1
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Luo Z, Mehraeen S. Molecular View of the Distortion and Pinning Force of a Receding Contact Line: Impact of the Nanocavity Geometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:7008-7018. [PMID: 34096301 DOI: 10.1021/acs.langmuir.1c00599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
We present a molecular view using many-body dissipative particle dynamics simulations to unravel the pinning phenomenon of a liquid film receding over a solid substrate with a nanocavity. We find that the pinning force and distortion of the pinned contact line vary across different nanocavity shapes. We show that the mechanism of a caterpillar motion, which has previously been proposed for advancing precursor films, persists in a partially pinned receding contact line. Our results also demonstrate a localized clamping effect, which is originated from the variation of the dynamic contact angle along the pinned contact line. The simulation results suggest that the clamping effect can be controlled by the geometry of the nanocavity and hydrophilicity of the underlying substrate.
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Affiliation(s)
- Zhen Luo
- Department of Chemical Engineering, University of Illinois at Chicago, 929 West Taylor Street, Chicago, Illinois 60607, United States
| | - Shafigh Mehraeen
- Department of Chemical Engineering, University of Illinois at Chicago, 929 West Taylor Street, Chicago, Illinois 60607, United States
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2
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Du L, Sun N, Chen Z, Li Y, Liu X, Zhong X, Wu X, Xie Y, Liu Q. Depletion-Mediated Uniform Deposition of Nanorods with Patterned, Multiplexed Assembly. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49200-49209. [PMID: 33048523 DOI: 10.1021/acsami.0c13409] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Device-scale, uniform, and controllable deposition of nanoparticles on various substrates is fundamentally important not only for the fabrication of thin-film devices but also for the large sample statistics of single-particle performances. However, it is challenging to obtain such predefined depositions using a simple and efficient method. Here, we present a novel strategy for obtaining the uniform and particle density/spacing-tunable deposition of nanorods on a linker-free substrate. The deposition is driven by the tailored particle-substrate depletion attraction owing to the size-matched design of the substrate roughness and the nanorod diameter. Both gold nanorods and upconversion nanorods were applied to demonstrate the generality of the method. The high particle density of more than 21 per μm2 and correspondingly the small particle spacing of fewer than 0.3 μm were achieved on a scalable substrate template. On this basis, orientational ordering and pattern-selective deposition of nanorods were realized by controlling the liquid flow rate and employing the substrate with patterned roughness areas, respectively. With the roughness-directed density-tunable depositions of nanorods integrated onto a single platform, multiplexed gold nanorod assembly and programmable surface-enhanced Raman mapping were achieved, with a promising prospect in information encoding by using the Raman signals as the translation units. The thermal stability and related transition temperature of about 160 °C of gold nanorods were also revealed as an application of single-particle statistics. This practical method could be extended to wide ranges of potential applications in plasmonic coupling devices, cryptography, or single-particle performance statistics with the feature of the high-throughput, low-cost, and scalable fabrication.
