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Yuan Y, Zhang K, Li X, Wu M, Wu Q, Liu J, Yang J, Zhang J. Morphology library of nanosilica based on a thermally induced deformable template. Chem Commun (Camb) 2021; 58:443-446. [PMID: 34904595 DOI: 10.1039/d1cc04402h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report a versatile platform for the synthesis of shape-tunable nanosilica based on a thermally induced deformable template with diverse morphologies ranging from spheres, horns, ultrathin nanosheets, and rings to belts. This was realized by creating soft templates from a pair of anionic/cationic surfactants.
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Affiliation(s)
- Yukun Yuan
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China.
| | - Kangmin Zhang
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China.
| | - Xiaofei Li
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China.
| | - Mingyuan Wu
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China. .,Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, Anhui University, Hefei 230601, China
| | - Qingyun Wu
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China. .,Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, Anhui University, Hefei 230601, China
| | - Jiuyi Liu
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China. .,Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, Anhui University, Hefei 230601, China
| | - Jianjun Yang
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China. .,Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, Anhui University, Hefei 230601, China
| | - Jianan Zhang
- School of Chemistry and Chemical Engineering, Anhui University, Hefei 230601, China. .,Anhui Province Key Laboratory of Environment-Friendly Polymer Materials, Anhui University, Hefei 230601, China.,Institute of Physical Science and Information Technology, Anhui University, Hefei 230601, China
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2
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Kundu P, Singh D, Singh A, Sahoo SK. Cancer Nanotheranostics: A Nanomedicinal Approach for Cancer Therapy and Diagnosis. Anticancer Agents Med Chem 2021; 20:1288-1299. [PMID: 31429694 DOI: 10.2174/1871520619666190820145930] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 05/29/2019] [Accepted: 06/03/2019] [Indexed: 12/27/2022]
Abstract
The panorama of cancer treatment has taken a considerable leap over the last decade with the advancement in the upcoming novel therapies combined with modern diagnostics. Nanotheranostics is an emerging science that holds tremendous potential as a contrivance by integrating therapy and imaging in a single probe for cancer diagnosis and treatment thus offering the advantage like tumor-specific drug delivery and at the same time reduced side effects to normal tissues. The recent surge in nanomedicine research has also paved the way for multimodal theranostic nanoprobe towards personalized therapy through interaction with a specific biological system. This review presents an overview of the nano theranostics approach in cancer management and a series of different nanomaterials used in theranostics and the possible challenges with future directions.
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Affiliation(s)
- Paromita Kundu
- Laboratory of Nanomedicine, Institute of Life Sciences, Nalco Square, Chandrasekharpur, Bhubaneswar, Odisha, India
| | - Deepika Singh
- Laboratory of Nanomedicine, Institute of Life Sciences, Nalco Square, Chandrasekharpur, Bhubaneswar, Odisha, India
| | - Abhalaxmi Singh
- Laboratory of Nanomedicine, Institute of Life Sciences, Nalco Square, Chandrasekharpur, Bhubaneswar, Odisha, India
| | - Sanjeeb K Sahoo
- Laboratory of Nanomedicine, Institute of Life Sciences, Nalco Square, Chandrasekharpur, Bhubaneswar, Odisha, India
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3
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A ratiometric fluorescent core-shell nanoprobe for sensing and imaging of zinc(II) in living cell and zebrafish. Mikrochim Acta 2018; 185:523. [DOI: 10.1007/s00604-018-3066-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 10/20/2018] [Indexed: 12/29/2022]
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4
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Wang D, Zhang C, Ren L, Li D, Yu J. Biodegradable AIEgen-functionalised mesoporous bioactive glass nanoparticles for drug delivery and cell imaging. Inorg Chem Front 2018. [DOI: 10.1039/c7qi00575j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
AIEgen-functionalised mesoporous bioactive glass nanospheres with excellent degradability in an acid environment show potential application in drug delivery and cell imaging.
