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Kang M, Kim J, Lim H, Ko J, Kim HS, Joo Y, Moon SY, Jang SG, Lee E, Ahn S. Eco-Friendly Dispersant-Free Purification Method of Boron Nitride Nanotubes through Controlling Surface Tension and Steric Repulsion with Solvents. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2593. [PMID: 37764622 PMCID: PMC10537017 DOI: 10.3390/nano13182593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023]
Abstract
Boron nitride nanotubes (BNNTs) were purified without the use of a dispersant by controlling the surface tension and steric repulsion of solvent molecules. This method effectively enhanced the difference in solubilities of impurities and BNNTs. The purification process involved optimizing the alkyl-chains of alcohol solvents and adjusting the concentration of alcohol solvent in water to regulate surface tension and steric repulsion. Among the solvents tested, a 70 wt% t-butylalcohol in water mixture exhibited the highest selective isolation of BNNTs from impurities based on differences in solubilities. This favorable outcome was attributed to the surface tension matching with BNNTs, steric repulsion from bulky alkyl chain structures, and differences in interfacial energy between BNNT-liquid and impurity-liquid interfaces. Through this optimized purification process, impurities were removed to an extent of up to 93.3%. Additionally, the purified BNNTs exhibited a distinct liquid crystal phase, which was not observed in the unpurified BNNTs.
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Affiliation(s)
- Minsung Kang
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea; (M.K.)
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Jungmo Kim
- Nano Hybrid Technology Research Center, Korea Electrotechnology Research Institute (KERI), Changwon-si 51543, Republic of Korea
| | - Hongjin Lim
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea; (M.K.)
| | - Jaehyoung Ko
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea; (M.K.)
| | - Hong-Sik Kim
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea; (M.K.)
| | - Yongho Joo
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea; (M.K.)
| | - Se Youn Moon
- Department of Quantum System Engineering, Jeonbuk National University, Jeonju-si 54896, Republic of Korea
| | - Se Gyu Jang
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea; (M.K.)
| | - Eunji Lee
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Republic of Korea
| | - Seokhoon Ahn
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeonbuk 55324, Republic of Korea; (M.K.)
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Lim H, Kim YK, Kim HS, Lee T, Hossain MM, Jeong HO, Lee HS, Cho H, Joo Y, Lee SS, Park S, Rho H, Jeong HS, Kim MJ, Ahn S, Moon SY, Kim KS, Choi SQ, Kim BJ, Jang SG. Lyotropic Boron Nitride Nanotube Liquid Crystals: Preparation, Characterization, and Wet-Spinning for Fabrication of Composite Fiber. ACS APPLIED MATERIALS & INTERFACES 2023; 15:24681-24692. [PMID: 37163756 DOI: 10.1021/acsami.3c00189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Microfiber fabrication via wet-spinning of lyotropic liquid crystals (LCs) with anisotropic nanomaterials has gained increased attention due to the microfibers' excellent physical/chemical properties originating from the unidirectional alignment of anisotropic nanomaterials along the fiber axis with high packing density. For wet-spinning of the microfibers, however, preparing lyotropic LCs by achieving high colloidal stability of anisotropic nanomaterials, even at high concentrations, has been a critically unmet prerequisite, especially for recently emerging nanomaterials. Here, we propose a cationically charged polymeric stabilizer that can efficiently be adsorbed on the surface of boron nitride nanotubes (BNNTs), which provide steric hindrance in combination with Coulombic repulsion leading to high colloidal stability of BNNTs up to 22 wt %. The BNNT LCs prepared from the dispersions with various stabilizers were systematically compared using optical and rheological analysis to optimize the phase behavior and rheological properties for wet-spinning of the BNNT LCs. Systematic optical and mechanical characterizations of the BNNT microfibers with aligned BNNTs along the fiber axis revealed that properties of the microfibers, such as their tensile strength, packing density, and degree of BNNT alignment, were highly dependent on the quality of BNNT LCs directly related to the types of stabilizers.