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Affiliation(s)
- Lena Du
- Key Laboratory of Micro-Nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 102206, China
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Ningfei Sun
- Key Laboratory of Micro-Nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 102206, China
| | - Ziyu Chen
- Key Laboratory of Micro-Nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 102206, China
| | - Yuanyuan Li
- Key Laboratory of Micro-Nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 102206, China
| | - Xiaoduo Liu
- Key Laboratory of Micro-Nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 102206, China
| | - Xiaolan Zhong
- Key Laboratory of Micro-Nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 102206, China
| | - Xiaochun Wu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
| | - Yong Xie
- Key Laboratory of Micro-Nano Measurement, Manipulation and Physics (Ministry of Education), School of Physics, Beihang University, Beijing 102206, China
- Key Laboratory of Intelligent Systems and Equipment Electromagnetic Environment Effect (Ministry of Industry and Information Technology), School of Electronics and Information Engineering, Beihang University, Beijing 100191, China
| | - Qian Liu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing 100190, China
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3
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Luo Z, Mehraeen S. Unraveling the Mechanism of a Rising Three-Phase Contact Line along a Vertical Surface Using Many-Body Dissipative Particle Dynamics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:7474-7482. [PMID: 32486644 DOI: 10.1021/acs.langmuir.0c01081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We present coarse-grained molecular (many-body dissipative particle) dynamics simulations to unravel the wetting mechanism of spontaneous rise of a liquid thin film along vertical flat and rough surfaces. We show that the displacement of the rising contact line, in single- and double-wall geometry, exhibits a ballistic motion (∼t) followed by a diffusive dynamics (∼[Formula: see text]) during the rise of the liquid thin film against gravity. Dynamic contact angle decreases as the contact line transitions from ballistic to diffusive regime. Explicit analysis of the velocity and vorticity profile in the bulk and in the proximity of the contact line suggests an unsteady flow field behind the rising three-phase contact line. Furthermore, our simulation results indicate that contact line dynamics and the flow field behind the contact line are independent of the surface roughness.
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Affiliation(s)
- Zhen Luo
- Department of Chemical Engineering, University of Illinois at Chicago, 929 West Taylor Street, Chicago, Illinois 60607, United States
| | - Shafigh Mehraeen
- Department of Chemical Engineering, University of Illinois at Chicago, 929 West Taylor Street, Chicago, Illinois 60607, United States
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4
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Wang K, Jin SM, Li F, Tian D, Xu J, Lee E, Zhu J. Soft Confined Assembly of Polymer-Tethered Inorganic Nanoparticles in Cylindrical Micelles. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00983] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Ke Wang
- State Key Lab of Materials Processing and Die & Mold Technology and Key Lab of Materials Chemistry for Energy Conversion & Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan430074, China
| | - Seon-Mi Jin
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon305764, Republic of Korea
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju61005, Republic of Korea
| | - Fan Li
- State Key Lab of Materials Processing and Die & Mold Technology and Key Lab of Materials Chemistry for Energy Conversion & Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan430074, China
| | - Di Tian
- State Key Lab of Materials Processing and Die & Mold Technology and Key Lab of Materials Chemistry for Energy Conversion & Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan430074, China
| | - Jiangping Xu
- State Key Lab of Materials Processing and Die & Mold Technology and Key Lab of Materials Chemistry for Energy Conversion & Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan430074, China
| | - Eunji Lee
- Graduate School of Analytical Science and Technology, Chungnam National University, Daejeon305764, Republic of Korea
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju61005, Republic of Korea
| | - Jintao Zhu
- State Key Lab of Materials Processing and Die & Mold Technology and Key Lab of Materials Chemistry for Energy Conversion & Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology (HUST), Wuhan430074, China
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5
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Asbahi M, Mahfoud Z, Dolmanan SB, Wu W, Dong Z, Wang F, Saifullah MSM, Tripathy S, Chong KSL, Bosman M. Ultrasmall Designed Plasmon Resonators by Fused Colloidal Nanopatterning. ACS APPLIED MATERIALS & INTERFACES 2019; 11:45207-45213. [PMID: 31694369 DOI: 10.1021/acsami.9b15780] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This work presents a procedure for large-area patterning of designed plasmon resonators that are much smaller than possible with conventional lithography techniques. Fused Colloidal Nanopatterning combines directed self-assembly and controlled fusing of spherical colloidal nanoparticles. The two-step approach first patterns a surface covered with hydrogen silsesquioxane, an electron beam resist, forming traps into which the colloidal gold nanoparticles self-assemble. Second, the patterned nanoparticles are controllably fused to form plasmon resonators of any 2D designed shape. The heights and widths of the plasmon resonators are determined by the diameter of the nanoparticle building blocks, which can be well below 10 nm. By performing the fusing step with UV ozone and heat exposure, we demonstrate that the process is easily scalable to cover large areas on silicon wafers with designed gold nanostructures. The procedure neither requires adhesion layers nor a lift-off process, making it ideally suited for plasmonics, in comparison with regular electron beam lithography. We use monochromated electron energy loss spectroscopy (EELS) in scanning transmission electron microscopy and boundary element method simulations to demonstrate that the designed plasmon resonators are directly tunable via the pattern design. We foresee future expansion of this approach for applications such as plasmon-enhanced photocatalysis and for large-scale patterning where chemical, optical, or confinement properties require sub-10 nm metal lines.
