Shanghai
- China
| | - Jing-Tai Zhao
- School of Materials Science and Engineering
- Shanghai University
- Shanghai
- China
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25
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Kim SY, Lee JD, Cho YJ, Son MR, Son HJ, Cho DW, Kang SO. Excitation spectroscopic and synchronous fluorescence spectroscopic analysis of the origin of aggregation-induced emission in N,N-diphenyl-1-naphthylamine-o-carborane derivatives. Phys Chem Chem Phys 2018; 20:17458-17463. [DOI: 10.1039/c8cp02603c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Excitation spectroscopy is one of the most suitable methods to classify the aggregation patterns in AIE.
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Affiliation(s)
- So-Yoen Kim
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
| | - Jong-Dae Lee
- Department of Chemistry
- College of Natural Sciences
- Chosun University
- Gwangju
- South Korea
| | - Yang-Jin Cho
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
| | - Mi Rang Son
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
| | - Ho-Jin Son
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
| | - Dae Won Cho
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
- Center for Photovoltaic Materials
| | - Sang Ook Kang
- Department of Advanced Materials Chemistry
- Korea University (Sejong)
- Sejong
- South Korea
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26
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Wang W, Yeung KWK. Bone grafts and biomaterials substitutes for bone defect repair: A review. Bioact Mater 2017; 2:224-247. [PMID: 29744432 PMCID: PMC5935655 DOI: 10.1016/j.bioactmat.2017.05.007] [Citation(s) in RCA: 848] [Impact Index Per Article: 121.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 05/19/2017] [Accepted: 05/19/2017] [Indexed: 02/08/2023] Open
Abstract
Bone grafts have been predominated used to treat bone defects, delayed union or non-union, and spinal fusion in orthopaedic clinically for a period of time, despite the emergency of synthetic bone graft substitutes. Nevertheless, the integration of allogeneic grafts and synthetic substitutes with host bone was found jeopardized in long-term follow-up studies. Hence, the enhancement of osteointegration of these grafts and substitutes with host bone is considerably important. To address this problem, addition of various growth factors, such as bone morphogenetic proteins (BMPs), parathyroid hormone (PTH) and platelet rich plasma (PRP), into structural allografts and synthetic substitutes have been considered. Although clinical applications of these factors have exhibited good bone formation, their further application was limited due to high cost and potential adverse side effects. Alternatively, bioinorganic ions such as magnesium, strontium and zinc are considered as alternative of osteogenic biological factors. Hence, this paper aims to review the currently available bone grafts and bone substitutes as well as the biological and bio-inorganic factors for the treatments of bone defect.
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Affiliation(s)
- Wenhao Wang
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong, China
- Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma, The University of Hong Kong Shenzhen Hospital, 1 Haiyuan 1st Road, Futian District, Shenzhen, China
| | - Kelvin W K Yeung
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Pokfulam, Hong Kong, China
- Shenzhen Key Laboratory for Innovative Technology in Orthopaedic Trauma, The University of Hong Kong Shenzhen Hospital, 1 Haiyuan 1st Road, Futian District, Shenzhen, China
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27
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Chen Z, Li C, Ni Y, Kong F, Zhang Y, Kong A, Shan Y. TCNQ-induced in-situ electrochemical deposition for the synthesis of silver nanodendrites as efficient bifunctional electrocatalysts. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.03.222] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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28
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Liu X, Jin C, Wu L, Dong S, Zeng S, Li J. Hic74, a novel alanine and glycine rich matrix protein related to nacreous layer formation in the mollusc Hyriopsis cumingii. AQUACULTURE AND FISHERIES 2017. [DOI: 10.1016/j.aaf.2017.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Zhou X, Tamura N, Mi Z, Lei J, Yan J, Zhang L, Deng W, Ke F, Yue B, Chen B. Reversal in the Size Dependence of Grain Rotation. PHYSICAL REVIEW LETTERS 2017; 118:096101. [PMID: 28306305 DOI: 10.1103/physrevlett.118.096101] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2016] [Indexed: 06/06/2023]
Abstract
The conventional belief, based on the Read-Shockley model for the grain rotation mechanism, has been that smaller grains rotate more under stress due to the motion of grain boundary dislocations. However, in our high-pressure synchrotron Laue x-ray microdiffraction experiments, 70 nm nickel particles are found to rotate more than any other grain size. We infer that the reversal in the size dependence of the grain rotation arises from the crossover between the grain boundary dislocation-mediated and grain interior dislocation-mediated deformation mechanisms. The dislocation activities in the grain interiors are evidenced by the deformation texture of nickel nanocrystals. This new finding reshapes our view on the mechanism of grain rotation and helps us to better understand the plastic deformation of nanomaterials, particularly of the competing effects of grain boundary and grain interior dislocations.