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Affiliation(s)
- Hongjin Lim
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Young-Kyeong Kim
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Hong-Sik Kim
- School of Chemical Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
| | - Taegeon Lee
- Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Md Monir Hossain
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
- Department of Chemistry, Department of Bioactive Materials Sciences, and Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea
| | - Hyun-Oh Jeong
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Heon Sang Lee
- Department of Chemical Engineering, Dong-A University, Busan 49315, Republic of Korea
| | - Hyunjin Cho
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Yongho Joo
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Sang Seok Lee
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Sungjune Park
- Department of Polymer-Nano Science and Technology, Department of Nano Convergence Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Heesuk Rho
- Department of Physics, Research Institute of Physics and Chemistry, Jeonbuk National University, Jeonju 54896, Republic of Korea
| | - Hyeon Su Jeong
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Myung Jong Kim
- Department of Chemistry, Gachon University, 1342 Seongnam-daero, Sujeong-gu, Seongnam-si, Gyeonggi-do 13120, Republic of Korea
| | - Seokhoon Ahn
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
| | - Se Youn Moon
- Department of Quantum System Engineering, Jeonbuk National University, 567, Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
- High-Enthalpy Plasma Research Center, Jeonbuk National University, 546 Bongdong-ro, Bongdong-eup, Wanju-gun, Jeollabuk-do 55317, Republic of Korea
| | - Keun Su Kim
- Security and Disruptive Technologies Research Centre, Emerging Technologies Division, National Research Council Canada, Ottawa, Ontario K1A 0R6, Canada
| | - Siyoung Q Choi
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- KAIST Institute for the NanoCentury, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Bumjoon J Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Se Gyu Jang
- Functional Composite Materials Research Center, Institute of Advanced Composites Materials, Korea Institute of Science and Technology, Wanju, Jeonbuk 55324, Republic of Korea
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Ghule B, Laad M. A study of solubility parameters on dispersion, dissolution, and homogenization of reinforcement TiO 2 and poly(4-methyl-1-Pentene) in different solvents for the fabrication of TiO 2/PMP composite film. CHEM ENG COMMUN 2022. [DOI: 10.1080/00986445.2022.2059356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Babaji Ghule
- Symbiosis Institute of Technology (SIT), Symbiosis International (Deemed University) (SIU), Lavale, Pune, India
| | - Meena Laad
- Symbiosis Institute of Technology (SIT), Symbiosis International (Deemed University) (SIU), Lavale, Pune, India
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Budy SM, Son DY. Ethynyl-functionalized BNNT and preparation of polyarylene-BNNT nanocomposites. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Lu X, Zhang C, Agarwal A, Chen Y. Homogeneous dispersion of boron nitride nanoplatelets in powder feedstocks for plasma spraying. ADV POWDER TECHNOL 2021. [DOI: 10.1016/j.apt.2021.09.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Kode VR, Hinkle KR, Ao G. Interaction of DNA-Complexed Boron Nitride Nanotubes and Cosolvents Impacts Dispersion and Length Characteristics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:10934-10944. [PMID: 34496213 DOI: 10.1021/acs.langmuir.1c01309] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Processing boron nitride nanotubes (BNNTs) for applications ranging from nanomedicine to electronics generally requires dispersions of nanotubes that are stable in various compounds and solvents. We show that alcohol/water cosolvents, particularly isopropyl alcohol (IPA), are essential for the complexation of BNNTs with DNA under mild bath sonication. The resulting DNA-wrapped BNNT complexes are highly stable during purification and solvent exchange from cosolvents to water, providing potential for the versatile liquid-phase processing of BNNTs. Via molecular dynamics simulations, we demonstrate that IPA assists in the solvation of BNNTs due to its pseudosurfactant nature by verifying that water is replaced in the solvation layer as IPA is added. We quantify the solvation free energy of BNNTs in various IPA/water mixtures and observe a nonmonotonic trend, highlighting the importance of utilizing solvent-nanotube interactions in nanomaterial dispersions. Additionally, we show that nanotube lengths can be characterized by rheology measurements via determining the viscosity of dilute dispersions of DNA-BNNTs. This represents the bulk sample property in the liquid state, as compared to conventional imaging techniques that require surface deposition and drying. Our results also demonstrate that BNNT dispersions exhibit the rheological behavior of dilute Brownian rigid rods, which can be further exploited for the controlled processing and property enhancement of BNNT-enabled assemblies such as films and fibers.
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Affiliation(s)
- Venkateswara R Kode
- Department of Chemical and Biomedical Engineering, Washkewicz College of Engineering, Cleveland State University, 2121 Euclid Avenue, Cleveland, Ohio 44115, United States
| | - Kevin R Hinkle
- Department of Chemical and Materials Engineering, University of Dayton, 300 College Park, Dayton, Ohio 45469, United States
| | - Geyou Ao
- Department of Chemical and Biomedical Engineering, Washkewicz College of Engineering, Cleveland State University, 2121 Euclid Avenue, Cleveland, Ohio 44115, United States
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Mohammadi MD, Abdullah HY, Biskos G, Bhowmick S. Effect of Al- and Ga-doping on the adsorption of H 2 SiCl 2 onto the outer surface of boron nitride nanotube: a DFT study. CR CHIM 2021. [DOI: 10.5802/crchim.87] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yu I, Jo Y, Ko J, Moon SY, Ahn S, Joo Y. Highly Aligned Array of Heterostructured Polyflourene-Isolated Boron Nitride and Carbon Nanotubes. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12417-12424. [PMID: 33650842 DOI: 10.1021/acsami.1c02315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Boron nitride nanotubes (BNNTs) have attracted increasing attention for their exceptional thermal, electronic, and optical properties. However, the progress in BNNTs applications has largely been limited by the low purity of as-synthesized BNNTs and inefficient solution-processing protocols due mainly to the instability of BNNTs in most of the solvents. Therefore, fabrication of highly pure, stable, and fully individualized BNNTs in a rational manner is required. Here, we report a significant improvement in the preparation of well-dispersed BNNTs, utilizing conjugated polymers that interact with BNNTs, allowing selective sorting and individualization of the nanotubes. Evidence of strong interactions between the polymers and BNNTs was observed by optical absorption and photoluminescence spectroscopies, while effective individualization was observed by electron microscopy. The sorted BNNTs were successfully used in a solution-processing protocol called dose-controlled, floating evaporative self-assembly (DFES) previously established for single-walled carbon nanotubes (SWCNT) array fabrication. A device fabricated via DFES from the sorted BNNTs mixed with polymer-wrapped, semiconducting single-walled carbon nanotubes (s-SWCNTs) exhibited an on-state conductance of 253 ± 6 μS μm-1 and an on/off ratio of 106.6±0.4 for a gate voltage of -0.1 V. This breakthrough in BNNT dispersion and isolation is a significant advancement toward the exploitation of BNNTs in future applications.