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Affiliation(s)
- Duo Wang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Chengkai Zhang
- Key Laboratory for Molecular Enzymonlogy & Engineering
- The Ministry of Education
- Jilin University
- Changchun
- P. R. China
| | - Li Ren
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
| | - Dongdong Li
- Department of Materials Science
- Key Laboratory of Automobile Materials of MOE
- Jilin University
- Changchun 130012
- P. R. China
| | - Jihong Yu
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- College of Chemistry
- Jilin University
- Changchun 130012
- P. R. China
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5
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Yang S, You W, Song Y, Yang S, Che R. Controllable one-pot synthesis of FeSe2 nanooctahedra embedded microtubes by a sacrificial self-template method. NEW J CHEM 2017. [DOI: 10.1039/c6nj03180c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A controllable solvothermal method was used to fabricate FeSe2 alloys with special microtube and nanosheet morphology.
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Affiliation(s)
- Sheng Yang
- Laboratory of Advanced Materials
- Fudan University
- Shanghai 200438
- P. R. China
| | - Wenbin You
- Laboratory of Advanced Materials
- Fudan University
- Shanghai 200438
- P. R. China
| | - Yuanzhe Song
- Laboratory of Advanced Materials
- Fudan University
- Shanghai 200438
- P. R. China
| | - Shijun Yang
- Laboratory of Advanced Materials
- Fudan University
- Shanghai 200438
- P. R. China
| | - Renchao Che
- Laboratory of Advanced Materials
- Fudan University
- Shanghai 200438
- P. R. China
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6
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Lewis CS, Torres L, Miyauchi JT, Rastegar C, Patete JM, Smith JM, Wong SS, Tsirka SE. Absence of Cytotoxicity towards Microglia of Iron Oxide (α-Fe 2O 3) Nanorhombohedra. Toxicol Res (Camb) 2016; 5:836-847. [PMID: 27274811 PMCID: PMC4890976 DOI: 10.1039/c5tx00421g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Accepted: 02/04/2016] [Indexed: 12/11/2022] Open
Abstract
Understanding the nature of interactions between nanomaterials, such as commercially ubiquitous hematite (α-Fe2O3) Nanorhombohedra (N-Rhomb) and biological systems is of critical importance for gaining insight into the practical applicability of nanomaterials. Microglia represent the first line of defense in the central nervous system (CNS) during severe injury or disease such as Parkinson's and Alzheimer's disease as illustrative examples. Hence, to analyze the potential cytotoxic effect of nanorhombohedra exposure in the presence of microglia, we have synthesized Rhodamine B (RhB) labeled-α-Fe2O3 N-Rhomb, with lengths of 47 ± 10 nm and widths of 35 ± 8 nm. Internalization of RhB labeled-α-Fe2O3 N-Rhomb by microglia in the mouse brain was observed, and a dose-dependent increase in the cellular iron content as probed by cellular fluorescence was detected in cultured microglia after nanoparticle exposure. The cells maintained clear functional viability, exhibiting little to no cytotoxic effects after 24 and 48 hours at acceptable, physiological concentrations. Importantly, the nanoparticle exposure did not induce microglial cells to produce either tumor necrosis factor alpha (TNFα) or interleukin 1-beta (IL1β), two pro-inflammatory cytokines, nor did exposure induce the production of nitrites and reactive oxygen species (ROS), which are common indicators for the onset of inflammation. Finally, we propose that under the conditions of our experiments, i.e. in the presence of RhB labeled-α-Fe2O3 N-Rhomb maintaining concentrations of up to 100 µg/mL after 48 hours of incubation, the in vitro and in vivo internalization of RhB labeled-α-Fe2O3 N-Rhomb are likely to be clathrin-dependent, which represents a conventional mechanistic uptake route for most cells. Given the crucial role that microglia play in many neurological disorders, understanding the potential cytotoxic effects of these nanostructures is of fundamental importance if they are to be used in a therapeutic setting.
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Affiliation(s)
- Crystal S. Lewis
- Department of Chemistry
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-3400
, USA
.
| | - Luisa Torres
- Department of Pharmacological Sciences
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-8651
, USA
.
| | - Jeremy T. Miyauchi
- Department of Pharmacological Sciences
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-8651
, USA
.
| | - Cyrus Rastegar
- Department of Pharmacological Sciences
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-8651
, USA
.
| | - Jonathan M. Patete
- Department of Chemistry
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-3400
, USA
.
| | - Jacqueline M. Smith
- Department of Chemistry
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-3400
, USA
.
| | - Stanislaus S. Wong
- Department of Chemistry
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-3400
, USA
.