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Affiliation(s)
- Xiaoling Zhou
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - Nobumichi Tamura
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - Zhongying Mi
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
| | - Jialin Lei
- Department of Chemistry and Biochemistry, University of California, Los Angeles, California 90095, USA
| | - Jinyuan Yan
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - Lingkong Zhang
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
| | - Wen Deng
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
| | - Feng Ke
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
| | - Binbin Yue
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
| | - Bin Chen
- Center for High Pressure Science and Technology Advanced Research, Pudong, Shanghai 201203, China
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30
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Gerber O, Pichon BP, Ihiawakrim D, Florea I, Moldovan S, Ersen O, Begin D, Grenèche JM, Lemonnier S, Barraud E, Begin-Colin S. Synthesis engineering of iron oxide raspberry-shaped nanostructures. NANOSCALE 2017; 9:305-313. [PMID: 27910971 DOI: 10.1039/c6nr07567c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Magnetic porous nanostructures consisting of oriented aggregates of iron oxide nanocrystals display very interesting properties such as a lower oxidation state of magnetite, and enhanced saturation magnetization in comparison with individual nanoparticles of similar sizes and porosity. However, the formation mechanism of these promising nanostructures is not well understood, which hampers the fine tuning of their magnetic properties, for instance by doping them with other elements. Therefore the formation mechanism of porous raspberry shaped nanostructures (RSNs) synthesized by a one-pot polyol solvothermal method has been investigated in detail from the early stages by using a wide panel of characterization techniques, and especially by performing original in situ HR-TEM studies in temperature. A time-resolved study showed the intermediate formation of an amorphous iron alkoxide phase with a plate-like lamellar structure (PLS). Then, the fine investigation of PLS transformation upon heating up to 500 °C confirmed that the synthesis of RSNs involves two iron precursors: the starting one (hydrated iron chlorides) and the in situ formed iron alkoxide precursor which decomposes with time and heating and contributes to the growth step of nanostructures. Such an understanding of the formation mechanism of RSNs is necessary to envision efficient and rational enhancement of their magnetic properties.
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Affiliation(s)
- O Gerber
- Institut de Physique et Chimie des Matériaux de Strasbourg, 23 rue du Loess, BP 43, 67037, Strasbourg Cedex 2, France.
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31
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Wu J, Shan H, Chen W, Gu X, Tao P, Song C, Shang W, Deng T. In Situ Environmental TEM in Imaging Gas and Liquid Phase Chemical Reactions for Materials Research. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:9686-9712. [PMID: 27628711 DOI: 10.1002/adma.201602519] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/10/2016] [Indexed: 05/26/2023]
Abstract
Gas and liquid phase chemical reactions cover a broad range of research areas in materials science and engineering, including the synthesis of nanomaterials and application of nanomaterials, for example, in the areas of sensing, energy storage and conversion, catalysis, and bio-related applications. Environmental transmission electron microscopy (ETEM) provides a unique opportunity for monitoring gas and liquid phase reactions because it enables the observation of those reactions at the ultra-high spatial resolution, which is not achievable through other techniques. Here, the fundamental science and technology developments of gas and liquid phase TEM that facilitate the mechanistic study of the gas and liquid phase chemical reactions are discussed. Combined with other characterization tools integrated in TEM, unprecedented material behaviors and reaction mechanisms are observed through the use of the in situ gas and liquid phase TEM. These observations and also the recent applications in this emerging area are described. The current challenges in the imaging process are also discussed, including the imaging speed, imaging resolution, and data management.
