1
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Dong D, Fu R, Shi Q, Cheng W. Self-assembly and characterization of 2D plasmene nanosheets. Nat Protoc 2019; 14:2691-2706. [PMID: 31420600 DOI: 10.1038/s41596-019-0200-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 05/20/2019] [Indexed: 02/06/2023]
Abstract
Freestanding plasmonic nanoparticle (NP) superlattice sheets are novel 2D nanomaterials with tailorable properties that enable their use for broad applications in sensing, anticounterfeit measures, ionic gating, nanophotonics and flat lenses. We recently developed a robust, yet general, two-step drying-mediated approach to produce freestanding monolayer, plasmonic NP superlattice sheets, which are typically held together by holey grids with minimal solid support. Within these superlattices, NP building blocks are closely packed and have strong plasmonic coupling interactions; hence, we termed such freestanding materials 'plasmene nanosheets'. Using the desired NP building blocks as starting material, we describe the detailed fabrication protocol, including NP surface functionalization by thiolated polystyrene and the self-assembly of NPs at the air-water interface. We also discuss various characterization approaches for checking the quality and optical properties of the as-obtained plasmene nanosheets: optical microscopy, spectrophotometry, transmission/scanning electron microscopy (TEM/SEM) and atomic force microscopy (AFM). With regard to different constituent building blocks, the key experimental parameters, including NP concentration and volume, are summarized to guide the successful fabrication of specific types of plasmene nanosheets. This protocol, from initial NP synthesis to the final fabrication and characterization, takes ~33.5 h.
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Affiliation(s)
- Dashen Dong
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, Victoria, Australia.,The Melbourne Centre for Nanofabrication, Clayton, Victoria, Australia.,Functional Materials and Microsystems Research Group and Micro Nano Research Facility, RMIT University, Melbourne, Victoria, Australia
| | - Runfang Fu
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, Victoria, Australia.,The Melbourne Centre for Nanofabrication, Clayton, Victoria, Australia
| | - Qianqian Shi
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, Victoria, Australia.,The Melbourne Centre for Nanofabrication, Clayton, Victoria, Australia
| | - Wenlong Cheng
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, Victoria, Australia. .,The Melbourne Centre for Nanofabrication, Clayton, Victoria, Australia.
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2
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Gabrys PA, Zornberg LZ, Macfarlane RJ. Programmable Atom Equivalents: Atomic Crystallization as a Framework for Synthesizing Nanoparticle Superlattices. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1805424. [PMID: 30970182 DOI: 10.1002/smll.201805424] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/08/2019] [Indexed: 06/09/2023]
Abstract
Decades of research efforts into atomic crystallization phenomenon have led to a comprehensive understanding of the pathways through which atoms form different crystal structures. With the onset of nanotechnology, methods that use colloidal nanoparticles (NPs) as nanoscale "artificial atoms" to generate hierarchically ordered materials are being developed as an alternative strategy for materials synthesis. However, the assembly mechanisms of NP-based crystals are not always as well-understood as their atomic counterparts. The creation of a tunable nanoscale synthon whose assembly can be explained using the context of extensively examined atomic crystallization will therefore provide significant advancement in nanomaterials synthesis. DNA-grafted NPs have emerged as a strong candidate for such a "programmable atom equivalent" (PAE), because the predictable nature of DNA base-pairing allows for complex yet easily controlled assembly. This Review highlights the characteristics of these PAEs that enable controlled assembly behaviors analogous to atomic phenomena, which allows for rational material design well beyond what can be achieved with other crystallization techniques.
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Affiliation(s)
- Paul A Gabrys
- Department of Materials Science and Engineering, Massachusetts Institute of Technology (MIT), 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Leonardo Z Zornberg
- Department of Materials Science and Engineering, Massachusetts Institute of Technology (MIT), 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Robert J Macfarlane
- Department of Materials Science and Engineering, Massachusetts Institute of Technology (MIT), 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
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3
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Lewis DJ, Gabrys PA, Macfarlane RJ. DNA-Directed Non-Langmuir Deposition of Programmable Atom Equivalents. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:14842-14850. [PMID: 30169041 DOI: 10.1021/acs.langmuir.8b01541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Particle assembly at interfaces via programmed DNA interactions allows for independent modification of both nanoparticle-surface interaction strength and the magnitude of interparticle repulsion. Together, these factors allow for modification of the deposited thin film morphology via alterations in DNA binding sequence. Importantly, both Langmuir and random sequential adsorption models yield insights into the thermodynamics of deposition but cannot fully explain particle coverage as a function of all relevant variables, indicating that the particle deposition mechanism for DNA-grafted colloids is more complex than prior adsorption phenomena. Here, it is shown that these deviations from standard behavior arise from the fact that each nanoparticle is attached to the surface via multiple weak DNA duplex interactions, enabling diffusion of adsorbed colloids across the substrate. Thus, surface migration of individual particles causes reorganization of the deposited monolayer, leading to the unusual behavior of coverage increasing at elevated temperatures that are just below the particle desorption temperature. The programmability of DNA-directed particle deposition therefore allows for precise control over the morphology of monolayer films, as well as the ability to generate crystalline materials with controllable surface roughness and grain size through layer-by-layer growth. The increased control over thin film morphology potentially enables tailoring of mechanical and optical properties and holds promise for use in a variety of applications.