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Affiliation(s)
- Ilhwan Yu
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeonbuk 55324, Republic of Korea
- Department of Nanoconvergence Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Yerin Jo
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeonbuk 55324, Republic of Korea
- Department of Chemistry, Hanyang University, 222 Wangsimni-ro, Seoul 04763, Republic of Korea
| | - Jaehyoung Ko
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeonbuk 55324, Republic of Korea
| | - Se Youn Moon
- Department of Quantum System Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do 54896, Republic of Korea
| | - Seokhoon Ahn
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeonbuk 55324, Republic of Korea
| | - Yongho Joo
- Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), 92 Chudong-ro, Bongdong-eup, Wanju-gun, Jeonbuk 55324, Republic of Korea
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Snapp P, Cho C, Lee D, Haque MF, Nam S, Park C. Tunable Piezoelectricity of Multifunctional Boron Nitride Nanotube/Poly(dimethylsiloxane) Stretchable Composites. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2004607. [PMID: 32954543 DOI: 10.1002/adma.202004607] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/24/2020] [Indexed: 06/11/2023]
Abstract
Boron nitride nanotubes (BNNT) uniformly dispersed in stretchable materials, such as poly(dimethylsiloxane) (PDMS), could create the next generation of composites with augmented mechanical, thermal, and piezoelectric characteristics. This work reports tunable piezoelectricity of multifunctional BNNT/PDMS stretchable composites prepared via co-solvent blending with tetrahydrofuran (THF) to disperse BNNTs in PDMS while avoiding sonication or functionalization. The resultant stretchable BNNT/PDMS composites demonstrate augmented Young's modulus (200% increase at 9 wt% BNNT) and thermal conductivity (120% increase at 9 wt% BNNT) without losing stretchability. Furthermore, BNNT/PDMS composites demonstrate piezoelectric responses that are linearly proportional to BNNT wt%, achieving a piezoelectric constant (|d33 |) of 18 pmV-1 at 9 wt% BNNT without poling, which is competitive with commercial piezoelectric polymers. Uniquely, BNNT/PDMS accommodates tensile strains up to 60% without plastic deformation by aligning BNNTs, which enhances the composites' piezoelectric response approximately five times. Finally, the combined stretchable and piezoelectric nature of the composite was exploited to produce a vibration sensor sensitive to low-frequency (≈1 kHz) excitation. This is the first demonstration of multifunctional, stretchable BNNT/PDMS composites with enhanced mechanical strength and thermal conductivity and furthermore tunable piezoelectric response by varying BNNT wt% and applied strain, permitting applications in soft actuators and vibration sensors.
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Affiliation(s)
- Peter Snapp
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Chullhee Cho
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Dongwon Lee
- Department of Mechanical and Aerospace Engineering, North Carolina State University, Raleigh, NC, 27695, USA
- National Institute of Aerospace, Hampton, VA, 23666, USA
| | - Md Farhadul Haque
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - SungWoo Nam
- Department of Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801, USA
| | - Cheol Park
- Advanced Materials and Processing Branch, NASA Langley Research Center, Hampton, VA, 23681, USA
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Torres Castillo CS, Bruel C, Tavares JR. Chemical affinity and dispersibility of boron nitride nanotubes. NANOSCALE ADVANCES 2020; 2:2497-2506. [PMID: 36133361 PMCID: PMC9419523 DOI: 10.1039/d0na00136h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 05/04/2020] [Indexed: 05/09/2023]
Abstract
Boron nitride nanotubes (BNNTs) are electrically insulating nanoparticles that display highly competitive elastic modulus and thermal conductivity. Long presented as potential fillers for nanocomposite applications, their poor dispersibility in most commodity polymers has, however, limited their spread. In this work, the chemical affinity of purified BNNTs, measured in terms of Hansen solubility parameters (HSP), were obtained through sedimentation tests in a wide set of organic solvents, taking into account relative sedimentation time. The parameters obtained were {δ d; δ p; δ h} = {16.8; 10.7; 14.7} ± {0.3; 0.9; 0.3} MPa1/2, with a Hildebrand parameter, δ t = 24.7 MPa1/2 and a sphere radius of 5.4 MPa1/2. The solubility parameters were determined considering complete dispersion of the purified nanomaterial, as well as the viscosity and density of the host solvent. These factors, combined with the high purity of the BNNTs, are crucial to minimize the uncertainty of the HSP characterization. Such refined values provide necessary insights both to optimize the solvent casting of unmodified BNNTs, and to orient the surface modification efforts that would be needed to integrate these nanomaterials into a wider range of host matrices.
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Affiliation(s)
- C S Torres Castillo
- CREPEC, Chemical Engineering Department, Polytechnique Montréal 2900 Edouard Montpetit Blvd Montréal Québec QC H3T 1J4 Canada
| | - C Bruel
- CREPEC, Chemical Engineering Department, Polytechnique Montréal 2900 Edouard Montpetit Blvd Montréal Québec QC H3T 1J4 Canada
| | - J R Tavares
- CREPEC, Chemical Engineering Department, Polytechnique Montréal 2900 Edouard Montpetit Blvd Montréal Québec QC H3T 1J4 Canada
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Kim JH, Cho H, Pham TV, Hwang JH, Ahn S, Jang SG, Lee H, Park C, Kim CS, Kim MJ. Dual growth mode of boron nitride nanotubes in high temperature pressure laser ablation. Sci Rep 2019; 9:15674. [PMID: 31666654 PMCID: PMC6821736 DOI: 10.1038/s41598-019-52247-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 10/01/2019] [Indexed: 11/29/2022] Open
Abstract
The morphological analysis of the end of boron nitride nanotubes (BNNTs) using high-resolution transmission electron microscopy (HR-TEM) can provide valuable insight into the growth mechanism in high temperature pressure (HTP) laser ablation where the best quality of BNNT materials can be obtained so far. Two growth modes of BNNT coexisting during the synthesis process have been proposed based on HR-TEM observation and length analysis. One is the root growth mode, in which boron nitride (BN) species formed via the surface interaction between surrounding N2 molecules and boron nanodroplets incorporate into the tubular structure. Another mode called open-end growth mode means the prolongation of tube growth from the exposed BN edge surrounding the surface of boron nanodroplets which is constructed by the heterogeneous nucleation of absorbed BN radicals from the gas plume. The statistical data, the proportions of end structures and the length of BNNTs, could be fitted to two growth modes, and the open-end growth mode is found to be especially effective in producing longer nanotubes with a higher growth rate. The scientific understanding of the growth mechanism is believed to provide the control for optimized production of BNNTs.