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Affiliation(s)
- Jianbo Wu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Hao Shan
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Wenlong Chen
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Xin Gu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Peng Tao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Chengyi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Rd., Shanghai, 200240, People's Republic of China
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32
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Bari S, Chatterjee A, Mishra S. Ultrasonication assisted and surfactant mediated synergistic approach for synthesis of calcium sulfate nano-dendrites. ULTRASONICS SONOCHEMISTRY 2016; 31:39-50. [PMID: 26964922 DOI: 10.1016/j.ultsonch.2015.11.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 11/10/2015] [Accepted: 11/24/2015] [Indexed: 05/17/2023]
Abstract
Calcium sulfate (CaSO4) nano-dendrimers were fabricated successfully via ultrasonic irradiation method using calcium chloride [CaCl2] and ammonium per sulfate [(NH4)2SO4] as precursors in aqueous solution by using cetyl trimethyl ammonium bromide (CTAB) as chemical surfactants. Diffusion-induced branching growth mechanism (DIBGM), influenced with the action of head-group and hydrocarbon chain effect of cationic surfactants, was the backbone in the formation of CaSO4 nano-dendrites. Fourier Transform Infra-red Spectroscopy (FTIR), X-Ray powder Diffraction (XRD), Atomic Emission Spectroscopy (AES), Selected Area Electron Diffraction (SAED), Field-Emission Scanning Electron Microscopy (FE-SEM), Energy-Dispersive Spectroscopy (EDS), Dynamic Light Spectroscopy (DLS) and BET surface area analyzer were used to characterize the products. Results obtained were compared with conventional stirring method that proved the superiority of sonication method to obtain well-crystalline nanostructures. Also, surfactant concentration, sonication frequency and time were noticed as the critical factors to generate such absolute morphologies at nano-crystalline size.
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Affiliation(s)
- Sarang Bari
- University Institute of Chemical Technology, North Maharashtra University, Jalgaon 425001, Maharashtra, India
| | - Aniruddha Chatterjee
- University Institute of Chemical Technology, North Maharashtra University, Jalgaon 425001, Maharashtra, India.
| | - Satyendra Mishra
- University Institute of Chemical Technology, North Maharashtra University, Jalgaon 425001, Maharashtra, India.
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33
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Li D, Xue J, Bai X. Synthesis of ZnWO4/CdWO4 core–shell structured nanorods formed by an oriented attachment mechanism with enhanced photocatalytic performances. CrystEngComm 2016. [DOI: 10.1039/c5ce01858g] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have described the oriented attachment mechanism in which CdWO4 nanorods obviously act as an epitaxial ‘substrate’ and guide the ZnWO4 aggregation process for the formation of CdWO4 nanorod based aggregated structures.
