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Song J, Feng S, Shi H, Han D, Liu G. Polystyrene microspheres with ultra-rough surfaces engineered using RIE technique and applied using SERS. Chem Commun (Camb) 2024; 60:2493-2496. [PMID: 38305898 DOI: 10.1039/d3cc05940e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
In this study, we successfully fabricated two ultra-rough surfaces based on polystyrene (PS) microspheres by employing the reactive ion etching (RIE) technique. Elemental analysis confirmed a stable AlF3 composition of the structures of these surfaces. We proposed the mechanism of the formation of these surfaces and performed SERS-related tests; the prepared substrates exhibited excellent SERS performance.
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Affiliation(s)
- Jizhe Song
- Qufu Normal University School of Physics and Physical Engineering, Shandong Prov Key Lab Laser Polarizat & Informat, Qufu 273100, P. R. China.
| | - Sujuan Feng
- Qufu Normal University School of Physics and Physical Engineering, Shandong Prov Key Lab Laser Polarizat & Informat, Qufu 273100, P. R. China.
| | - Haonan Shi
- Qufu Normal University School of Physics and Physical Engineering, Shandong Prov Key Lab Laser Polarizat & Informat, Qufu 273100, P. R. China.
| | - Daotong Han
- Qufu Normal University School of Physics and Physical Engineering, Shandong Prov Key Lab Laser Polarizat & Informat, Qufu 273100, P. R. China.
| | - Guangqiang Liu
- Qufu Normal University School of Physics and Physical Engineering, Shandong Prov Key Lab Laser Polarizat & Informat, Qufu 273100, P. R. China.
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2
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Ji Z, Liu X, Song Y, Zhong Y, Wang D, Chen B, Fang M, Nie X, Hou J, Ma J, Ma H, Xu X, Yi Z, Xu X. Space-Confined seeding and growth of ordered arrays of TiO2 hierarchical nanostructures. J Colloid Interface Sci 2023; 630:436-443. [DOI: 10.1016/j.jcis.2022.10.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/08/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022]
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3
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Taccola S, da Veiga T, Chandler JH, Cespedes O, Valdastri P, Harris RA. Micro-scale aerosol jet printing of superparamagnetic Fe 3O 4 nanoparticle patterns. Sci Rep 2022; 12:17931. [PMID: 36289308 PMCID: PMC9606284 DOI: 10.1038/s41598-022-22312-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/12/2022] [Indexed: 01/20/2023] Open
Abstract
The opportunity to create different patterns of magnetic nanoparticles on surfaces is highly desirable across many technological and biomedical applications. In this paper, this ability is demonstrated for the first time using a computer-controlled aerosol jet printing (AJP) technology. AJP is an emerging digitally driven, non-contact and mask-less printing process which has distinguishing advantages over other patterning technologies as it offers high-resolution and versatile direct-write deposition of a wide range of materials onto a variety of substrates. This research demonstrates the ability of AJP to reliably print large-area, fine-feature patterns of superparamagnetic iron oxide nanoparticles (SPIONs) onto both rigid material (glass) and soft and flexible materials (polydimethylsiloxane (PDMS) films and poly-L-lactic acid (PLLA) nanofilms). Investigation identified and controlled influential process variables which permitted feature sizes in the region of 20 μm to be realised. This method could be employed for a wide range of applications that require a flexible and responsive process that permits high yield and rapid patterning of magnetic material over large areas. As a first proof of concept, we present patterned magnetic nanofilms with enhanced manipulability under external magnetic field gradient control and which are capable of performing complex movements such as rotation and bending, with applicability to soft robotics and biomedical engineering applications.