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Affiliation(s)
- Jun Hee Kim
- Functional Composite Materials Research Center, Korea Institute of Science and Technology, Wanju, 55324, Republic of Korea
- Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Hyunjin Cho
- Functional Composite Materials Research Center, Korea Institute of Science and Technology, Wanju, 55324, Republic of Korea
- Security and Disruptive Technologies Research Centre, National Research Council Canada, 1200 Montreal Road, Ottawa, Ontario, K1A 0R6, Canada
| | - Thang Viet Pham
- Functional Composite Materials Research Center, Korea Institute of Science and Technology, Wanju, 55324, Republic of Korea
- Division of Nano & Information Technology, KIST School, Korea University of Science and Technology, Seoul, 02792, Republic of Korea
| | - Jae Hun Hwang
- Functional Composite Materials Research Center, Korea Institute of Science and Technology, Wanju, 55324, Republic of Korea
- Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju, 54896, Republic of Korea
| | - Seokhoon Ahn
- Functional Composite Materials Research Center, Korea Institute of Science and Technology, Wanju, 55324, Republic of Korea
| | - Se Gyu Jang
- Functional Composite Materials Research Center, Korea Institute of Science and Technology, Wanju, 55324, Republic of Korea
| | - Hunsu Lee
- Composite Materials Applications Research Center, Korea Institute of Science and Technology, Wanju, 55324, Republic of Korea
| | - Cheol Park
- Advanced Materials and Processing Branch, NASA Langley Research Center, Hampton, Virginia, 23681, USA
| | - Cheol Sang Kim
- Department of Bionanosystem Engineering, Graduate School, Jeonbuk National University, Jeonju, 54896, Republic of Korea.
- Division of Mechanical Design Engineering, Jeonbuk National University, Jeonju, 54896, Republic of Korea.
| | - Myung Jong Kim
- Functional Composite Materials Research Center, Korea Institute of Science and Technology, Wanju, 55324, Republic of Korea.
- Division of Nano & Information Technology, KIST School, Korea University of Science and Technology, Seoul, 02792, Republic of Korea.
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12
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Basma N, Cullen PL, Clancy AJ, Shaffer MSP, Skipper NT, Headen TF, Howard CA. The liquid structure of the solvents dimethylformamide (DMF) and dimethylacetamide (DMA). Mol Phys 2019. [DOI: 10.1080/00268976.2019.1649494] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- N. Basma
- Department of Physics & Astronomy, University College London, London, UK
- Department of Chemistry and Department of Materials, Imperial College London, London, UK
| | - P. L. Cullen
- Department of Chemical Engineering, University College London, London, UK
| | - A. J. Clancy
- Department of Physics & Astronomy, University College London, London, UK
- Department of Chemistry, University College London, London, UK
| | - M. S. P. Shaffer
- Department of Chemistry and Department of Materials, Imperial College London, London, UK
| | - N. T. Skipper
- Department of Physics & Astronomy, University College London, London, UK
| | - T. F. Headen
- ISIS Neutron and Muon Source, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Didcot, UK
| | - C. A. Howard
- Department of Physics & Astronomy, University College London, London, UK
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Boron Nitride Nanotubes as Filler for Resin-Based Dental Sealants. Sci Rep 2019; 9:7710. [PMID: 31118474 PMCID: PMC6531453 DOI: 10.1038/s41598-019-44246-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/13/2019] [Indexed: 02/01/2023] Open
Abstract
The aim of this study was to evaluate the influence of boron-nitride nanotubes (BNNTs) on the properties of resin-based light-curing dental sealants (RBSs) when incorporated at different concentration. RBSs were formulated using methacrylate monomers (90 wt.% TEGDMA, 10 wt.% Bis-GMA). BNNTs were added to the resin blend at 0.1 wt.% and 0.2 wt.%. A Control group without filler was also designed. Degree of conversion, ultimate tensile strength, contact angle, surface free energy, surface roughness and color of the RBSs were evaluated for the tested materials. Their cytotoxicity and mineral deposition ability (Bioactivity) were also assessed. A suitable degree of conversion, no effect in mechanical properties and no cytotoxic effect was observed for the experimental materials. Moreover, the surface free energy and the surface roughness decreased with the addition of BNNTs. While the color analysis showed no difference between specimens containing BNNTs and the control group. Mineral deposition occurred in all specimens containing BNNTs after 7d. In conclusion, the incorporation of BNNTs may provide bioactivity to resin-based dental sealants and reduce their surface free energy.