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Affiliation(s)
- Diana J Lewis
- Draper , 555 Technology Square , Cambridge , Massachusetts 02139 , United States
- Department of Aeronautics and Astronautics , Massachusetts Institute of Technology (MIT) , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Paul A Gabrys
- Department of Materials Science and Engineering , Massachusetts Institute of Technology (MIT) , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
| | - Robert J Macfarlane
- Department of Materials Science and Engineering , Massachusetts Institute of Technology (MIT) , 77 Massachusetts Avenue , Cambridge , Massachusetts 02139 , United States
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4
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Cui S, Guan XN, Ghantous E, Vajo JJ, Lucas M, Hsiao MS, Drummy LF, Collins J, Juhl A, Roper CS, Gross AF. Aqueous Assembly of Oxide and Fluoride Nanoparticles into 3D Microassemblies. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:8075-8080. [PMID: 29897774 DOI: 10.1021/acs.langmuir.8b01662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We demonstrate rapid [∼mm3/(h·L)] organic ligand-free self-assembly of three-dimensional, >50 μm single-domain microassemblies containing up to 107 individual aligned nanoparticles through a scalable aqueous process. Organization and alignment of aqueous solution-dispersed nanoparticles are induced by decreasing their pH-dependent surface charge without organic ligands, which could be temperature-sensitive or infrared light absorbing. This process is exhibited by transforming both dispersed iron oxide hydroxide nanorods and lithium yttrium fluoride nanoparticles into high packing density microassemblies. The approach is generalizable to nanomaterials with pH-dependent surface charge (e.g., oxides, fluorides, and sulfides) for applications requiring long-range alignment of nanostructures as well as high packing density.
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Affiliation(s)
- Shanying Cui
- HRL Laboratories, LLC , 3011 Malibu Canyon Road , Malibu , California 90265 , United States
| | - Xin N Guan
- HRL Laboratories, LLC , 3011 Malibu Canyon Road , Malibu , California 90265 , United States
| | - Eliana Ghantous
- HRL Laboratories, LLC , 3011 Malibu Canyon Road , Malibu , California 90265 , United States
| | - John J Vajo
- HRL Laboratories, LLC , 3011 Malibu Canyon Road , Malibu , California 90265 , United States
| | - Matthew Lucas
- Air Force Research Laboratory , 2941 Hobson Way , Wright Patterson Air Force Base , Ohio 45433 , United States
| | - Ming-Siao Hsiao
- Air Force Research Laboratory , 2941 Hobson Way , Wright Patterson Air Force Base , Ohio 45433 , United States
| | - Lawrence F Drummy
- Air Force Research Laboratory , 2941 Hobson Way , Wright Patterson Air Force Base , Ohio 45433 , United States
| | - Joshua Collins
- Intelligent Material Solutions, Inc. , 201 Washington Road , Princeton , New Jersey 08540 , United States
| | - Abigail Juhl
- Air Force Research Laboratory , 2941 Hobson Way , Wright Patterson Air Force Base , Ohio 45433 , United States
| | - Christopher S Roper
- HRL Laboratories, LLC , 3011 Malibu Canyon Road , Malibu , California 90265 , United States
| | - Adam F Gross
- HRL Laboratories, LLC , 3011 Malibu Canyon Road , Malibu , California 90265 , United States
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5
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Shi Q, Sikdar D, Fu R, Si KJ, Dong D, Liu Y, Premaratne M, Cheng W. 2D Binary Plasmonic Nanoassemblies with Semiconductor n/p-Doping-Like Properties. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1801118. [PMID: 29761572 DOI: 10.1002/adma.201801118] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Revised: 03/16/2018] [Indexed: 06/08/2023]
Abstract
The electronic, optical, thermal, and magnetic properties of an extrinsic bulk semiconductor can be finely tuned by adjusting its dopant concentration. Here, it is demonstrated that such a doping concept can be extended to plasmonic nanomaterials. Using two-dimensional (2D) assemblies of Au@Ag and Au nanocubes (NCs) as a model system, detailed experimental and theoretical studies are carried out, which reveal collective semiconductor n/p-doping-like plasmonic properties. A threshold doping concentration of Au@Ag NCs is observed, below which p-doping dominates and above which n-doping prevails. Furthermore, Au@Ag NC dopants can be converted into corresponding Au seed "voids" dopants by selectively removing Ag without changing the overall structural integrity. The results show that the plasmonic doping concept may serve as a general design principle guiding synthesis and assembly of plasmonic metamaterials for programmable optoelectronic devices.