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Affiliation(s)
- Mohamed Asbahi
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - Zackaria Mahfoud
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - Surani B Dolmanan
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - Wenya Wu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - Zhaogang Dong
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - FuKe Wang
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - Mohammad S M Saifullah
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - Sudhiranjan Tripathy
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - Karen S L Chong
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
| | - Michel Bosman
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology, and Research) , 2 Fusionopolis Way , 138634 , Singapore
- Department of Materials Science and Engineering , National University of Singapore , 9 Engineering Drive 1 , 117575 Singapore
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6
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Luo Z, Mehraeen S. Predictive Model to Probe the Impact of Gravity and Surface Tension on Rising Wetting Thin Films. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4189-4196. [PMID: 30794419 DOI: 10.1021/acs.langmuir.8b03971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Utilizing kinetic Monte Carlo simulations, we developed a three-dimensional Ising lattice gas model to reveal the wetting mechanism of a liquid film rising along a vertical substrate. The model takes into account the impact of surface tension, gravity, and interaction energy between liquid particles and between liquid and substrate on the rise of the liquid film. We verify that in low gravitational acceleration regime, the growth of the liquid film follows the universal law of [Formula: see text]. As gravitational acceleration and surface tension vary, the simulation results show the detailed dynamics of the solid-liquid interface. Explicit analysis of the interface displacement and roughness under different gravitational accelerations and surface tensions is also presented.
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Affiliation(s)
- Zhen Luo
- Department of Chemical Engineering , University of Illinois at Chicago , 810 South Clinton Street , Chicago , Illinois 60607 , United States
| | - Shafigh Mehraeen
- Department of Chemical Engineering , University of Illinois at Chicago , 810 South Clinton Street , Chicago , Illinois 60607 , United States
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7
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Guo D, Zheng X, Wang X, Li H, Li K, Li Z, Song Y. Formation of Multicomponent Size‐Sorted Assembly Patterns by Tunable Templated Dewetting. Angew Chem Int Ed Engl 2018; 57:16126-16130. [DOI: 10.1002/anie.201810728] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 10/11/2018] [Indexed: 12/28/2022]
Affiliation(s)
- Dan Guo
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Xu Zheng
- State Key Laboratory of Nonlinear Mechanics, Institute of MechanicsChinese Academy of Sciences Beijing 100190 P. R. China
| | - Xiaohe Wang
- State Key Laboratory of Nonlinear Mechanics, Institute of MechanicsChinese Academy of Sciences Beijing 100190 P. R. China
| | - Huizeng Li
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Kaixuan Li
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Zheng Li
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Yanlin Song
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
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8
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Guo D, Zheng X, Wang X, Li H, Li K, Li Z, Song Y. Formation of Multicomponent Size‐Sorted Assembly Patterns by Tunable Templated Dewetting. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810728] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Dan Guo
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Xu Zheng
- State Key Laboratory of Nonlinear Mechanics, Institute of MechanicsChinese Academy of Sciences Beijing 100190 P. R. China
| | - Xiaohe Wang
- State Key Laboratory of Nonlinear Mechanics, Institute of MechanicsChinese Academy of Sciences Beijing 100190 P. R. China
| | - Huizeng Li
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Kaixuan Li
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Zheng Li
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
| | - Yanlin Song
- Key Laboratory of Green PrintingInstitute of ChemistryChinese Academy of Sciences Beijing 100190 P. R. China
- Beijing Engineering Research Center of Nanomaterials for Green Printing TechnologyBeijing National Laboratory for Molecular Sciences Beijing 100190 P. R. China
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9
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Abstract
Particle assembly and co-assembly have been research frontiers in chemistry and material science in the past few decades. To achieve a large variety of intricate structures and functional materials, remarkable progress has been made in particle assembly principles and strategies. Essentially, particle assembly is driven by intrinsic interparticle interactions or the external control. In this article, we focus on binary or ternary particle co-assembly and review the principles and feasible strategies. These advances have led to new disciplines of microfabrication technology and material engineering. Although significant achievement on particle-based structures has been made, it is still challenging to fully develop general and facile strategies to precisely control the one-dimensional (1D) co-assembly. This article reviews the recent development on multicomponent particle co-assembly, which significantly increases structural complexity and functional diversity. In particular, we highlight the advances in the particle co-assembly of well-ordered 1D binary superstructures by liquid soft confinement. Finally, prospective outlook for future trends in this field is proposed.