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Harrison H, Lamb JT, Nowlin KS, Guenthner AJ, Ghiassi KB, Kelkar AD, Alston JR. Quantification of hexagonal boron nitride impurities in boron nitride nanotubes via FTIR spectroscopy. NANOSCALE ADVANCES 2019; 1:1693-1701. [PMID: 36134222 PMCID: PMC9419701 DOI: 10.1039/c8na00251g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 02/26/2019] [Indexed: 05/09/2023]
Abstract
Preparation of high-quality boron nitride nanotubes (BNNTs) from commercially available stock is critical for eventual industry adoption and to perform comprehensive experimental studies of BNNTs. Separation of hexagonal boron nitride (h-BN) and BNNTs is a significant challenge, and equally so, quantification of h-BN content in mixed samples is a major challenge due to their nearly identical properties. This work introduces a simple method of quantifying h-BN content in BNNTs based on FTIR analysis. Quantification is achieved by "spiking" a BNNT sample with pure nanoscale h-BN as an internal standard. To demonstrate the efficacy of the quantification technique two BNNT enrichment methods, surfactant wrapping and centrifugation, and a novel sonication-assisted isovolumetric filtration are introduced. FTIR spectra of enriched samples show clear trends throughout the processes. We propose and demonstrate that FTIR peak ratios of the transverse and buckling modes of mixed h-BN/BNNT samples can be used to calibrate and quantify h-BN content in any BNNT sample. Hopefully, this method enables as-received BNNTs to be quantifiably enriched from low purity commercial feedstocks, enabling future development and study of BNNTs and related technology.
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Affiliation(s)
- Haley Harrison
- Joint School of Nanoscience and Nanoengineering, University of North Carolina at Greensboro Greensboro NC 27401 USA
| | | | - Kyle S Nowlin
- Joint School of Nanoscience and Nanoengineering, North Carolina A&T State University Greensboro NC 27401 USA +1-336-285-2861
| | - Andrew J Guenthner
- Air Force Research Laboratory, Aerospace Systems Directorate, Edwards AFB CA 93524 USA
| | - Kamran B Ghiassi
- Air Force Research Laboratory, Aerospace Systems Directorate, Edwards AFB CA 93524 USA
| | - Ajit D Kelkar
- Joint School of Nanoscience and Nanoengineering, North Carolina A&T State University Greensboro NC 27401 USA +1-336-285-2861
| | - Jeffrey R Alston
- Joint School of Nanoscience and Nanoengineering, North Carolina A&T State University Greensboro NC 27401 USA +1-336-285-2861
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15
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Qin J, Wang X, Jiang Q, Cao M. Optimizing Dispersion, Exfoliation, Synthesis, and Device Fabrication of Inorganic Nanomaterials Using Hansen Solubility Parameters. Chemphyschem 2019; 20:1069-1097. [DOI: 10.1002/cphc.201900110] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/18/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Jinwen Qin
- Key Laboratory of Cluster Science, Ministry of Education of China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing 100081 P. R. China
| | - Xin Wang
- Key Laboratory of Cluster Science, Ministry of Education of China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing 100081 P. R. China
| | - Qiwang Jiang
- Key Laboratory of Cluster Science, Ministry of Education of China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing 100081 P. R. China
| | - Minhua Cao
- Key Laboratory of Cluster Science, Ministry of Education of China Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials School of Chemistry and Chemical EngineeringBeijing Institute of Technology Beijing 100081 P. R. China
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16
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Smith McWilliams AD, de Los Reyes CA, Liberman L, Ergülen S, Talmon Y, Pasquali M, Martí AA. Surfactant-assisted individualization and dispersion of boron nitride nanotubes. NANOSCALE ADVANCES 2019; 1:1096-1103. [PMID: 36133196 PMCID: PMC9473271 DOI: 10.1039/c8na00315g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 12/05/2018] [Indexed: 05/26/2023]
Abstract
Boron nitride nanotubes (BNNTs) belong to a novel class of material with useful thermal, electronic and optical properties. However, the study and the development of applications of this material requires the formation of stable dispersions of individual BNNTs in water. Here we address the dispersion of BNNT material in water using surfactants with varying properties. The surfactants were compared based on the quantity of BNNTs dispersed and the quality of the dispersions, as visualized by AFM and cryo-TEM. All surfactants produce dispersions of individualized or small bundles of BNNTs. Of the surfactants tested, high molecular weight, nonionic surfactants suspend the most BNNTs, while ionic surfactants remove the most h-BN impurities. The surfactant dispersions were further characterized by ensemble measurements, such as UV absorption and photoluminescence, dynamic light scattering (DLS), and zeta potential to investigate dispersion stability and quality. These techniques provide a facile strategy for testing future BNNT dispersions. The results of this study reveal that BNNT dispersions in aqueous solution can be tuned to fit a specific application through surfactant selection.