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Affiliation(s)
- Silvia Taccola
- grid.9909.90000 0004 1936 8403Future Manufacturing Processes Research Group, University of Leeds, Leeds, UK
| | - Tomas da Veiga
- grid.9909.90000 0004 1936 8403STORM Lab, University of Leeds, Leeds, UK
| | - James H. Chandler
- grid.9909.90000 0004 1936 8403STORM Lab, University of Leeds, Leeds, UK
| | - Oscar Cespedes
- grid.9909.90000 0004 1936 8403School of Physics and Astronomy, University of Leeds, Leeds, UK
| | - Pietro Valdastri
- grid.9909.90000 0004 1936 8403STORM Lab, University of Leeds, Leeds, UK
| | - Russell A. Harris
- grid.9909.90000 0004 1936 8403Future Manufacturing Processes Research Group, University of Leeds, Leeds, UK
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4
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Huang Y, Tran H, Ober CK. High-Resolution Nanopatterning of Free-Standing, Self-Supported Helical Polypeptide Rod Brushes via Electron Beam Lithography. ACS Macro Lett 2021; 10:755-759. [PMID: 35549094 DOI: 10.1021/acsmacrolett.1c00187] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
In this study of nanopatterned helical poly(benzyl-l-glutamate) (PBLG) brushes, rod-type brush arrays were fabricated via an integrated process of high-resolution lithography and surface-initiated vapor deposition polymerization (SI-VDP). "Nanospikes" of polymer brushes with spacings of less than 100 nm were produced. The topology and areal behavior of the resulting patterned rod-like brushes were analyzed and compared with patterned coil-type brushes. A geometric study of these self-assembled "nanospikes" was carried out, and their cross sections were investigated via focused ion beam (FIB) and scanning electron microscopy (SEM). Furthermore, the presence of poly(N-isopropylacrylamide) (PNIPAM) brushes in unpatterned regions was shown to inhibit undesired "inter-spike" bridging of the PBLG brushes, resulting in more well-defined nanostructures. It was shown that rod-like polypeptide brushes are capable of self-segregation and become arranged vertically without any external support from their surroundings, to form a rod bundle end-point functional topography that could provide possible pathways for studies of model biological surfaces, directed assembly of nanoparticles, or binary mixed brush surfaces with dual properties.
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5
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Wang LM, Qdemat A, Petracic O, Kentzinger E, Rücker U, Zheng F, Lu PH, Wei XK, Dunin-Borkowski RE, Brückel T. Manipulation of dipolar magnetism in low-dimensional iron oxide nanoparticle assemblies. Phys Chem Chem Phys 2019; 21:6171-6177. [DOI: 10.1039/c9cp00302a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Trench-patterned iron oxide nanoparticles are switched between a superspin glass and a superferromagnetic state.
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Affiliation(s)
- Li-Ming Wang
- Jülich Centre for Neutron Science JCNS and Peter Grüberg Institut PGI
- JARA-FIT
- Jülich
- Germany
- Institute of High Energy Physics
| | - Asma Qdemat
- Jülich Centre for Neutron Science JCNS and Peter Grüberg Institut PGI
- JARA-FIT
- Jülich
- Germany
| | - Oleg Petracic
- Jülich Centre for Neutron Science JCNS and Peter Grüberg Institut PGI
- JARA-FIT
- Jülich
- Germany
| | - Emmanuel Kentzinger
- Jülich Centre for Neutron Science JCNS and Peter Grüberg Institut PGI
- JARA-FIT
- Jülich
- Germany
| | - Ulrich Rücker
- Jülich Centre for Neutron Science JCNS and Peter Grüberg Institut PGI
- JARA-FIT
- Jülich
- Germany
| | - Fengshan Zheng
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute
- Forschungszentrum Jülich GmbH
- 52425 Jülich
- Germany
| | - Peng-Han Lu
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute
- Forschungszentrum Jülich GmbH
- 52425 Jülich
- Germany
| | - Xian-Kui Wei
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute
- Forschungszentrum Jülich GmbH
- 52425 Jülich
- Germany
| | - Rafal E. Dunin-Borkowski
- Ernst Ruska-Centre for Microscopy and Spectroscopy with Electrons and Peter Grünberg Institute
- Forschungszentrum Jülich GmbH
- 52425 Jülich
- Germany
| | - Thomas Brückel
- Jülich Centre for Neutron Science JCNS and Peter Grüberg Institut PGI
- JARA-FIT
- Jülich
- Germany
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6
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Kulkarni SA, Kolhatkar AG, Lee TR, Garno JC. Vibrational response of clusters of Fe 3O 4 nanoparticles patterned on glass surfaces investigated with magnetic sample modulation AFM. NANOSCALE 2018; 10:20426-20434. [PMID: 30378633 DOI: 10.1039/c8nr06174b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The vibration of Fe3O4 nanoparticles in response to an alternating magnetic field can be sensitively detected using contact mode atomic force microscopy (AFM) combined with selective modulation of magnetic domains. While imaging patterned samples of magnetic nanoparticles with contact mode AFM, a magnetic field was applied to drive sample vibration. The field altered in polarity and strength according to parameters of an AC current applied to a solenoid located under the sample. The vibration of Fe3O4 nanoparticles was detected by a nonmagnetic AFM tip to map the changes in frequency and amplitude of the vibrating sample at the level of individual Fe3O4 nanoparticles and clusters. Colloidal lithography, was used to prepare patterns of Fe3O4 nanoparticles on a glass surface using the basic steps of mixing, drying and removing the surface template of latex spheres. Monodisperse latex spheres were used to guide the deposition of magnetic nanoparticles in the spaces between the close-packed spheres of the latex film. With a mixture approach of "two-particle" lithography, 2D arrays of patterned aggregates of metal nanoparticles were generated which formed a periodic, well-defined arrangement that was suitable for subsequent characterizations with magnetic sample modulation (MSM).