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Affiliation(s)
- Dan Guo
- Department Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,Engineering Research Center of Nanomaterials for Green, Printing Technology, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China.,Department of Chemistry, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanlin Song
- Department Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,Engineering Research Center of Nanomaterials for Green, Printing Technology, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
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10
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Guo D, Li C, Wang Y, Li Y, Song Y. Precise Assembly of Particles for Zigzag or Linear Patterns. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709115] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dan Guo
- Key Laboratory of Green Printing; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- Engineering Research Center of Nanomaterials for Green Printing Technology; Beijing National Laboratory for Molecular Sciences; Beijing 100190 P. R. China
- Department of Chemistry; University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Chang Li
- Key Laboratory of Green Printing; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- Engineering Research Center of Nanomaterials for Green Printing Technology; Beijing National Laboratory for Molecular Sciences; Beijing 100190 P. R. China
- Department of Chemistry; University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Yang Wang
- Key Laboratory of Green Printing; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- Engineering Research Center of Nanomaterials for Green Printing Technology; Beijing National Laboratory for Molecular Sciences; Beijing 100190 P. R. China
| | - Yanan Li
- Key Laboratory of Green Printing; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- Engineering Research Center of Nanomaterials for Green Printing Technology; Beijing National Laboratory for Molecular Sciences; Beijing 100190 P. R. China
- Department of Chemistry; University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Yanlin Song
- Key Laboratory of Green Printing; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 P. R. China
- Engineering Research Center of Nanomaterials for Green Printing Technology; Beijing National Laboratory for Molecular Sciences; Beijing 100190 P. R. China
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11
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Guo D, Li C, Wang Y, Li Y, Song Y. Precise Assembly of Particles for Zigzag or Linear Patterns. Angew Chem Int Ed Engl 2017; 56:15348-15352. [PMID: 29024248 DOI: 10.1002/anie.201709115] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 09/29/2017] [Indexed: 11/09/2022]
Abstract
Precise control of particles assembly has tremendous potential for fabricating intricate structures and functional materials. However, it is still a challenge to achieve one-dimensional assembly with precisely controlled morphology. An effective strategy is reported to precisely assemble particles into well-defined patterns by liquid confinement through controlling the viscosity of the assembly system. It is found that high viscosity of the system impedes particles rearrangement and facilitates the generation of zigzag or twined zigzag assembly structures, while low viscosity of the system allows particles to rearrange into linear or zipper structures driven by lowering the surface deformation of the liquid. As a result, precise control of different assembly patterns can be achieved through tuning the viscosity of solvent and size confinement ratios. This facile approach shows generality for particles assembly of different sizes and materials.