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Affiliation(s)
- Di Li
- School of Metallurgical Engineering
- Xi'an University of Architecture and Technology
- Xi'an, China
| | - Juanqin Xue
- School of Metallurgical Engineering
- Xi'an University of Architecture and Technology
- Xi'an, China
| | - Xiaojuan Bai
- Academy of State Administration of Grain P.R.C
- Beijing 100037, China
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Yan G, Zhao G, He F. Solvothermal Synthesis of Single-Crystal Magnetite Hollow Sub-Microspheres: A Novel Formation Mechanism and Magnetic Properties. Aust J Chem 2016. [DOI: 10.1071/ch15662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
In this paper, single-crystal magnetite hollow sub-microspheres with a narrow diameter distribution are synthesized through a simple solvothermal process in ethylene glycol in the presence of urea and a small amount of water. The determining role of water in the solvothermal synthesis is studied. It is found that a small amount of water is crucial for the formation of the magnetite hollow spheres. A novel formation mechanism of the magnetite hollow spheres is proposed based on the bubble-assisted Ostwald ripening. It is believed that the appropriate amount of CO2 gas bubbles produced in situ by urea hydrolysis is crucial for the formation of hollow spheres. Because of the existence of gas microbubbles, magnetite solid spheres with a loose core and compact shell form, which is the key factor for the following inside-out Ostwald ripening and the formation of the hollow spheres. Thus, by simple changing of the water dosage, magnetite hollow spheres with different diameters and shell thicknesses are obtained controllably. The magnetic properties of the obtained magnetite hollow spheres are studied. It is found that the saturation magnetization of the magnetite hollow sub-microspheres decreases with the increasing shell thickness, whereas the coercivity and remanent magnetization increase with increasing shell thickness.
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35
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Liu J, Wu Z, Tian Q, Wu W, Xiao X. Shape-controlled iron oxide nanocrystals: synthesis, magnetic properties and energy conversion applications. CrystEngComm 2016. [DOI: 10.1039/c6ce01307d] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Iron oxide nanocrystals (IONCs) with various geometric morphologies show excellent physical and chemical properties and have received extensive attention in recent years.
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Affiliation(s)
- Jun Liu
- School of Physics and Technology and School of Printing and Packaging
- Wuhan University
- Wuhan 430072, PR China
| | - Zhaohui Wu
- School of Physics and Technology and School of Printing and Packaging
- Wuhan University
- Wuhan 430072, PR China
| | - Qingyong Tian
- School of Physics and Technology and School of Printing and Packaging
- Wuhan University
- Wuhan 430072, PR China
| | - Wei Wu
- School of Physics and Technology and School of Printing and Packaging
- Wuhan University
- Wuhan 430072, PR China
- Suzhou Research Institute of Wuhan University
- Suzhou 215000, PR China
| | - Xiangheng Xiao
- School of Physics and Technology and School of Printing and Packaging
- Wuhan University
- Wuhan 430072, PR China
- Suzhou Research Institute of Wuhan University
- Suzhou 215000, PR China
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36
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Zheng X, Cheng M, Xiang L, Su J, Zhou Y, Xie L, Zhang R. Cloning and identification of a YY-1 homolog as a potential transcription factor from Pinctada fucata. Gene 2015; 572:108-115. [PMID: 26151893 DOI: 10.1016/j.gene.2015.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Revised: 05/22/2015] [Accepted: 07/01/2015] [Indexed: 01/02/2023]
Abstract
Biomineralization is an important and ubiquitous process in organisms. The shell formation of mollusks is a typical biomineral physical activity and is used as a canonical model in biomineralization research. Most recent studies focused on the identification of matrix proteins involved in shell formation; however, little is known about their transcriptional regulation mechanism, especially the transcription factors involved in shell formation. In this study, we identified a homolog of the YY-1 transcriptional factor from Pinctada fucata, named Pf-YY-1, and characterized its expression pattern and biological functions. Pf-YY-1 has a typical zinc finger motif highly similar to those in humans, mice, and other higher organisms, which indicated its DNA-binding capability and its function as a transcription factor. Pf-YY-1 is ubiquitously expressed in many tissues, but at a higher level in the mantle, which suggested a role in biomineralization. The expression pattern of Pf-YY-1 during pearl sac development was quite similar to, and was synchronized with, those of Prisilkin-39, ACCBP, and other genes involved in biomineralization, which also suggested its function in biomineralization.