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Affiliation(s)
- Shalaka A Kulkarni
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA, 70803 USA.
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7
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Wen T, Li Y, Zhang D, Zhan Q, Wen Q, Liao Y, Xie Y, Zhang H, Liu C, Jin L, Liu Y, Zhou T, Zhong Z. Manipulate the magnetic anisotropy of nanoparticle assemblies in arrays. J Colloid Interface Sci 2017; 497:14-22. [DOI: 10.1016/j.jcis.2017.02.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Revised: 01/18/2017] [Accepted: 02/23/2017] [Indexed: 10/20/2022]
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8
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Kim J, Song X, Ji F, Luo B, Ice NF, Liu Q, Zhang Q, Chen Q. Polymorphic Assembly from Beveled Gold Triangular Nanoprisms. NANO LETTERS 2017; 17:3270-3275. [PMID: 28445071 DOI: 10.1021/acs.nanolett.7b00958] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The shape anisotropy of nanoparticle building blocks is of critical importance in determining their packing symmetry and assembly directionality. While there has been extensive research on the effect of their overall geometric shapes, the importance of nanometer morphology details is not well-recognized or understood. Here we draw on shape-anisotropic gold triangular nanoprism building blocks synthesized based on a method we recently developed; besides the "large-scale" triangular prism shape (79.8 nm in side length and 22.0 nm in thickness), the prisms are beveled with their sides convexly enclosed by two flat {100} facets. We engineer the balance between electrostatic repulsion and entropically driven depletion attraction in the system to generate self-assemblies without or with the effect of the nanoscale beveling detail. A conventional, planar honeycomb (p-honeycomb) lattice forms with the triangular basal planes packed on the same plane at low depletion attraction, whereas an unexpected interlocking honeycomb (i-honeycomb) lattice and its "supracrystal" forms are assembled with additional close-paralleling of side facets at high depletion attraction. The i-honeycomb lattice renders all the metallic surfaces in close proximity and leads to a surface-enhanced Raman scattering signal nearly 5-fold higher than that in the p-honeycomb lattice and high sensitivity for detecting the model molecule Rhodamine 6G at a concentration as low as 10-8 M. Our study can guide future work in both nanoparticle synthesis and self-assembly; nanoscale geometrical features in anisotropic nanoparticles can be used as an important handle to control directional interactions for nonconventional ordered assemblies and to enrich diversity in self-assembly structure and function.
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Affiliation(s)
| | | | - Fei Ji
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center for Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, People's Republic of China
| | | | - Nicole F Ice
- Wheeler High School , Marietta, Georgia 30068, United States
| | - Qipeng Liu
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center for Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, People's Republic of China
| | - Qiao Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center for Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou, Jiangsu 215123, People's Republic of China
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9
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Jiang C, Leung CW, Pong PWT. Magnetic-Field-Assisted Assembly of Anisotropic Superstructures by Iron Oxide Nanoparticles and Their Enhanced Magnetism. NANOSCALE RESEARCH LETTERS 2016; 11:189. [PMID: 27067737 PMCID: PMC4828407 DOI: 10.1186/s11671-016-1406-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2016] [Accepted: 04/04/2016] [Indexed: 05/19/2023]
Abstract
Magnetic nanoparticle superstructures with controlled magnetic alignment and desired structural anisotropy hold promise for applications in data storage and energy storage. Assembly of monodisperse magnetic nanoparticles under a magnetic field could lead to highly ordered superstructures, providing distinctive magnetic properties. In this work, a low-cost fabrication technique was demonstrated to assemble sub-20-nm iron oxide nanoparticles into crystalline superstructures under an in-plane magnetic field. The gradient of the applied magnetic field contributes to the anisotropic formation of micron-sized superstructures. The magnitude of the applied magnetic field promotes the alignment of magnetic moments of the nanoparticles. The strong dipole-dipole interactions between the neighboring nanoparticles lead to a close-packed pattern as an energetically favorable configuration. Rod-shaped and spindle-shaped superstructures with uniform size and controlled spacing were obtained using spherical and polyhedral nanoparticles, respectively. The arrangement and alignment of the superstructures can be tuned by changing the experimental conditions. The two types of superstructures both show enhancement of coercivity and saturation magnetization along the applied field direction, which is presumably associated with the magnetic anisotropy and magnetic dipole interactions of the constituent nanoparticles and the increased shape anisotropy of the superstructures. Our results show that the magnetic-field-assisted assembly technique could be used for fabricating nanomaterial-based structures with controlled geometric dimensions and enhanced magnetic properties for magnetic and energy storage applications.
