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Jiang S, Wang J, Lu J, Wang B, Li X, Mei M. Preparation and Mechanical Properties of Core-Shell PS&CeO 2 Composite Abrasive Particles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2024; 40:8115-8125. [PMID: 38563662 DOI: 10.1021/acs.langmuir.4c00141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Core-shell composite abrasive particles are a topic of great interest in surface finishing. It is important to explore the preparation technology and performance parameters associated with them. In this paper, a core-shell composite abrasive particle made of polystyrene and cerium oxide (PS&CeO2, CSPC), which is rigid on the outside and flexible on the inside, is proposed. The microstructure, physical phase characteristics, and mechanical properties of the inner core and composite abrasive particles are investigated. PS microspheres and CSPC composite abrasive particles with different structural features were prepared through a series of experiments, morphological observations, and physical and chemical characterization experiments. Their microstructures and physical phase properties were investigated. The indentation load curves of the PS microspheres and CSPC composite abrasive samples were measured by using an atomic force microscope. The analysis focused on the effects of various dimensional and structural parameters on the modulus of elasticity of both PS microspheres and CSPC composite abrasive particles. The analysis shows that the experimentally prepared PS microspheres have good dispersion, a smooth surface, and a uniform particle size distribution. The prepared CSPC composite abrasive particles are regular spheres with rough, rice-like surfaces, low modulus of elasticity, and overall nonrigid and soft elastic properties. The results of this paper can provide a guide for the preparation technology, performance regulation, and application of polymer microspheres and core-shell composite abrasive particles in CMP.
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Affiliation(s)
- Shengqiang Jiang
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
- Engineering Research Center of Complex Tracks Processing Technology and Equipment of Ministry of Education, Xiangtan 411105, China
- Hunan Shaofeng Institute for Applied Mathematics, Xiangtan 411105, China
| | - Jinjie Wang
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
| | - Jian Lu
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
| | - Bianfen Wang
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
| | - Xu Li
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
- Engineering Research Center of Complex Tracks Processing Technology and Equipment of Ministry of Education, Xiangtan 411105, China
| | - Ming Mei
- School of Mechanical Engineering and Mechanics, Xiangtan University, Xiangtan 411105, China
- Engineering Research Center of Complex Tracks Processing Technology and Equipment of Ministry of Education, Xiangtan 411105, China
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Lotito V, Karlušić M, Jakšić M, Tomić Luketić K, Müller U, Zambelli T, Fazinić S. Shape Deformation in Ion Beam Irradiated Colloidal Monolayers: An AFM Investigation. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E453. [PMID: 32138349 PMCID: PMC7153618 DOI: 10.3390/nano10030453] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/22/2020] [Accepted: 02/28/2020] [Indexed: 01/05/2023]
Abstract
Self-assembly of colloidal monolayers represents a prominent approach to the fabrication of nanostructures. The modification of the shape of colloidal particles is essential in order to enrich the variety of attainable patterns which would be limited by the typical assembly of spherical particles in a hexagonal arrangement. Polymer particles are particularly promising in this sense. In this article, we investigate the deformation of closely-packed polystyrene particles under MeV oxygen ion irradiation at normal incidence using atomic force microscopy (AFM). By developing a procedure based on the fitting of particle topography with quadrics, we reveal a scenario of deformation more complex than the one observed in previous studies for silica particles, where several phenomena, including ion hammering, sputtering, chemical modifications, can intervene in determining the final shape due to the specific irradiation conditions. In particular, deformation into an ellipsoidal shape is accompanied by shrinkage and polymer redistribution with the presence of necks between particles for increasing ion fluence. In addition to casting light on particle irradiation in a regime not yet explored, we present an effective method for the characterization of the colloidal particle morphology which can be applied to describe and understand particle deformation in other regimes of irradiation or with different techniques.
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Affiliation(s)
- Valeria Lotito
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia; (M.K.); (M.J.); (K.T.L.)
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, Gloriastrasse 35, 8092 Zurich, Switzerland;
| | - Marko Karlušić
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia; (M.K.); (M.J.); (K.T.L.)
| | - Milko Jakšić
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia; (M.K.); (M.J.); (K.T.L.)
| | - Kristina Tomić Luketić
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia; (M.K.); (M.J.); (K.T.L.)
| | - Ulrich Müller
- Nanoscale Materials Science, Empa—Swiss Federal Laboratories for Materials Science and Technology, 8600 Dübendorf, Switzerland;
| | - Tomaso Zambelli
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zurich, Gloriastrasse 35, 8092 Zurich, Switzerland;
| | - Stjepko Fazinić
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia; (M.K.); (M.J.); (K.T.L.)