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Affiliation(s)
- Xiangnan Zheng
- Institute of Marine Biotechnology, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Minzhang Cheng
- Institute of Marine Biotechnology, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Liang Xiang
- Institute of Marine Biotechnology, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Jingtan Su
- Institute of Marine Biotechnology, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yujuan Zhou
- Chinese National Human Genome Center, Beijing 100084, China
| | - Liping Xie
- Institute of Marine Biotechnology, School of Life Sciences, Tsinghua University, Beijing 100084, China; Protein Science Laboratory of the Ministry of Education, Tsinghua University, Beijing 100084, China.
| | - Rongqing Zhang
- Institute of Marine Biotechnology, School of Life Sciences, Tsinghua University, Beijing 100084, China; Protein Science Laboratory of the Ministry of Education, Tsinghua University, Beijing 100084, China.
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37
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Abdellatif M, Abdelrasoul G, Scarpellini A, Marras S, Diaspro A. Induced growth of dendrite gold nanostructure by controlling self-assembly aggregation dynamics. J Colloid Interface Sci 2015; 458:266-72. [DOI: 10.1016/j.jcis.2015.07.055] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 07/23/2015] [Accepted: 07/23/2015] [Indexed: 12/01/2022]
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The AP-1 transcription factor homolog Pf-AP-1 activates transcription of multiple biomineral proteins and potentially participates in Pinctada fucata biomineralization. Sci Rep 2015; 5:14408. [PMID: 26404494 PMCID: PMC4585884 DOI: 10.1038/srep14408] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 08/26/2015] [Indexed: 12/25/2022] Open
Abstract
Activator protein-1 (AP-1) is an important bZIP transcription factor that regulates a series of physiological processes by specifically activating transcription of several genes, and one of its well-chartered functions in mammals is participating in bone mineralization. We isolated and cloned the complete cDNA of a Jun/AP-1 homolog from Pinctada fucata and called it Pf-AP-1. Pf-AP-1 had a highly conserved bZIP region and phosphorylation sites compared with those from mammals. A tissue distribution analysis showed that Pf-AP-1 was ubiquitously expressed in P. fucata and the mRNA level of Pf-AP-1 is extremely high in mantle. Pf-AP-1 expression was positively associated with multiple biomineral proteins in the mantle. The luciferase reporter assay in a mammalian cell line showed that Pf-AP-1 significantly up-regulates the transcriptional activity of the promoters of KRMP, Pearlin, and Prisilkin39. Inhibiting the activity of Pf-AP-1 depressed the expression of multiple matrix proteins. Pf-AP-1 showed a unique expression pattern during shell regeneration and pearl sac development, which was similar to the pattern observed for biomineral proteins. These results suggest that the Pf-AP-1 AP-1 homolog is an important transcription factor that regulates transcription of several biomineral proteins simultaneously and plays a role in P. fucata biomineralization, particularly during pearl and shell formation.
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39
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Kumar R, Singh RK, Dubey PK, Singh DP, Yadav RM. Self-Assembled Hierarchical Formation of Conjugated 3D Cobalt Oxide Nanobead-CNT-Graphene Nanostructure Using Microwaves for High-Performance Supercapacitor Electrode. ACS APPLIED MATERIALS & INTERFACES 2015; 7:15042-51. [PMID: 26086175 DOI: 10.1021/acsami.5b04336] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Here we report the electrochemical performance of a interesting three-dimensional (3D) structures comprised of zero-dimensional (0D) cobalt oxide nanobeads, one-dimensional (1D) carbon nanotubes and two-dimensional (2D) graphene, stacked hierarchically. We have synthesized 3D self-assembled hierarchical nanostructure comprised of cobalt oxide nanobeads (Co-nb), carbon nanotubes (CNTs), and graphene nanosheets (GNSs) for high-performance supercapacitor electrode application. This 3D self-assembled hierarchical nanostructure Co3O4 nanobeads-CNTs-GNSs (3D:Co-nb@CG) is grown at a large scale (gram) through simple, facile, and ultrafast microwave irradiation (MWI). In 3D:Co-nb@CG nanostructure, Co3O4 nanobeads are attached to the CNT surfaces grown on GNSs. Our ultrafast, one-step approach not only renders simultaneous growth of cobalt oxide and CNTs on graphene nanosheets but also institutes the intrinsic dispersion of carbon nanotubes and cobalt oxide within a highly conductive scaffold. The 3D:Co-nb@CG electrode shows better electrochemical performance with a maximum specific capacitance of 600 F/g at the charge/discharge current density of 0.7A/g in KOH electrolyte, which is 1.56 times higher than that of Co3O4-decorated graphene (Co-np@G) nanostructure. This electrode also shows a long cyclic life, excellent rate capability, and high specific capacitance. It also shows high stability after few cycles (550 cycles) and exhibits high capacitance retention behavior. It was observed that the supercapacitor retained 94.5% of its initial capacitance even after 5000 cycles, indicating its excellent cyclic stability. The synergistic effect of the 3D:Co-nb@CG appears to contribute to the enhanced electrochemical performances.