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Affiliation(s)
- Chengpeng Jiang
- />Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, Hong Kong
| | - Chi Wah Leung
- />Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon, Hong Kong
| | - Philip W. T. Pong
- />Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, Hong Kong
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10
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Toulemon D, Liu Y, Cattoën X, Leuvrey C, Bégin-Colin S, Pichon BP. Enhanced Collective Magnetic Properties in 2D Monolayers of Iron Oxide Nanoparticles Favored by Local Order and Local 1D Shape Anisotropy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1621-1628. [PMID: 26807596 DOI: 10.1021/acs.langmuir.5b04145] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Magnetic nanoparticle arrays represent a very attractive research field because their collective properties can be efficiently modulated as a function of the structure of the assembly. Nevertheless, understanding the way dipolar interactions influence the intrinsic magnetic properties of nanoparticles still remains a great challenge. In this study, we report on the preparation of 2D assemblies of iron oxide nanoparticles as monolayers deposited onto substrates. Assemblies have been prepared by using the Langmuir-Blodgett technique and the SAM assisted assembling technique combined to CuAAC "click" reaction. These techniques afford to control the formation of well-defined monolayers of nanoparticles on large areas. The LB technique controls local ordering of nanoparticles, while adjusting the kinetics of CuAAC "click" reaction strongly affects the spatial arrangement of nanoparticles in monolayers. Fast kinetics favor disordered assemblies while slow kinetics favor the formation of chain-like structures. Such anisotropic assemblies are induced by dipolar interactions between nanoparticles as no magnetic field is applied and no solvent evaporation is performed. The collective magnetic properties of monolayers are studied as a function of average interparticle distance, local order and local shape anisotropy. We demonstrate that local control on spatial arrangement of nanoparticles in monolayers significantly strengthens dipolar interactions which enhances collective properties and results in possible super ferromagnetic order.
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Affiliation(s)
- Delphine Toulemon
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS, UMR 7504 UdS/ECPM CNRS) , 23 rue du Loess, BP 43, 67037, Strasbourg, France
| | - Yu Liu
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS, UMR 7504 UdS/ECPM CNRS) , 23 rue du Loess, BP 43, 67037, Strasbourg, France
| | - Xavier Cattoën
- Institut Néel, CNRS and Univ. Grenoble-Alpes, UPR 2940 , 25 rue des Martyrs, 38042 Grenoble, France
| | - Cédric Leuvrey
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS, UMR 7504 UdS/ECPM CNRS) , 23 rue du Loess, BP 43, 67037, Strasbourg, France
| | - Sylvie Bégin-Colin
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS, UMR 7504 UdS/ECPM CNRS) , 23 rue du Loess, BP 43, 67037, Strasbourg, France
| | - Benoit P Pichon
- Institut de Physique et Chimie des Matériaux de Strasbourg (IPCMS, UMR 7504 UdS/ECPM CNRS) , 23 rue du Loess, BP 43, 67037, Strasbourg, France
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11
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He Q, Yuan T, Wang Y, Guleria A, Wei S, Zhang G, Sun L, Liu J, Yu J, Young DP, Lin H, Khasanov A, Guo Z. Manipulating the dimensional assembly pattern and crystalline structures of iron oxide nanostructures with a functional polyolefin. NANOSCALE 2016; 8:1915-1920. [PMID: 26754459 DOI: 10.1039/c5nr07213a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Controlled crystalline structures (α- and γ-phase) and assembly patterns (1-D, 2-D and 3-D) were achieved in the synthesized iron oxide (Fe2O3) nanoparticles (NPs) using polymeric surfactant-polypropylene grafted maleic anhydride (PP-g-MA) with different concentrations. In addition, the change of the crystalline structure from the α- and γ-phase also led to the significantly increased saturation magnetization and coercivity.