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Affiliation(s)
- Dan Guo
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China.,Department of Chemistry, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chang Li
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China.,Department of Chemistry, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yang Wang
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
| | - Yanan Li
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China.,Department of Chemistry, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yanlin Song
- Key Laboratory of Green Printing, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, P. R. China.,Engineering Research Center of Nanomaterials for Green Printing Technology, Beijing National Laboratory for Molecular Sciences, Beijing, 100190, P. R. China
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12
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Otsuka I, Nilsson N, Suyatin DB, Maximov I, Borsali R. Carbohydrate-based block copolymer systems: directed self-assembly for nanolithography applications. SOFT MATTER 2017; 13:7406-7411. [PMID: 28959807 DOI: 10.1039/c7sm01429e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Self-assembly of block copolymers (BCPs) provides an attractive nanolithography approach, which looks especially promising for fabrication of regular structures with characteristic sizes below 10 nm. Nevertheless, directed self-assembly (DSA) and pattern transfer for BCPs with such small features remain to be a challenge. Here we demonstrate DSA of the maltoheptaose-block-polystyrene (MH1,2k-b-PS4,5k) BCP system using graphoepitaxy. BCP thin films were self-organized by solvent vapor annealing in tetrahydrofuran (THF) and water into sub-10 nm scale cylinders of the maltoheptaose (MH) block oriented horizontally or perpendicularly to the surface in a polystyrene (PS) matrix. The guiding patterns for graphoepitaxy were made by the electron beam lithography (EBL) and lift-off process with the distance gradually varying between 0 and 200 nm. Atomic force microscopy (AFM) investigation of MH1,2k-b-PS4,5k BCP DSA patterns revealed good ordering of vertical and horizontal cylindrical MH arrays for DSA lines with 150-200 nm separation. Reactive ion etching (RIE) of MH1,2k and PS4,5k thin films in O2 and CF4 plasma showed up to 14 times higher etch rate of MH compared to PS. These results indicate that MH1,2k-b-PS4,5k is a promising BCP for nanolithographic applications below 10 nm.
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Affiliation(s)
- I Otsuka
- Univ. Grenoble Alpes, CNRS, CERMAV, 38000 Grenoble, France.
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13
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Asbahi M, Wang F, Dong Z, Yang JKW, Chong KSL. Directed self-assembly of sub-10 nm particle clusters using topographical templates. NANOTECHNOLOGY 2016; 27:424001. [PMID: 27641355 DOI: 10.1088/0957-4484/27/42/424001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Directed self-assembly of nanoparticles (DSA-n) is an approach that creates suitable conditions to capture nanoparticles randomly dispersed in a liquid and position them into predefined locations on a solid template. Although DSA-n is emerging as a potential bottom-up patterning technique to build nanostructures using nanoparticles of various sizes, geometries and material compositions, there are still several outstanding challenges. In this paper, we focus on the DSA-n of sub-10 nm particles using topographical templates to guide them into 1D and 2D ordered arrays. The process mechanism leading DSA-n at sub-10 nm size scale has been reviewed and experimental evidence of the impact of the template on the positioning both individual and clusters of particles with low level of structure defects have also been demonstrated. Furthermore, by controlling the drying direction of the liquid within polygonal traps, we are also able to tune the spacing between the trapped nanoparticle clusters. This self-structuring phenomenon is of crucial importance for various applications such as plasmonics and charge transport within quantum circuits, whereby the coupling effects are highly dependent on the size of the nanoparticles and their separation.
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Affiliation(s)
- Mohamed Asbahi
- Institute of Materials Research and Engineering, A*STAR, 138634, Singapore
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14
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Wang K, Jin SM, Xu J, Liang R, Shezad K, Xue Z, Xie X, Lee E, Zhu J. Electric-Field-Assisted Assembly of Polymer-Tethered Gold Nanorods in Cylindrical Nanopores. ACS NANO 2016; 10:4954-60. [PMID: 27054687 DOI: 10.1021/acsnano.6b00487] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
In this report, we demonstrate the confined assembly of polymer-tethered gold nanorods in anodic aluminum oxide (AAO) channels with the assistance of electric field (EF). Various interesting hybrid assemblies, such as single-, double-, triple-, or quadruple-helix, linear, and hexagonally packed structures are obtained by adjusting pore size in AAO channels, ligand length, and EF orientation. Correspondingly, surface plasmonic property of the assemblies can thus be tuned. This strategy, by coupling of external-field and cylindrically confined assembly, is believed to be a promising approach for generating ordered hybrid assemblies with hierarchical structures, which may find potential applications in photoelectric devices, biosensors, and data storage devices.