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Affiliation(s)
| | | | - Lucy Liberman
- Department of Chemical Engineering, Russell Berrie Nanotechnology Institute (RBNI), Technion - Israel Institute of Technology Haifa 3200003 Israel
| | - Selin Ergülen
- Department of Chemistry, Rice University Houston Texas 77005 USA
| | - Yeshayahu Talmon
- Department of Chemical Engineering, Russell Berrie Nanotechnology Institute (RBNI), Technion - Israel Institute of Technology Haifa 3200003 Israel
| | - Matteo Pasquali
- Department of Chemistry, Rice University Houston Texas 77005 USA
- Department of Chemical and Biomolecular Engineering, Rice University Houston Texas 77005 USA
- Department of Materials Science and Nanoengineering, Rice University Houston Texas 77005 USA
- Smalley-Curl Institute for Nanoscale Science and Technology, Rice University Houston Texas 77005 USA
| | - Angel A Martí
- Department of Chemistry, Rice University Houston Texas 77005 USA
- Department of Bioengineering, Rice University Houston Texas 77005 USA
- Smalley-Curl Institute for Nanoscale Science and Technology, Rice University Houston Texas 77005 USA
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17
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Guan J, Kim KS, Jakubinek MB, Simard B. pH-Switchable Water-Soluble Boron Nitride Nanotubes. ChemistrySelect 2018. [DOI: 10.1002/slct.201801544] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jingwen Guan
- Security and Disruptive Technologies Research Centre; National Research Council Canada, 100 Sussex Dr., Ottawa, ON, K1A 0R6; Canada
| | - Keun Su Kim
- Security and Disruptive Technologies Research Centre; National Research Council Canada, 100 Sussex Dr., Ottawa, ON, K1A 0R6; Canada
| | - Michael B. Jakubinek
- Security and Disruptive Technologies Research Centre; National Research Council Canada, 100 Sussex Dr., Ottawa, ON, K1A 0R6; Canada
| | - Benoit Simard
- Security and Disruptive Technologies Research Centre; National Research Council Canada, 100 Sussex Dr., Ottawa, ON, K1A 0R6; Canada
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18
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High-performance, recyclable ultrafiltration membranes from P4VP-assisted dispersion of flame-resistive boron nitride nanotubes. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.01.030] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Degrazia FW, Leitune VCB, Visioli F, Samuel SMW, Collares FM. Long-term stability of dental adhesive incorporated by boron nitride nanotubes. Dent Mater 2018; 34:427-433. [DOI: 10.1016/j.dental.2017.11.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Revised: 10/29/2017] [Accepted: 11/24/2017] [Indexed: 12/12/2022]
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20
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Kleinerman O, Adnan M, Marincel DM, Ma AWK, Bengio EA, Park C, Chu SH, Pasquali M, Talmon Y. Dissolution and Characterization of Boron Nitride Nanotubes in Superacid. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14340-14346. [PMID: 29166030 DOI: 10.1021/acs.langmuir.7b03461] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Boron nitride nanotubes (BNNTs) are of interest for their unique combination of high tensile strength, high electrical resistivity, high neutron cross section, and low reactivity. The fastest route to employing these properties in composites and macroscopic articles is through solution processing. However, dispersing BNNTs without functionalization or use of a surfactant is challenging. We show here by cryogenic transmission electron microscopy that BNNTs spontaneously dissolve in chlorosulfonic acid as disentangled individual molecules. Electron energy loss spectroscopy of BNNTs dried from the solution confirms preservation of the sp2 hybridization for boron and nitrogen, eliminating the possibility of BNNT functionalization or damage. The length and diameter of the BNNTs was statistically calculated to be ∼4.5 μm and ∼4 nm, respectively. Interestingly, bent or otherwise damaged BNNTs are filled by chlorosulfonic acid. Additionally, nanometer-sized synthesis byproducts, including boron nitride clusters, isolated single and multilayer hexagonal boron nitride, and boron particles, were identified. Dissolution in superacid provides a route for solution processing BNNTs without altering their chemical structure.
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Affiliation(s)
- Olga Kleinerman
- Department of Chemical Engineering, Technion-Israel Institute of Technology and the Russell Berrie Nanotechnology Institute (RBNI) , Haifa 3200003, Israel
| | - Mohammed Adnan
- Department of Chemical and Biomolecular Engineering and Department of Chemistry, The Smalley-Curl Institute, Rice University , Houston, Texas 77005, United States
| | - Daniel M Marincel
- Department of Chemical and Biomolecular Engineering and Department of Chemistry, The Smalley-Curl Institute, Rice University , Houston, Texas 77005, United States
| | - Anson W K Ma
- Department of Chemical and Biomolecular Engineering and Department of Chemistry, The Smalley-Curl Institute, Rice University , Houston, Texas 77005, United States
| | - E Amram Bengio
- Department of Chemical Engineering, Technion-Israel Institute of Technology and the Russell Berrie Nanotechnology Institute (RBNI) , Haifa 3200003, Israel
- Department of Chemical and Biomolecular Engineering and Department of Chemistry, The Smalley-Curl Institute, Rice University , Houston, Texas 77005, United States
| | - Cheol Park
- Advanced Materials and Processing Branch, NASA Langley Research Center , Hampton, Virginia 23681, United States
| | - Sang-Hyon Chu
- National Institute of Aerospace , 100 Exploration Way, Hampton, Virginia 23666, United States
| | - Matteo Pasquali
- Department of Chemical and Biomolecular Engineering and Department of Chemistry, The Smalley-Curl Institute, Rice University , Houston, Texas 77005, United States
| | - Yeshayahu Talmon
- Department of Chemical Engineering, Technion-Israel Institute of Technology and the Russell Berrie Nanotechnology Institute (RBNI) , Haifa 3200003, Israel
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21
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Gilshteyn EP, Amanbayev D, Anisimov AS, Kallio T, Nasibulin AG. All-nanotube stretchable supercapacitor with low equivalent series resistance. Sci Rep 2017; 7:17449. [PMID: 29234105 PMCID: PMC5727201 DOI: 10.1038/s41598-017-17801-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Accepted: 11/30/2017] [Indexed: 11/20/2022] Open
Abstract
We report high-performance, stable, low equivalent series resistance all-nanotube stretchable supercapacitor based on single-walled carbon nanotube film electrodes and a boron nitride nanotube separator. A layer of boron nitride nanotubes, fabricated by airbrushing from isopropanol dispersion, allows avoiding problem of high internal resistance and short-circuiting of supercapacitors. The device, fabricated in a two-electrode test cell configuration, demonstrates electrochemical double layer capacitance mechanism and retains 96% of its initial capacitance after 20 000 electrochemical charging/discharging cycles with the specific capacitance value of 82 F g−1 and low equivalent series resistance of 4.6 Ω. The stretchable supercapacitor prototype withstands at least 1000 cycles of 50% strain with a slight increase in the volumetric capacitance from 0.4 to 0.5 mF cm−3 and volumetric power density from 32 mW cm−3 to 40 mW cm−3 after stretching, which is higher than reported before. Moreover, a low resistance of 250 Ω for the as-fabricated stretchable prototype was obtained, which slightly decreased with the strain applied up to 200 Ω. Simple fabrication process of such devices can be easily extended making the all-nanotube stretchable supercapacitors, presented here, promising elements in future wearable devices.