- Condensed Matter Physics and Materials Science Department
, Building 480
, Brookhaven National Laboratory
,
Upton
, New York 11973
, USA
| | - Stella E. Tsirka
- Department of Pharmacological Sciences
, State University of New York at Stony Brook
,
Stony Brook
, New York 11794-8651
, USA
.
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7
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Synthesis, characterization and biomedical application of multifunctional luminomagnetic core–shell nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 46:32-40. [DOI: 10.1016/j.msec.2014.10.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 08/08/2014] [Accepted: 10/02/2014] [Indexed: 01/10/2023]
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8
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Lim EK, Kim T, Paik S, Haam S, Huh YM, Lee K. Nanomaterials for Theranostics: Recent Advances and Future Challenges. Chem Rev 2014; 115:327-94. [DOI: 10.1021/cr300213b] [Citation(s) in RCA: 916] [Impact Index Per Article: 91.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Eun-Kyung Lim
- Department
of Radiology, Yonsei University, Seoul 120-752, Korea
- BioNanotechnology
Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806, Korea
| | - Taekhoon Kim
- Department
of Chemistry, Korea University, Seoul 136-701, Korea
- Electronic
Materials Laboratory, Samsung Advanced Institute of Technology, Mt. 14-1,
Nongseo-Ri, Giheung-Eup, Yongin-Si, Gyeonggi-Do 449-712, Korea
| | - Soonmyung Paik
- Severance
Biomedical Research Institute, Yonsei University College of Medicine, Seoul 120-749, Korea
- Division
of Pathology, NSABP Foundation, Pittsburgh, Pennsylvania 15212, United States
| | - Seungjoo Haam
- Department
of Chemical and Biomolecular Engineering, Yonsei University, Seoul 120-749, Korea
| | - Yong-Min Huh
- Department
of Radiology, Yonsei University, Seoul 120-752, Korea
| | - Kwangyeol Lee
- Department
of Chemistry, Korea University, Seoul 136-701, Korea
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9
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Cheng K, Sun Z, Zhou Y, Zhong H, Kong X, Xia P, Guo Z, Chen Q. Preparation and biological characterization of hollow magnetic Fe3O4@C nanoparticles as drug carriers with high drug loading capability, pH-control drug release and MRI properties. Biomater Sci 2013; 1:965-974. [DOI: 10.1039/c3bm60087d] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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10
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Koenigsmann C, Tan Z, Peng H, Sutter E, Jacobskind J, Wong SS. Multifunctional Nanochemistry: Ambient, Electroless, Template-Based Synthesis and Characterization of Segmented Bimetallic Pd/Au and Pd/Pt Nanowires as High-Performance Electrocatalysts and Nanomotors. Isr J Chem 2012. [DOI: 10.1002/ijch.201200052] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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11
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Sharma P, Bengtsson NE, Walter GA, Sohn HB, Zhou G, Iwakuma N, Zeng H, Grobmyer SR, Scott EW, Moudgil BM. Gadolinium-doped silica nanoparticles encapsulating indocyanine green for near infrared and magnetic resonance imaging. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:2856-2868. [PMID: 22744832 DOI: 10.1002/smll.201200258] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2012] [Revised: 03/30/2012] [Indexed: 06/01/2023]
Abstract
Clinical applications of the indocyanine green (ICG) dye, the only near infrared (NIR) imaging dye approved by the Food and Drug Administration (FDA) in the USA, are limited due to rapid protein binding, fast clearance, and instability in physiologically relevant conditions. Encapsulating ICG in silica particles can enhance its photostability, minimize photobleaching, increase the signal-to-noise (S/N) ratio and enable in vivo studies. Furthermore, a combined magnetic resonance (MR) and NIR imaging particulate can integrate the advantage of high-resolution 3D anatomical imaging with high-sensitivity deep-tissue in-vivo fluorescent imaging. In this report, a novel synthesis technique that can achieve these goals is presented. A reverse-microemulsion-based synthesis protocol is employed to produce 25 nm ICG-doped silica nanoparticles (NPs). The encapsulation of ICG is achieved by manipulating coulombic attractions with bivalent ions and aminated silanes and carrying out silica synthesis in salt-catalyzed, mildly basic pH conditions using dioctyl sulfosuccinate (AOT)/heptane/water microemulsion system. Furthermore, paramagnetic properties are imparted by chelating paramagnetic Gd to the ICG-doped silica NPs. Aqueous ICG-dye-doped silica NPs show increased photostability (over a week) and minimal photobleaching as compared to the dye alone. The MR and optical imaging capabilities of these particles are demonstrated through phantom, in vitro and in vivo experiments. The described particles have the potential to act as theranostic agents by combining photodynamic therapy through the absorption of NIR irradiated light.