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Affiliation(s)
- Ke Wang
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Seon-Mi Jin
- Graduate School of Analytical Science and Technology, Chungnam National University , Daejeon 305764, Republic of Korea
| | - Jiangping Xu
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Ruijing Liang
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Khurram Shezad
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Zhigang Xue
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Xiaolin Xie
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
| | - Eunji Lee
- Graduate School of Analytical Science and Technology, Chungnam National University , Daejeon 305764, Republic of Korea
| | - Jintao Zhu
- Key Laboratory of Materials Chemistry for Energy Conversion and Storage (HUST) of Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
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15
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Dong Z, Asbahi M, Lin J, Zhu D, Wang YM, Hippalgaonkar K, Chu HS, Goh WP, Wang F, Huang Z, Yang JKW. Second-Harmonic Generation from Sub-5 nm Gaps by Directed Self-Assembly of Nanoparticles onto Template-Stripped Gold Substrates. NANO LETTERS 2015; 15:5976-81. [PMID: 26270086 DOI: 10.1021/acs.nanolett.5b02109] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Strong field enhancement and confinement in plasmonic nanostructures provide suitable conditions for nonlinear optics in ultracompact dimensions. Despite these enhancements, second-harmonic generation (SHG) is still inefficient due to the centrosymmetric crystal structure of the bulk metals used, e.g., Au and Ag. Taking advantage of symmetry breaking at the metal surface, one could greatly enhance SHG by engineering these metal surfaces in regions where the strong electric fields are localized. Here, we combine top-down lithography and bottom-up self-assembly to lodge single rows of 8 nm diameter Au nanoparticles into trenches in a Au film. The resultant "double gap" structures increase the surface-to-volume ratio of Au colocated with the strong fields in ∼2 nm gaps to fully exploit the surface SHG of Au. Compared to a densely packed arrangement of AuNPs on a smooth Au film, the double gaps enhance SHG emission by 4200-fold to achieve an effective second-order susceptibility χ((2)) of 6.1 pm/V, making it comparable with typical nonlinear crystals. This patterning approach also allows for the scalable fabrication of smooth gold surfaces with sub-5 nm gaps and presents opportunities for optical frequency up-conversion in applications that require extreme miniaturization.