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Affiliation(s)
- Evgenia P Gilshteyn
- Skolkovo Institute of Science and Technology, Laboratory of Nanomaterials, Nobel str. 3, Skolkovo, Moscow, 143025, Russia
| | - Daler Amanbayev
- Skolkovo Institute of Science and Technology, Laboratory of Nanomaterials, Nobel str. 3, Skolkovo, Moscow, 143025, Russia
| | | | - Tanja Kallio
- Research Group of Electrochemical Energy Conversion and Storage, Department of Chemistry and Material Science, School of Chemical Engeneering, Aalto University, P.O. Box 16100, FI-00076, Aalto, Finland
| | - Albert G Nasibulin
- Skolkovo Institute of Science and Technology, Laboratory of Nanomaterials, Nobel str. 3, Skolkovo, Moscow, 143025, Russia. .,Department of Applied Physics, School of Science, Aalto University, P.O. Box 15100, FI-00076, Aalto, Finland.
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22
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Chejanovsky N, Kim Y, Zappe A, Stuhlhofer B, Taniguchi T, Watanabe K, Dasari D, Finkler A, Smet JH, Wrachtrup J. Quantum Light in Curved Low Dimensional Hexagonal Boron Nitride Systems. Sci Rep 2017; 7:14758. [PMID: 29116207 PMCID: PMC5676806 DOI: 10.1038/s41598-017-15398-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 10/26/2017] [Indexed: 01/17/2023] Open
Abstract
Low-dimensional wide bandgap semiconductors open a new playing field in quantum optics using sub-bandgap excitation. In this field, hexagonal boron nitride (h-BN) has been reported to host single quantum emitters (QEs), linking QE density to perimeters. Furthermore, curvature/perimeters in transition metal dichalcogenides (TMDCs) have demonstrated a key role in QE formation. We investigate a curvature-abundant BN system - quasi one-dimensional BN nanotubes (BNNTs) fabricated via a catalyst-free method. We find that non-treated BNNT is an abundant source of stable QEs and analyze their emission features down to single nanotubes, comparing dispersed/suspended material. Combining high spatial resolution of a scanning electron microscope, we categorize and pin-point emission origin to a scale of less than 20 nm, giving us a one-to-one validation of emission source with dimensions smaller than the laser excitation wavelength, elucidating nano-antenna effects. Two emission origins emerge: hybrid/entwined BNNT. By artificially curving h-BN flakes, similar QE spectral features are observed. The impact on emission of solvents used in commercial products and curved regions is also demonstrated. The 'out of the box' availability of QEs in BNNT, lacking processing contamination, is a milestone for unraveling their atomic features. These findings open possibilities for precision engineering of QEs, puts h-BN under a similar 'umbrella' of TMDC's QEs and provides a model explaining QEs spatial localization/formation using electron/ion irradiation and chemical etching.
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Affiliation(s)
- Nathan Chejanovsky
- Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569, Stuttgart, Germany
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - Youngwook Kim
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - Andrea Zappe
- Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569, Stuttgart, Germany
| | - Benjamin Stuhlhofer
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - Takashi Taniguchi
- National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
| | - Kenji Watanabe
- National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
| | - Durga Dasari
- Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569, Stuttgart, Germany
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - Amit Finkler
- Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569, Stuttgart, Germany.
| | - Jurgen H Smet
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
| | - Jörg Wrachtrup
- Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569, Stuttgart, Germany
- Max Planck Institute for Solid State Research, Heisenbergstr. 1, 70569, Stuttgart, Germany
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23
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Development of a simple technique for the coating of monolithic silica with pristine boron nitride nanotubes (BNNTs): HPLC chromatographic applications. Talanta 2017; 164:39-44. [DOI: 10.1016/j.talanta.2016.10.105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 10/11/2016] [Accepted: 10/15/2016] [Indexed: 11/23/2022]
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24
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Cao X, Li C, Li Y, Fang F, Cui X, Yao Y, Wei J. Enhanced performance of perovskite solar cells by modulating the Lewis acid-base reaction. NANOSCALE 2016; 8:19804-19810. [PMID: 27874130 DOI: 10.1039/c6nr07450b] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The Lewis acid-base reaction between PbI2 and solvent molecules is popular in fabricating PbI2 films by a two-step method for making perovskite solar cells. Here, we control the microstructure of PbI2 films through modulating the Lewis acid-base reaction by adding a small amount of N-methyl pyrrolidone into PbI2/DMF solution. PbI2 films with excellent crystallinity and full coverage are fabricated by spin-coating the mixed solution on the substrate, which leads to high quality perovskite layers with low recombination rate and high efficiency for carrier transfer. As a result, the power conversion efficiency of the best perovskite solar cells increases from 13.3% to 17.5%.