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Affiliation(s)
- Rajesh Kumar
- †Center for Semiconductor Components, State University of Campinas (UNICAMP), 13083-870 Campinas, Sao Paulo, Brazil
| | - Rajesh Kumar Singh
- ‡Department of Physics, Indian Institute of Technology (Banaras Hindu University), Varanasi 221005, India
| | - Pawan Kumar Dubey
- §Nanotechnology Application Centre, University of Allahabad, Allahabad 211002, India
| | - Dinesh Pratap Singh
- ∥Departamento de F́ısica, Universidad de Santiago de Chile, Avenida Ecuador 3493, Estacíon Central, Santiago 9170124, Chile
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40
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Enhanced capacitance performance of Al2O3–TiO2 composite thin film via sol–gel using double chelators. J Colloid Interface Sci 2015; 443:170-6. [DOI: 10.1016/j.jcis.2014.11.038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 11/08/2014] [Accepted: 11/16/2014] [Indexed: 10/24/2022]
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41
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Zhu M, Zhang X, Zhou Y, Zhuo C, Huang J, Li S. Facile solvothermal synthesis of porous ZnFe2O4 microspheres for capacitive pseudocapacitors. RSC Adv 2015. [DOI: 10.1039/c5ra00447k] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
ZnFe2O4 microspheres, assembled by many primary nanocrystals, have been fabricated via a facile and cost-effective solvothermal approach and applied as pseudocapacitor electrode material.
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Affiliation(s)
- Maiyong Zhu
- School of Materials Science & Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Xin Zhang
- School of Materials Science & Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Yong Zhou
- School of Materials Science & Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Changhui Zhuo
- School of Materials Science & Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Juncheng Huang
- School of Materials Science & Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Songjun Li
- School of Materials Science & Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
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42
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Liu X, Koposova E, Offenhäusser A, Mourzina Y. Self-assembly of platinum nanoparticles and coordination-driven assembly with porphyrin. RSC Adv 2015. [DOI: 10.1039/c5ra13931g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The easily accessible surfaces of Pt nanostructures were demonstrated by two kinds of assembly processes.