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Affiliation(s)
- Qianqian Shi
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, 3800, Victoria, Australia
- The Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, 3168, Victoria, Australia
| | - Debabrata Sikdar
- Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Faculty of Engineering, Monash University, Clayton, 3800, Victoria, Australia
- Faculty of Natural Sciences, Department of Chemistry, Imperial College London, South Kensington, London, SW72AZ, UK
- Department of Electronics and Electrical Engineering, Indian Institute of Technology Guwahati, Guwahati, 781039, India
| | - Runfang Fu
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, 3800, Victoria, Australia
- The Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, 3168, Victoria, Australia
| | - Kae Jye Si
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, 3800, Victoria, Australia
- The Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, 3168, Victoria, Australia
| | - Dashen Dong
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, 3800, Victoria, Australia
- The Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, 3168, Victoria, Australia
| | - Yiyi Liu
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, 3800, Victoria, Australia
- The Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, 3168, Victoria, Australia
| | - Malin Premaratne
- Advanced Computing and Simulation Laboratory (AχL), Department of Electrical and Computer Systems Engineering, Faculty of Engineering, Monash University, Clayton, 3800, Victoria, Australia
| | - Wenlong Cheng
- Department of Chemical Engineering, Faculty of Engineering, Monash University, Clayton, 3800, Victoria, Australia
- The Melbourne Centre for Nanofabrication, 151 Wellington Road, Clayton, 3168, Victoria, Australia
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6
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Lin QY, Palacios E, Zhou W, Li Z, Mason JA, Liu Z, Lin H, Chen PC, Dravid VP, Aydin K, Mirkin CA. DNA-Mediated Size-Selective Nanoparticle Assembly for Multiplexed Surface Encoding. NANO LETTERS 2018; 18:2645-2649. [PMID: 29570302 DOI: 10.1021/acs.nanolett.8b00509] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Multiplexed surface encoding is achieved by positioning two different sizes of gold nanocubes on gold surfaces with precisely defined locations for each particle via template-confined, DNA-mediated nanoparticle assembly. As a proof-of-concept demonstration, cubes with 86 and 63 nm edge lengths are assembled into arrangements that physically and spectrally encrypt two sets of patterns in the same location. These patterns can be decrypted by mapping the absorption intensity of the substrate at λ = 773 and 687 nm, respectively. This multiplexed encoding platform dramatically increases the sophistication and density of codes that can be written using colloidal nanoparticles, which may enable high-security, high-resolution encoding applications.
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7
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Oh T, Ku JC, Ozel T, Mirkin CA. Orthogonal Chemical Modification of Template-Synthesized Nanostructures with DNA. J Am Chem Soc 2017; 139:6831-6834. [DOI: 10.1021/jacs.7b03111] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Taegon Oh
- Department
of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of
Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Jessie C. Ku
- Department
of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of
Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Tuncay Ozel
- Department
of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of
Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Chad A. Mirkin
- Department
of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of
Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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8
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Sun L, Lin H, Park DJ, Bourgeois MR, Ross MB, Ku JC, Schatz GC, Mirkin CA. Polarization-Dependent Optical Response in Anisotropic Nanoparticle-DNA Superlattices. NANO LETTERS 2017; 17:2313-2318. [PMID: 28358518 DOI: 10.1021/acs.nanolett.6b05101] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
DNA-programmable assembly has been used to prepare superlattices composed of octahedral and spherical nanoparticles, respectively. These superlattices have the same body-centered cubic lattice symmetry and macroscopic rhombic dodecahedron crystal habit but tunable lattice parameters by virtue of the DNA length, allowing one to study and determine the effect of nanoscale structure and lattice parameter on the light-matter interactions in the superlattices. Backscattering measurements and finite-difference time-domain simulations have been used to characterize these two classes of superlattices. Superlattices composed of octahedral nanoparticles exhibit polarization-dependent backscattering but via a trend that is opposite to that observed in the polarization dependence for analogous superlattices composed of spherical nanoparticles. Electrodynamics simulations show that this polarization dependence is mainly due to the anisotropy of the nanoparticles and is observed only if the octahedral nanoparticles are well-aligned within the superlattices. Both plasmonic and photonic modes are identified in such structures, both of which can be tuned by controlling the size and shape of the nanoparticle building blocks, the lattice parameters, and the overall size of the three-dimensional superlattices (without changing habit).