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Affiliation(s)
- Xiaobing Cao
- Key Lab for Advanced Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P.R. China.
| | - Changli Li
- Key Lab for Advanced Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P.R. China.
| | - Yahui Li
- Key Lab for Advanced Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P.R. China.
| | - Fei Fang
- Key Lab for Advanced Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P.R. China. and Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, P.R. China
| | - Xian Cui
- Key Lab for Advanced Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P.R. China.
| | - Youwei Yao
- Institute of Advanced Materials, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, P.R. China
| | - Jinquan Wei
- Key Lab for Advanced Materials Processing Technology of Education Ministry, State Key Lab of New Ceramic and Fine Processing, School of Materials Science and Engineering, Tsinghua University, Beijing 100084, P.R. China.
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25
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Habib T, Sundaravadivelu Devarajan D, Khabaz F, Parviz D, Achee TC, Khare R, Green MJ. Cosolvents as Liquid Surfactants for Boron Nitride Nanosheet (BNNS) Dispersions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:11591-11599. [PMID: 27740775 DOI: 10.1021/acs.langmuir.6b02611] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Despite a range of promising applications, liquid-phase exfoliation of boron nitride nanosheets (BNNSs) is limited, both by low yield in common solvents as well as the disadvantages of using dissolved surfactants. One recently reported approach is the use of cosolvent systems to increase the as-obtained concentration of BNNS; the role of these solvents in aiding exfoliation and/or aiding colloidal stability of BNNSs is difficult to distinguish. In this paper, we have investigated the use of a t-butanol/water cosolvent to disperse BNNSs. We utilize solvent-exchange experiments to demonstrate that the t-butanol is in fact essential to colloidal stability; we then utilized molecular dynamics simulations to explore the mechanism of t-butanol/BNNS interactions. Taken together, the experimental and simulation results show that the key to the success of t-butanol (as compared to the other alcohols of higher or lower molecular weight) lies in its ability to act as a "liquid dispersant" which allows it to favorably interact with both water and BNNSs. Additionally, we show that the stable dispersions of BNNS in water/t-butanol systems may be freeze-dried to yield nonaggregated, redispersible BNNS powders, which would be useful in an array of industrial processes.
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Affiliation(s)
- Touseef Habib
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | | | - Fardin Khabaz
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
| | - Dorsa Parviz
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Thomas C Achee
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
| | - Rajesh Khare
- Department of Chemical Engineering, Texas Tech University , Lubbock, Texas 79409, United States
| | - Micah J Green
- Artie McFerrin Department of Chemical Engineering, Texas A&M University , College Station, Texas 77843, United States
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26
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The interaction between Boron-carbon-nitride heteronanotubes and lithium atoms: Role of composition proportion. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.06.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Bonaccorso F, Bartolotta A, Coleman JN, Backes C. 2D-Crystal-Based Functional Inks. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:6136-66. [PMID: 27273554 DOI: 10.1002/adma.201506410] [Citation(s) in RCA: 167] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 03/09/2016] [Indexed: 05/19/2023]
Abstract
The possibility to produce and process graphene, related 2D crystals, and heterostructures in the liquid phase makes them promising materials for an ever-growing class of applications as composite materials, sensors, in flexible optoelectronics, and energy storage and conversion. In particular, the ability to formulate functional inks with on-demand rheological and morphological properties, i.e., lateral size and thickness of the dispersed 2D crystals, is a step forward toward the development of industrial-scale, reliable, inexpensive printing/coating processes, a boost for the full exploitation of such nanomaterials. Here, the exfoliation strategies of graphite and other layered crystals are reviewed, along with the advances in the sorting of lateral size and thickness of the exfoliated sheets together with the formulation of functional inks and the current development of printing/coating processes of interest for the realization of 2D-crystal-based devices.
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Affiliation(s)
- Francesco Bonaccorso
- Istituto Italiano di Tecnologia, Graphene Labs, Via Morego 30, Genova, 16163, Italy
| | - Antonino Bartolotta
- CNR-IPCF, Istituto per i Processi Chimico-Fisici, Via F. Stagno D'Alcontres 37, Messina, 98158, Italy
| | - Jonathan N Coleman
- School of Physics and CRANN, Trinity College Dublin, Pearse St, Dublin 2, Ireland
| | - Claudia Backes
- Applied Physical Chemistry, University of Heidelberg, Im Neuenheimer Feld 253, Heidelberg, 69120, Germany
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28
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Boron Nitride Nanotubes: Recent Advances in Their Synthesis, Functionalization, and Applications. Molecules 2016; 21:molecules21070922. [PMID: 27428947 PMCID: PMC6272975 DOI: 10.3390/molecules21070922] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 07/06/2016] [Accepted: 07/11/2016] [Indexed: 02/07/2023] Open
Abstract
A comprehensive overview of current research progress on boron nitride nanotubes (BNNTs) is presented in this article. Particularly, recent advancements in controlled synthesis and large-scale production of BNNTs will first be summarized. While recent success in mass production of BNNTs has opened up new opportunities to implement the appealing properties in various applications, concerns about product purity and quality still remain. Secondly, we will summarize the progress in functionalization of BNNTs, which is the necessary step for their applications. Additionally, selected potential applications in structural composites and biomedicine will be highlighted.
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