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Affiliation(s)
- Xiao Liu
- Peter Grünberg Institut-8
- Forschungszentrum Jülich GmbH and Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology
- 52425 Jülich
- Germany
| | - Ekaterina Koposova
- Peter Grünberg Institut-8
- Forschungszentrum Jülich GmbH and Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology
- 52425 Jülich
- Germany
- Institute of Chemistry
| | - Andreas Offenhäusser
- Peter Grünberg Institut-8
- Forschungszentrum Jülich GmbH and Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology
- 52425 Jülich
- Germany
| | - Yulia Mourzina
- Peter Grünberg Institut-8
- Forschungszentrum Jülich GmbH and Jülich Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology
- 52425 Jülich
- Germany
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43
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Lee JI, Ryu JH. Pulsed laser ablation of hydroxyapatite in ethanol. JOURNAL OF THE KOREAN CRYSTAL GROWTH AND CRYSTAL TECHNOLOGY 2014. [DOI: 10.6111/jkcgct.2014.24.5.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kumar SG, Rao KSRK. Polymorphic phase transition among the titania crystal structures using a solution-based approach: from precursor chemistry to nucleation process. NANOSCALE 2014; 6:11574-632. [PMID: 24969423 DOI: 10.1039/c4nr01657b] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Nanocrystalline titania are a robust candidate for various functional applications owing to its non-toxicity, cheap availability, ease of preparation and exceptional photochemical as well as thermal stability. The uniqueness in each lattice structure of titania leads to multifaceted physico-chemical and opto-electronic properties, which yield different functionalities and thus influence their performances in various green energy applications. The high temperature treatment for crystallizing titania triggers inevitable particle growth and the destruction of delicate nanostructural features. Thus, the preparation of crystalline titania with tunable phase/particle size/morphology at low to moderate temperatures using a solution-based approach has paved the way for further exciting areas of research. In this focused review, titania synthesis from hydrothermal/solvothermal method, conventional sol-gel method and sol-gel-assisted method via ultrasonication, photoillumination and ILs, thermolysis and microemulsion routes are discussed. These wet chemical methods have broader visibility, since multiple reaction parameters, such as precursor chemistry, surfactants, chelating agents, solvents, mineralizer, pH of the solution, aging time, reaction temperature/time, inorganic electrolytes, can be easily manipulated to tune the final physical structure. This review sheds light on the stabilization/phase transformation pathways of titania polymorphs like anatase, rutile, brookite and TiO2(B) under a variety of reaction conditions. The driving force for crystallization arising from complex species in solution coupled with pH of the solution and ion species facilitating the orientation of octahedral resulting in a crystalline phase are reviewed in detail. In addition to titanium halide/alkoxide, the nucleation of titania from other precursors like peroxo and layered titanates are also discussed. The non-aqueous route and ball milling-induced titania transformation is briefly outlined; moreover, the lacunae in understanding the concepts and future prospects in this exciting field are suggested.
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Affiliation(s)
- S Girish Kumar
- Department of Physics, Indian Institute of Science, Bangalore-560012, Karnataka, India.
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45
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Wang YJ, Xu CJ, Chen HY, Nie D, Liu YQ. Facile fabrication of porous flower-like α-Fe2O3 microspheres and their applications for water treatment. ACTA ACUST UNITED AC 2014. [DOI: 10.1179/1433075x14y.0000000245] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Y. J. Wang
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
| | - C. J. Xu
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
| | - H. Y. Chen
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
| | - D. Nie
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
| | - Y. Q. Liu
- School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
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Singh AV, Batuwangala M, Mundra R, Mehta K, Patke S, Falletta E, Patil R, Gade WN. Biomineralized anisotropic gold microplate-macrophage interactions reveal frustrated phagocytosis-like phenomenon: a novel paclitaxel drug delivery vehicle. ACS APPLIED MATERIALS & INTERFACES 2014; 6:14679-14689. [PMID: 25046687 DOI: 10.1021/am504051b] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This study reports a facile biomineralization route for gold microplates (GMPs) synthesis using bovine serum albumin (BSA) as a reductant and stabilizing agent. Adding BSA to HAuCl4 solution yields spontaneous versatile anisotropic and partially hollow GMPs upon aging. We hypothesize that the instantaneous protein denaturation at low pH enabled access to serine and threonine hydroxyl, and sulfhydryl groups of BSA, which act as a reductant and stabilizer, respectively. This reaction could be hastened by increasing the temperature well beyond 65 °C. Transmission electron microscopy/X-ray diffraction studies revealed highly crystalline and anisotropic structures (triangle, pentagon, and rectangle). Atomic force microscopy/scanning electron microscopy analyses demonstrated unique morphology of microplates with a partially void core and BSA mineralized edge structure. RAW 264.7 mice peritoneal macrophage-microplate interaction studies using live cell confocal imaging reveal that cells are capable of selectively internalizing smaller GMPs. Large GMPs are preferentially picked with sharp vertices but cannot be internalized and exhibit frustrated phagocytosis-like phenomenon. We explored particle phagocytosis as an actin mediated process that recruits phagosome-like acidic organelles, shown by a lysosensor probe technique. The biocompatible GMPs exhibited ∼70% paclitaxel (PCL) loading and sustained release of PCL, showing antitumor activity with the MCF-7 cell line, and could be a novel drug carrier for breast cancer therapy.