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Affiliation(s)
- Zhaogang Dong
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore
| | - Mohamed Asbahi
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore
| | - Jian Lin
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , Singapore 117576, Singapore
| | - Di Zhu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore
| | - Ying Min Wang
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore
| | - Kedar Hippalgaonkar
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore
| | - Hong-Son Chu
- Institute of High Performance Computing, A*STAR (Agency for Science, Technology and Research), 1 Fusionopolis Way, #16-16 Connexis, Singapore 138632, Singapore
| | - Wei Peng Goh
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore
| | - Fuke Wang
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore
| | - Zhiwei Huang
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore , Singapore 117576, Singapore
| | - Joel K W Yang
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, Singapore 117602, Singapore
- Singapore University of Technology and Design , 8 Somapah Road, Singapore 487372, Singapore
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16
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Asbahi M, Mehraeen S, Wang F, Yakovlev N, Chong KSL, Cao J, Tan MC, Yang JKW. Large Area Directed Self-Assembly of Sub-10 nm Particles with Single Particle Positioning Resolution. NANO LETTERS 2015; 15:6066-6070. [PMID: 26274574 DOI: 10.1021/acs.nanolett.5b02291] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Directed self-assembly of nanoparticles (DSA-n) holds great potential for device miniaturization in providing patterning resolution and throughput that exceed existing lithographic capabilities. Although nanoparticles excel at assembling into regular close-packed arrays, actual devices on the other hand are often laid out in sparse and complex configurations. Hence, the deterministic positioning of single or few particles at specific positions with low defect density is imperative. Here, we report an approach of DSA-n that satisfies these requirements with less than 1% defect density over micrometer-scale areas and at technologically relevant sub-10 nm dimensions. This technique involves a simple and robust process where a solvent film containing sub-10 nm gold nanoparticles climbs against gravity to coat a prepatterned template. Particles are placed individually into nanoscale cavities, or between nanoposts arranged in varying degrees of geometric complexity. Brownian dynamics simulations suggest a mechanism in which the particles are pushed into the template by a nanomeniscus at the drying front. This process enables particle-based self-assembly to access the sub-10 nm dimension, and for device fabrication to benefit from the wealth of chemically synthesized nanoparticles with unique material properties.
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Affiliation(s)
- Mohamed Asbahi
- Institute of Materials Research and Engineering , A*STAR, 3 Research Link, Singapore 117602
| | - Shafigh Mehraeen
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Fuke Wang
- Institute of Materials Research and Engineering , A*STAR, 3 Research Link, Singapore 117602
| | - Nikolai Yakovlev
- Institute of Materials Research and Engineering , A*STAR, 3 Research Link, Singapore 117602
| | - Karen S L Chong
- Institute of Materials Research and Engineering , A*STAR, 3 Research Link, Singapore 117602
| | - Jianshu Cao
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
| | - Mei Chee Tan
- Pillar of Engineering Product Development, Singapore University of Technology and Design , 8 Somapah Road, Singapore 487372
| | - Joel K W Yang
- Institute of Materials Research and Engineering , A*STAR, 3 Research Link, Singapore 117602
- Pillar of Engineering Product Development, Singapore University of Technology and Design , 8 Somapah Road, Singapore 487372
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17
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Cai J, Lv C, Watanabe A. Facile Preparation of Hierarchical Structures Using Crystallization-Kinetics Driven Self-Assembly. ACS APPLIED MATERIALS & INTERFACES 2015; 7:18697-18706. [PMID: 26247223 DOI: 10.1021/acsami.5b05177] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Hierarchical structures (HSs) constructed by nanoparticle-based building blocks possess not only the properties of the primary building blocks but also collective properties of the assemblies. Here we report the facile preparation of hierarchical Ag nanoparticles/polyhedral oligomeric silsequioxane molecule (POSS) hybrid branched structures within tens of seconds by using spin-coating and doctor-blade methods. An assembly mechanism mainly controlled by POSS-crystallization kinetics and space resistance of Ag nanoparticles toward the diffusion of POSS molecules was tentatively proposed. It was demonstrated as a universal method for the preparation of hierarchical hybrid branched structures on arbitrary substrates, as well as by using other different POSS and inorganic nanoparticles. As a demonstration, Ag hierarchical structures obtained by heat treatment exhibit excellent SERS performance with enhancement factors as high as on the order of 10(7), making them promising sensors for the detection of trace amount of analyte adsorbed on the surface. Two-dimensional SERS mapping was also demonstrated by using a direct imaging system with high mapping speed and high resolution. Moreover, the substrates with Ag hierarchical structures were used as a SERS sensor for in situ detection due to the excellent SERS performance and stability of the structures.