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Affiliation(s)
- Parvesh Sharma
- Materials Science and Engineering & Particle Engineering Research Center, University of Florida, Gainesville, FL, 32611, USA.
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13
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Peng J, Feng LN, Zhang K, Li XH, Jiang LP, Zhu JJ. Calcium Carbonate-Gold Nanocluster Hybrid Spheres: Synthesis and Versatile Application in Immunoassays. Chemistry 2012; 18:5261-8. [DOI: 10.1002/chem.201102876] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2011] [Revised: 12/31/2011] [Indexed: 01/01/2023]
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14
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Barreto JA, O'Malley W, Kubeil M, Graham B, Stephan H, Spiccia L. Nanomaterials: applications in cancer imaging and therapy. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:H18-40. [PMID: 21433100 DOI: 10.1002/adma.201100140] [Citation(s) in RCA: 616] [Impact Index Per Article: 47.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Indexed: 05/11/2023]
Abstract
The application of nanomaterials (NMs) in biomedicine is increasing rapidly and offers excellent prospects for the development of new non-invasive strategies for the diagnosis and treatment of cancer. In this review, we provide a brief description of cancer pathology and the characteristics that are important for tumor-targeted NM design, followed by an overview of the different types of NMs explored to date, covering synthetic aspects and approaches explored for their application in unimodal and multimodal imaging, diagnosis and therapy. Significant synthetic advances now allow for the preparation of NMs with highly controlled geometry, surface charge, physicochemical properties, and the decoration of their surfaces with polymers and bioactive molecules in order to improve biocompatibility and to achieve active targeting. This is stimulating the development of a diverse range of nanometer-sized objects that can recognize cancer tissue, enabling visualization of tumors, delivery of anti-cancer drugs and/or the destruction of tumors by different therapeutic techniques.
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Affiliation(s)
- José A Barreto
- School of Chemistry, Monash University Clayton, VIC, Australia
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Stötzel J, Lützenkirchen-Hecht D, Frahm R. A new stand-alone QEXAFS data acquisition system for in situ studies. JOURNAL OF SYNCHROTRON RADIATION 2011; 18:165-175. [PMID: 21335902 DOI: 10.1107/s0909049510051897] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2010] [Accepted: 12/10/2010] [Indexed: 05/30/2023]
Abstract
To meet the demands of the QEXAFS (quick-scanning extended X-ray absorption fine structure) technique for a fast, user-friendly and flexible data acquisition a new stand-alone system with new software exploiting a multi-functional USB board was designed. The chosen approach allows the scanning of several analogue and digital data sources with up to 500000 samples each second over hours storable in binary or ASCII format without any dead-time. At the same time it is possible to visualize the acquired data instantaneously which provides a maximum of interactivity during the running experiment and also optimal conditions to select the best suited beamline and detector settings prior to each measurement. Furthermore, the QEXAFS monochromator and typically three current amplifiers are entirely controlled by the new software so that all monochromator settings can be synchronized with the data acquisition enabling programmed scans with alternating parameter sets. This versatile concept also enables the user to react immediately to changes in the sample during in situ studies. An interface to a three-axis stepper motor control unit is additionally included to control a sample stage which can again be synchronized with the data acquisition. Thus, spatially resolved scans and the usage of scan tools for sample alignment are feasible with the new system. Typical examples to demonstrate the features of the new data acquisition system are presented, the designed graphical user interface is described in detail and, furthermore, the crucial design parameters of a typical QEXAFS set-up are discussed.
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Affiliation(s)
- Jan Stötzel
- Fachbereich C - Physik, Universität Wuppertal, Gaussstrasse 20, 42097 Wuppertal, Germany.