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Affiliation(s)
- Lin Sun
- Department of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of Chemistry, Northwestern University , Evanston, Illinois 60208 United States
| | - Haixin Lin
- Department of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of Chemistry, Northwestern University , Evanston, Illinois 60208 United States
| | - Daniel J Park
- Department of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of Chemistry, Northwestern University , Evanston, Illinois 60208 United States
| | - Marc R Bourgeois
- Department of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of Chemistry, Northwestern University , Evanston, Illinois 60208 United States
| | - Michael B Ross
- Department of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of Chemistry, Northwestern University , Evanston, Illinois 60208 United States
| | - Jessie C Ku
- Department of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of Chemistry, Northwestern University , Evanston, Illinois 60208 United States
| | - George C Schatz
- Department of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of Chemistry, Northwestern University , Evanston, Illinois 60208 United States
| | - Chad A Mirkin
- Department of Materials Science and Engineering, ‡International Institute for Nanotechnology, and §Department of Chemistry, Northwestern University , Evanston, Illinois 60208 United States
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9
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Kim KH, Jeong JM, Lee SJ, Choi BG, Lee KG. Protein-directed assembly of cobalt phosphate hybrid nanoflowers. J Colloid Interface Sci 2016; 484:44-50. [PMID: 27585999 DOI: 10.1016/j.jcis.2016.08.059] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Accepted: 08/16/2016] [Indexed: 01/13/2023]
Abstract
The understanding and controlling of biomimetic hybrid materials are a key objective in bio-nanotechnology, materials chemistry, and colloid science fields. Biomaterials, such as, enzyme, DNA, RNA, and proteins have become important templates for the construction of inorganic-organic hybrid nanoflowers. From this perspective, we present a simple approach to synthesize protein and metal hybrid flower-like structure using bovine serum albumin (BSA) and cobalt phosphate, and the results of our study on the formation mechanism involved. The time dependent growing stage and formation mechanism were analyzed by electron microscopes and spectroscopic techniques. The protein-directed assembly method for preparation of hybrid nanoflowers described in this work could be used to fabricate other bio-metal hybrid materials with possible applications in biosensors, bioanalytical devices, and industrial biocatalyst fields.
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Affiliation(s)
- Kyung Hoon Kim
- Nano-bio Application Team, National Nanofab Center, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jae-Min Jeong
- Nano-bio Application Team, National Nanofab Center, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Seok Jae Lee
- Nano-bio Application Team, National Nanofab Center, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Bong Gill Choi
- Department of Chemical Engineering, Kangwon National University, Samcheok 25913, Republic of Korea.
| | - Kyoung G Lee
- Nano-bio Application Team, National Nanofab Center, 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea.
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10
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Myers BD, Lin QY, Wu H, Luijten E, Mirkin CA, Dravid VP. Size-Selective Nanoparticle Assembly on Substrates by DNA Density Patterning. ACS NANO 2016; 10:5679-5686. [PMID: 27192324 DOI: 10.1021/acsnano.6b02246] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The vision of nanoscale self-assembly research is the programmable synthesis of macroscale structures with controlled long and short-range order that exhibit a desired set of properties and functionality. However, strategies to reliably isolate and manipulate the nanoscale building blocks based on their size, shape, or chemistry are still in their infancy. Among the promising candidates, DNA-mediated self-assembly has enabled the programmable assembly of nanoparticles into complex architectures. In particular, two-dimensional assembly on substrates has potential for the development of integrated functional devices and analytical systems. Here, we combine the high-resolution patterning capabilities afforded by electron-beam lithography with the DNA-mediated assembly process to enable direct-write grayscale DNA density patterning. This method allows modulation of the functionally active DNA surface density to control the thermodynamics of interactions between nanoparticles and the substrate. We demonstrate that size-selective directed assembly of nanoparticle films from solutions containing a bimodal distribution of particles can be realized by exploiting the cooperativity of DNA binding in this system. To support this result, we study the temperature-dependence of nanoparticle assembly, analyze the DNA damage by X-ray photoelectron spectroscopy and fluorescence microscopy, and employ molecular dynamics simulations to explore the size-selection behavior.