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Affiliation(s)
- Jinguang Cai
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
- China Academy of Engineering Physics , P.O. Box 919-71, Mianyang 621900, Sichuan, People's Republic of China
| | - Chao Lv
- China Academy of Engineering Physics , P.O. Box 919-71, Mianyang 621900, Sichuan, People's Republic of China
| | - Akira Watanabe
- Institute of Multidisciplinary Research for Advanced Materials, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
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18
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Mehraeen S, Asbahi M, Fuke W, Yang JKW, Cao J, Tan MC. Directed Self-Assembly of sub-10 nm Particles: Role of Driving Forces and Template Geometry in Packing and Ordering. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8548-8557. [PMID: 26147183 DOI: 10.1021/acs.langmuir.5b01696] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
By comparing the magnitude of forces, a directed self-assembly mechanism has been suggested previously in which immersion capillary is the only driving force responsible for packing and ordering of nanoparticles, which occur only after the meniscus recedes. However, this mechanism is insufficient to explain vacancies formed by directed self-assembly at low particle concentrations. Utilizing experiments, and Monte Carlo and Brownian dynamics simulations, we developed a theoretical model based on a new proposed mechanism. In our proposed mechanism, the competing driving forces controlling the packing and ordering of sub-10 nm particles are (1) the repulsive component of the pair potential and (2) the attractive capillary forces, both of which apply at the contact line. The repulsive force arises from the high particle concentration, and the attractive force is caused by the surface tension at the contact line. Our theoretical model also indicates that the major part of packing and ordering of nanoparticles occurs before the meniscus recedes. Furthermore, utilizing our model, we are able to predict the various self-assembly configurations of particles as their size increases. These results lay out the interplay between driving forces during directed self-assembly, motivating a better template design now that we know the importance and the dominating driving forces in each regime of particle size.
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Affiliation(s)
- Shafigh Mehraeen
- †Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 4873372
- ‡Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mohamed Asbahi
- §Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), Singapore 117602
| | - Wang Fuke
- §Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), Singapore 117602
| | - Joel K W Yang
- †Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 4873372
- §Institute of Materials Research and Engineering, Agency for Science, Technology and Research (A*STAR), Singapore 117602
| | - Jianshu Cao
- ‡Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Mei Chee Tan
- †Pillar of Engineering Product Development, Singapore University of Technology and Design, Singapore 4873372
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19
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Tisserant JN, Reissner PA, Beyer H, Fedoryshyn Y, Stemmer A. Water-Mediated Assembly of Gold Nanoparticles into Aligned One-Dimensional Superstructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7220-7. [PMID: 26072942 DOI: 10.1021/acs.langmuir.5b01135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
This Article shows that water in ethanol colloids of gold nanoparticles enhances the formation of linear clusters and, more important for applications in electronics, determines their assembly on surfaces. We show by dynamic light scattering that ethanol colloids contain mainly monomers and dimers and that wormlike superstructures are mostly absent, despite UV-vis evidence of aggregation. Water added to the colloid as a cosolvent was found to enhance the number of clusters as well as their average size, confirming its role in linear self-assembly, on the scale of a few particles. Water adsorbed from the atmosphere during coating was also found to be a powerful lever to tune self-assembly on surfaces. By varying the relative humidity, a sharp transition from branched to linear superstructures was observed, showing the importance of water as a cosolvent in the formation of cluster superstructures. We show that one-dimensional superstructures may form due to long-range mobility of precursor clusters on wet surfaces, allowing their rearrangement. The understanding of the phenomenon allows us to statistically align both clusters and resulting superstructures on patterned substrates, opening the way to rapid screening in molecular electronics.
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Affiliation(s)
| | - Patrick A Reissner
- †Nanotechnology Group, ETH Zurich, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland
| | - Hannes Beyer
- †Nanotechnology Group, ETH Zurich, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland
| | - Yuriy Fedoryshyn
- ‡Institute of Electromagnetic Fields, ETH Zurich, Gloriastrasse 35, CH-8092 Zurich, Switzerland
| | - Andreas Stemmer
- †Nanotechnology Group, ETH Zurich, Säumerstrasse 4, CH-8803 Rüschlikon, Switzerland
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