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Affiliation(s)
- Ajay Vikram Singh
- Department of Biomedical Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute , Troy, New York 12180, United States
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Affiliation(s)
- Choon Hwee Bernard Ng
- Department of Chemistry, National University of Singapore, 3 Science
Drive 3, Singapore 117543
| | - Wai Yip Fan
- Department of Chemistry, National University of Singapore, 3 Science
Drive 3, Singapore 117543
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48
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Abstract
An understanding of nanocrystal growth mechanisms is of significant importance for the design of novel materials. The development of liquid cells for transmission electron microscopy (TEM) has enabled direct observation of nanoparticle growth in a liquid phase. By tracking single particle growth trajectories with high spatial resolution, novel growth mechanisms have been revealed. In recent years, there has been an increasing interest in liquid cell TEM and its applications include real time imaging of nanoparticles, biological materials, liquids, and so on. This paper reviews the development of liquid cell TEM and the progress made in using such a wonderful tool to study the growth of nanoparticles (mostly metal nanoparticles). Achievements in the understanding of coalescence, shape control mechanisms, surfactant effects, etc. are highlighted. Other studies relevant to metal precipitation in liquids, such as electrochemical deposition, nanoparticle motion and electron beam effects, are also included. At the end, our perspectives on future challenges and opportunities in liquid cell TEM are provided.
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Affiliation(s)
- Hong-Gang Liao
- Materials Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA.
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Hughes CD, Simons M, Mackenzie CE, Van Houten B, Kad NM. Single molecule techniques in DNA repair: a primer. DNA Repair (Amst) 2014; 20:2-13. [PMID: 24819596 DOI: 10.1016/j.dnarep.2014.02.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 02/03/2014] [Indexed: 10/25/2022]
Abstract
A powerful new approach has become much more widespread and offers insights into aspects of DNA repair unattainable with billions of molecules. Single molecule techniques can be used to image, manipulate or characterize the action of a single repair protein on a single strand of DNA. This allows search mechanisms to be probed, and the effects of force to be understood. These physical aspects can dominate a biochemical reaction, where at the ensemble level their nuances are obscured. In this paper we discuss some of the many technical advances that permit study at the single molecule level. We focus on DNA repair to which these techniques are actively being applied. DNA repair is also a process that encompasses so much of what single molecule studies benefit--searching for targets, complex formation, sequential biochemical reactions and substrate hand-off to name just a few. We discuss how single molecule biophysics is poised to transform our understanding of biological systems, in particular DNA repair.
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Affiliation(s)
- Craig D Hughes
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK
| | - Michelle Simons
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK
| | - Cassidy E Mackenzie
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK
| | - Bennett Van Houten
- Department of Pharmacology and Chemical Biology, University of Pittsburgh Cancer Institute, University of Pittsburgh, Pittsburgh, PA, USA
| | - Neil M Kad
- School of Biological Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, UK.
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Abstract
It is well-believed that below a certain particle size, grain boundary-mediated plastic deformation (e.g., grain rotation, grain boundary sliding and diffusion) substitutes for conventional dislocation nucleation and motion as the dominant deformation mechanism. However, in situ probing of grain boundary processes of ultrafine nanocrystals during plastic deformation has not been feasible, precluding the direct exploration of the nanomechanics. Here we present the in situ texturing observation of bulk-sized platinum in a nickel pressure medium of various particle sizes from 500 nm down to 3 nm. Surprisingly, the texture strength of the same-sized platinum drops rapidly with decreasing grain size of the nickel medium, indicating that more active grain rotation occurs in the smaller nickel nanocrystals. Insight into these processes provides a better understanding of the plastic deformation of nanomaterials in a few-nanometer length scale.
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