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Affiliation(s)
- Benjamin D Myers
- Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States
- NUANCE Center, Northwestern University , Evanston, Illinois 60208, United States
| | - Qing-Yuan Lin
- Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States
| | - Huanxin Wu
- Department of Physics and Astronomy, Northwestern University , Evanston, Illinois 60208, United States
| | - Erik Luijten
- Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States
- Department of Physics and Astronomy, Northwestern University , Evanston, Illinois 60208, United States
- Department of Engineering Sciences and Applied Mathematics, Northwestern University , Evanston, Illinois 60208, United States
| | - Chad A Mirkin
- Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University , Evanston, Illinois 60208, United States
- Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States
| | - Vinayak P Dravid
- Department of Materials Science and Engineering, Northwestern University , Evanston, Illinois 60208, United States
- NUANCE Center, Northwestern University , Evanston, Illinois 60208, United States
- International Institute for Nanotechnology, Northwestern University , Evanston, Illinois 60208, United States
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11
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Shi Q, Si KJ, Sikdar D, Yap LW, Premaratne M, Cheng W. Two-Dimensional Bipyramid Plasmonic Nanoparticle Liquid Crystalline Superstructure with Four Distinct Orientational Packing Orders. ACS NANO 2016; 10:967-976. [PMID: 26731313 DOI: 10.1021/acsnano.5b06206] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Anisotropic plasmonic nanoparticles have been successfully used as constituent elements for growing ordered nanoparticle arrays. However, orientational control over their spatial ordering remains challenging. Here, we report on a self-assembled two-dimensional (2D) nanoparticle liquid crystalline superstructure (NLCS) from bipyramid gold nanoparticles (BNPs), which showed four distinct orientational packing orders, corresponding to horizontal alignment (H-NLCS), circular arrangement (C-NLCS), slanted alignment (S-NLCS), and vertical alignment (V-NLCS) of constituent particle building elements. These packing orders are characteristic of the unique shape of BNPs because all four packing modes were observed for particles with various sizes. Nevertheless, only H-NLCS and V-NLCS packing orders were observed for the free-standing ordered array nanosheets formed from a drying-mediated self-assembly at the air/water interface of a sessile droplet. This is due to strong surface tension and the absence of particle-substrate interaction. In addition, we found the collective plasmonic coupling properties mainly depend on the packing type, and characteristic coupling peak locations depend on particle sizes. Interestingly, surface-enhanced Raman scattering (SERS) enhancements were heavily dependent on the orientational packing ordering. In particular, V-NLCS showed the highest Raman enhancement factor, which was about 77-fold greater than the H-NLCS and about 19-fold greater than C-NLCS. The results presented here reveal the nature and significance of orientational ordering in controlling plasmonic coupling and SERS enhancements of ordered plasmonic nanoparticle arrays.
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Affiliation(s)
- Qianqian Shi
- The Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton 3168, Victoria, Australia
| | - Kae Jye Si
- The Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton 3168, Victoria, Australia
| | | | - Lim Wei Yap
- The Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton 3168, Victoria, Australia
| | | | - Wenlong Cheng
- The Melbourne Centre for Nanofabrication , 151 Wellington Road, Clayton 3168, Victoria, Australia
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12
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Luo D, Yan C, Wang T. Interparticle Forces Underlying Nanoparticle Self-Assemblies. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:5984-6008. [PMID: 26436692 DOI: 10.1002/smll.201501783] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2015] [Revised: 08/03/2015] [Indexed: 05/27/2023]
Abstract
Studies on the self-assembly of nanoparticles have been a hot topic in nanotechnology for decades and still remain relevant for the present and future due to their tunable collective properties as well as their remarkable applications to a wide range of fields. The novel properties of nanoparticle assemblies arise from their internal interactions and assemblies with the desired architecture key to constructing novel nanodevices. Therefore, a comprehensive understanding of the interparticle forces of nanoparticle self-assemblies is a pre-requisite to the design and control of the assembly processes, so as to fabricate the ideal nanomaterial and nanoproducts. Here, different categories of interparticle forces are classified and discussed according to their origins, behaviors and functions during the assembly processes, and the induced collective properties of the corresponding nanoparticle assemblies. Common interparticle forces, such as van der Waals forces, electrostatic interactions, electromagnetic dipole-dipole interactions, hydrogen bonds, solvophonic interactions, and depletion interactions are discussed in detail. In addition, new categories of assembly principles are summarized and introduced. These are termed template-mediated interactions and shape-complementary interactions. A deep understanding of the interactions inside self-assembled nanoparticles, and a broader perspective for the future synthesis and fabrication of these promising nanomaterials is provided.
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Affiliation(s)
- Dan Luo
- Institute of New Energy, State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), Beijing, 102249, China
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China
| | - Cong Yan
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China
| | - Tie Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China
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