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A general strategy to fabricate photonic crystal heterostructure with Programmed photonic stopband. J Colloid Interface Sci 2018; 509:318-326. [PMID: 28918374 DOI: 10.1016/j.jcis.2017.08.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/31/2017] [Accepted: 08/01/2017] [Indexed: 11/23/2022]
Abstract
In this paper, we present a general fabrication strategy to achieve the structure control and the flexible photonic stop band regulation of (2+1) D photonic crystal heterostructures (PCHs) by layer-by-layer depositing the annealed colloidal crystal monolayers of different sphere size. The optical properties of the resulting (2+1) DPCHs with different lattice constants were systematically studied and a universal photonic stopband variation rule was proposed, which makes it possible to program any kind of stopband structure as required, such as dual- or multi-stopbands PCH and ultra-wide stopband PCH. Furthermore, PCH with dual-stopbands overlapping the excitation wavelength (E) and emission wavelength(F) of Ru complex was fabricated by finely manipulating the spheres' diameter of colloidal monolayers. And an additional 2-fold fluorescence enhancement in comparison to that on the single stopband sample was achieved. This strategy affords new opportunities for delicate engineering the photonic behaviour of PCH, and also is of great significance for the practical application based on their bandgap property.
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Lotito V, Zambelli T. Approaches to self-assembly of colloidal monolayers: A guide for nanotechnologists. Adv Colloid Interface Sci 2017; 246:217-274. [PMID: 28669390 DOI: 10.1016/j.cis.2017.04.003] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Revised: 04/04/2017] [Accepted: 04/05/2017] [Indexed: 01/08/2023]
Abstract
Self-assembly of quasi-spherical colloidal particles in two-dimensional (2D) arrangements is essential for a wide range of applications from optoelectronics to surface engineering, from chemical and biological sensing to light harvesting and environmental remediation. Several self-assembly approaches have flourished throughout the years, with specific features in terms of complexity of the implementation, sensitivity to process parameters, characteristics of the final colloidal assembly. Selecting the proper method for a given application amidst the vast literature in this field can be a challenging task. In this review, we present an extensive classification and comparison of the different techniques adopted for 2D self-assembly in order to provide useful guidelines for scientists approaching this field. After an overview of the main applications of 2D colloidal assemblies, we describe the main mechanisms underlying their formation and introduce the mathematical tools commonly used to analyse their final morphology. Subsequently, we examine in detail each class of self-assembly techniques, with an explanation of the physical processes intervening in crystallization and a thorough investigation of the technical peculiarities of the different practical implementations. We point out the specific characteristics of the set-ups and apparatuses developed for self-assembly in terms of complexity, requirements, reproducibility, robustness, sensitivity to process parameters and morphology of the final colloidal pattern. Such an analysis will help the reader to individuate more easily the approach more suitable for a given application and will draw the attention towards the importance of the details of each implementation for the final results.
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Huang P, Zhang L, Yan Q, Guo D, Xie G. Size Dependent Mechanical Properties of Monolayer Densely Arranged Polystyrene Nanospheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:13187-13192. [PMID: 27951716 DOI: 10.1021/acs.langmuir.6b03481] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In contrast to macroscopic materials, the mechanical properties of polymer nanospheres show fascinating scientific and application values. However, the experimental measurements of individual nanospheres and quantitative analysis of theoretical mechanisms remain less well performed and understood. We provide a highly efficient and accurate method with monolayer densely arranged honeycomb polystyrene (PS) nanospheres for the quantitatively mechanical characterization of individual nanospheres on the basis of atomic force microscopy (AFM) nanoindentation. The efficiency is improved by 1-2 orders, and the accuracy is also enhanced almost by half-order. The elastic modulus measured in the experiments increases with decreasing radius to the smallest nanospheres (25-35 nm in radius). A core-shell model is introduced to predict the size dependent elasticity of PS nanospheres, and the theoretical prediction agrees reasonably well with the experimental results and also shows a peak modulus value.
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Affiliation(s)
- Peng Huang
- State Key Laboratory of Tribology, Tsinghua University , Beijing 100084, China
- Sicence and Technology on Surface Physics and Chemistry Laboratory , Mianyang 621908, Sichuan, China
| | - Lijing Zhang
- School of Chemistry, Dalian University of Technology , Dalian 116024, Liaoning, China
| | - Qingfeng Yan
- Department of Chemistry, Tsinghua University , Beijing 100084, China
| | - Dan Guo
- State Key Laboratory of Tribology, Tsinghua University , Beijing 100084, China
| | - Guoxin Xie
- State Key Laboratory of Tribology, Tsinghua University , Beijing 100084, China
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Abstract
In this work, a combination of amplitude-modulated non-contact atomic force microscopy and atomic force spectroscopy is applied for instrumented hardness measurements on an Au(111) surface with atomistic resolution of single plasticity events. A careful experimental procedure is described that includes the force sensor selection, its calibration, the calibration of the cantilever deflection detection system, and the minimization of instrumental drift for accurate and reproducible force-distance measurements. Also, a method for the data analysis is presented that allows the extraction of force-penetration curves from recorded force-distance curves. A typical curve displays a clear elastic deformation regime up to the first plasticity event, or pop-in, with a length in the range of one to two Burger's vectors. Later plasticity events exhibit the same magnitude. The work of plasticity is further extracted from the measurements. Finally, the hardness is determined in combination with the indentation curve using non-contact atomic force microscopy images of the remaining indents.
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Affiliation(s)
- Arnaud Caron
- School of Energy, Materials and Chemical Engineering, KoreaTech, Korea University of Technology and Education;
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