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16
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Xuan R, Wu Q, Yin Y, Ge J. Magnetically assembled photonic crystal film for humidity sensing. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03790g] [Citation(s) in RCA: 135] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Yang X, Tang H, Cao K, Song H, Sheng W, Wu Q. Templated-assisted one-dimensional silica nanotubes: synthesis and applications. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm04516k] [Citation(s) in RCA: 97] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Liu L, Jiang J, Jin S, Xia Z, Tang M. Hydrothermal synthesis of β-bismuth oxide nanowires from particles. CrystEngComm 2011. [DOI: 10.1039/c0ce00773k] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Wang T, Zhang X, Pan Y, Miao X, Su Z, Wang C, Li X. Fabrication of doxorubicin functionalized gold nanorod probes for combined cancer imaging and drug delivery. Dalton Trans 2011; 40:9789-94. [DOI: 10.1039/c1dt10565e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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20
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Patzke GR, Zhou Y, Kontic R, Conrad F. Oxidische Nanomaterialien: Von der Synthese über den Mechanismus zur technologischen Innovation. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000235] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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21
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Patzke GR, Zhou Y, Kontic R, Conrad F. Oxide Nanomaterials: Synthetic Developments, Mechanistic Studies, and Technological Innovations. Angew Chem Int Ed Engl 2010; 50:826-59. [DOI: 10.1002/anie.201000235] [Citation(s) in RCA: 306] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2010] [Indexed: 11/07/2022]
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Manian MK, Iyengar GA, Lee KP, Kim NH, Shanmugasundaram K, Kang SH. Hierarchically-ordered electroactive silica-polyaniline nanohybrid: A novel material with versatile properties. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24245] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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Jańczewski D, Zhang Y, Das GK, Yi DK, Padmanabhan P, Bhakoo KK, Tan TTY, Selvan ST. Bimodal magnetic-fluorescent probes for bioimaging. Microsc Res Tech 2010; 74:563-76. [PMID: 20734412 DOI: 10.1002/jemt.20912] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2010] [Accepted: 06/24/2010] [Indexed: 12/17/2022]
Abstract
Fluorescent optical probes have been intensively used in the area of bio-imaging. In this review article, we describe the recent advancements in the synthesis and application of bimodal magnetic-fluorescent probes for bioimaging. The bimodal probes consist of fluorescent [semiconducting quantum dots (e.g., CdSe/ZnS) or rare-earth doped (e.g., NaYF(4) :Yb,Er)] nanoparticles (NPs) and magnetic (iron oxide or gadolinium based) NPs for optical and magnetic resonance (MR) imaging.
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Affiliation(s)
- Dominik Jańczewski
- Institute of Materials Research and Engineering, 3 Research Link, Singapore 117602
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Stötzel J, Lützenkirchen-Hecht D, Frahm R. A new flexible monochromator setup for quick scanning x-ray absorption spectroscopy. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2010; 81:073109. [PMID: 20687707 DOI: 10.1063/1.3458015] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A new monochromator setup for quick scanning x-ray absorption spectroscopy in the subsecond time regime is presented. Novel driving mechanics allow changing the energy range of the acquired spectra by remote control during data acquisition for the first time, thus dramatically increasing the flexibility and convenience of this method. Completely new experiments are feasible due to the fact that time resolution, edge energy, and energy range of the acquired spectra can be changed continuously within seconds without breaking the vacuum of the monochromator vessel and even without interrupting the measurements. The advanced mechanics are explained in detail and the performance is characterized with x-ray absorption spectra of pure metal foils. The energy scale was determined by a fast and accurate angular encoder system measuring the Bragg angle of the monochromator crystal with subarcsecond resolution. The Bragg angle range covered by the oscillating crystal can currently be changed from 0 degrees to 3.0 degrees within 20 s, while the mechanics are capable to move with frequencies of up to ca. 35 Hz, leading to ca. 14 ms/spectrum time resolution. A new software package allows performing programmed scan sequences, which enable the user to measure stepwise with alternating parameters in predefined time segments. Thus, e.g., switching between edges scanned with the same energy range is possible within one in situ experiment, while also the time resolution can be varied simultaneously. This progress makes the new system extremely user friendly and efficient to use for time resolved x-ray absorption spectroscopy at synchrotron radiation beamlines.
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Affiliation(s)
- J Stötzel
- Fachbereich C, Physik, Bergische Universität Wuppertal, Gaussstr. 20, 42097 Wuppertal, Germany.
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