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Affiliation(s)
- Qingliang He
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Tingting Yuan
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Yiran Wang
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
| | - Abhishant Guleria
- Department of Chemistry and Biochemistry, Lamar University, Beaumont, Texas 77710, USA.
| | - Suying Wei
- Department of Chemistry and Biochemistry, Lamar University, Beaumont, Texas 77710, USA.
| | - Guoqi Zhang
- Department of Sciences, John Jay College and the Graduate Center, The City University of New York, New York, 10019, USA.
| | - Luyi Sun
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - Jingjing Liu
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - Jingfang Yu
- Department of Chemical & Biomolecular Engineering, Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT 06269-3136, USA
| | - David P Young
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - Hongfei Lin
- Department of Chemical and Materials Engineering, University of Nevada, Reno, Nevada 89557, USA
| | - Airat Khasanov
- Department of Chemistry, University of North Carolina at Asheville, Asheville, North Carolina 28804, USA
| | - Zhanhu Guo
- Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA.
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12
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Bao Y, Wen T, Samia ACS, Khandhar A, Krishnan KM. Magnetic Nanoparticles: Material Engineering and Emerging Applications in Lithography and Biomedicine. JOURNAL OF MATERIALS SCIENCE 2016; 51:513-553. [PMID: 26586919 PMCID: PMC4646229 DOI: 10.1007/s10853-015-9324-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 07/31/2015] [Indexed: 05/05/2023]
Abstract
We present an interdisciplinary overview of material engineering and emerging applications of iron oxide nanoparticles. We discuss material engineering of nanoparticles in the broadest sense, emphasizing size and shape control, large-area self-assembly, composite/hybrid structures, and surface engineering. This is followed by a discussion of several non-traditional, emerging applications of iron oxide nanoparticles, including nanoparticle lithography, magnetic particle imaging, magnetic guided drug delivery, and positive contrast agents for magnetic resonance imaging. We conclude with a succinct discussion of the pharmacokinetics pathways of iron oxide nanoparticles in the human body -- an important and required practical consideration for any in vivo biomedical application, followed by a brief outlook of the field.
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Affiliation(s)
- Yuping Bao
- Chemical and Biological Engineering, The University of Alabama, Tuscaloosa, AL 35487
| | - Tianlong Wen
- State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China
| | | | | | - Kannan M. Krishnan
- Materials Science and Engineering, University of Washington, Seattle, 98195
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13
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Onses MS, Wan L, Liu X, Kiremitler NB, Yılmaz H, Nealey PF. Self-Assembled Nanoparticle Arrays on Chemical Nanopatterns Prepared Using Block Copolymer Lithography. ACS Macro Lett 2015; 4:1356-1361. [PMID: 35614782 DOI: 10.1021/acsmacrolett.5b00644] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We present a high-throughput and inexpensive fabrication approach that uses self-assembled block copolymer (BCP) films as templates to generate dense nanoscale chemical patterns of polymer brushes for the selective immobilization of Au nanoparticles (NPs). A cross-linked random copolymer mat that contains styrene and methyl methacrylate units serves both as a base layer for perpendicular assembly of nanoscale domains of poly(styrene-block-methyl methacrylate) (PS-b-PMMA) films and as a nonadsorbing background layer that surrounds the chemical patterns. The selective removal of the PMMA block and the underlying mat via oxygen plasma etching generates binding sites which are then functionalized with poly(2-vinylpyridine) (P2VP) brushes. Au NPs with a diameter of 13 nm selectively immobilize on the patterned P2VP brushes. An essential aspect in fabricating high quality chemical patterns is the superior behavior of methyl methacrylate containing cross-linked mats in retaining their chemistry during the grafting of P2VP brushes. The use of BCPs with different molecular weights and volume fractions allows for preparation of chemical patterns with different geometries, sizes, and pitches for generating arrays of single particles that hold great promise for applications that range from molecular sensing to optical devices.
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Affiliation(s)
- M. Serdar Onses
- Department
of Materials Science and Engineering, Nanotechnology Research Center (ERNAM) Erciyes University, Kayseri, 38039, Turkey
| | - Lei Wan
- HGST, a Western
Digital Company, San Jose Research
Center 3403 Yerba Buena Road, San Jose, California 95135, United States
| | - Xiaoying Liu
- Institute
for Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, United States
| | - N. Burak Kiremitler
- Department
of Materials Science and Engineering, Nanotechnology Research Center (ERNAM) Erciyes University, Kayseri, 38039, Turkey
| | - Hatice Yılmaz
- Department
of Materials Science and Engineering, Nanotechnology Research Center (ERNAM) Erciyes University, Kayseri, 38039, Turkey
| | - Paul F. Nealey
- Institute
for Molecular Engineering, The University of Chicago, Chicago, Illinois 60637, United States
- Argonne National
Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
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