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Kumar S, Damle VH, Bendikov T, Itzhak A, Elbaum M, Rechav K, Houben L, Tischler Y, Cahen D. Topotactic, Vapor-Phase, In Situ Monitored Formation of Ultrathin, Phase-Pure 2D-on-3D Halide Perovskite Surfaces. ACS Appl Mater Interfaces 2023; 15:23908-23921. [PMID: 37133217 DOI: 10.1021/acsami.3c01881] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Two-dimensional (2D) halide perovskites, HaPs, can provide chemical stability to three-dimensional (3D) HaP surfaces, protecting them from exposure to ambient species and from reacting with contacting layers. Both actions occur with 2D HaPs, with the general stoichiometry R2PbI4 (R: long or bulky organic amine) covering the 3D ones. Adding such covering films can also boost power conversion efficiencies of photovoltaic cells by passivating surface/interface trap states. For maximum benefit, we need conformal ultrathin and phase-pure (n = 1) 2D layers to enable efficient tunneling of photogenerated charge carriers through the 2D film barrier. Conformal coverage of ultrathin (<10 nm) R2PbI4 layers on 3D perovskites is challenging with spin coating; even more so is its upscaling for larger-area devices. We report on vapor-phase cation exchange of the 3D surface with the R2PbI4 molecules and real-time in situ growth monitoring by photoluminescence (PL) to determine limits for forming ultrathin 2D layers. We characterize the 2D growth stages, following the changing PL intensity-time profiles, by combining structural, optical, morphological, and compositional characterizations. Moreover, from quantitative X-ray photoelectron spectroscopy (XPS) analysis on 2D/3D bilayer films, we estimate the smallest width of a 2D cover that we can grow to be <5 nm, roughly the limit for efficient tunneling through a (semi)conjugated organic barrier. We also find that, besides protecting the 3D against ambient humidity-induced degradation, the ultrathin 2D-on-3D film also aids self-repair following photodamage.
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Affiliation(s)
- Sujit Kumar
- Dept. of Mol. Chem. & Mater. Science, Weizmann Inst. of Science, Rehovot 7610001, Israel
- Bar-Ilan Inst. for Adv. Mater. & Nanotech. & Dept. of Chem., Bar-Ilan Univ., Ramat Gan 5290002, Israel
| | - Vinayaka H Damle
- Bar-Ilan Inst. for Adv. Mater. & Nanotech. & Dept. of Chem., Bar-Ilan Univ., Ramat Gan 5290002, Israel
| | - Tatyana Bendikov
- Dept. of Chem. Research Support, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Anat Itzhak
- Bar-Ilan Inst. for Adv. Mater. & Nanotech. & Dept. of Chem., Bar-Ilan Univ., Ramat Gan 5290002, Israel
| | - Michael Elbaum
- Dept. of Chem. Biol. Physics, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Katya Rechav
- Dept. of Chem. Research Support, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Lothar Houben
- Dept. of Chem. Research Support, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Yaakov Tischler
- Bar-Ilan Inst. for Adv. Mater. & Nanotech. & Dept. of Chem., Bar-Ilan Univ., Ramat Gan 5290002, Israel
| | - David Cahen
- Dept. of Mol. Chem. & Mater. Science, Weizmann Inst. of Science, Rehovot 7610001, Israel
- Bar-Ilan Inst. for Adv. Mater. & Nanotech. & Dept. of Chem., Bar-Ilan Univ., Ramat Gan 5290002, Israel
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Vinay Pradeep V, Tardío C, Torres-Moya I, Rodríguez AM, Vinod Kumar A, Annadhasan M, de la Hoz A, Prieto P, Chandrasekar R. Mechanical Processing of Naturally Bent Organic Crystalline Microoptical Waveguides and Junctions. Small 2021; 17:e2006795. [PMID: 33354900 DOI: 10.1002/smll.202006795] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2020] [Revised: 12/07/2020] [Indexed: 06/12/2023]
Abstract
Precise mechanical processing of optical microcrystals involves complex microscale operations viz. moving, bending, lifting, and cutting of crystals. Some of these mechanical operations can be implemented by applying mechanical force at specific points of the crystal to fabricate advanced crystalline optical junctions. Mechanically compliant flexible optical crystals are ideal candidates for the designing of such microoptical junctions. A vapor-phase growth of naturally bent optical waveguiding crystals of 1,4-bis(2-cyanophenylethynyl)benzene (1) on a surface forming different optical junctions is presented. In the solid-state, molecule 1 interacts with its neighbors via CH⋅⋅⋅N hydrogen bonding and π-π stacking. The microcrystals deposited at a glass surface exhibit moderate flexibility due to substantial surface adherence energy. The obtained network crystals also display mechanical compliance when cut precisely with sharp atomic force microscope cantilever tip, making them ideal candidates for building innovative T- and Δ-shaped optical junctions with multiple outputs. The presented micromechanical processing technique can also be effectively used as a tool to fabricate single-crystal integrated photonic devices and circuits on suitable substrates.
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Affiliation(s)
- Vuppu Vinay Pradeep
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 50046, India
- Centre for Nanotechnology, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 50046, India
| | - Carlos Tardío
- Department of Biochemistry, Organic and Inorganic Chemistry, Faculty of Chemical and Technologies Sciences, University of Castilla- La Mancha, Ciudad Real, 13071, Spain
| | - Iván Torres-Moya
- Department of Biochemistry, Organic and Inorganic Chemistry, Faculty of Chemical and Technologies Sciences, University of Castilla- La Mancha, Ciudad Real, 13071, Spain
| | - Ana M Rodríguez
- Department of Biochemistry, Organic and Inorganic Chemistry, Faculty of Chemical and Technologies Sciences, University of Castilla- La Mancha, Ciudad Real, 13071, Spain
| | - Avulu Vinod Kumar
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 50046, India
- Centre for Nanotechnology, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 50046, India
| | - Mari Annadhasan
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 50046, India
- Centre for Nanotechnology, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 50046, India
| | - Antonio de la Hoz
- Department of Biochemistry, Organic and Inorganic Chemistry, Faculty of Chemical and Technologies Sciences, University of Castilla- La Mancha, Ciudad Real, 13071, Spain
| | - Pilar Prieto
- Department of Biochemistry, Organic and Inorganic Chemistry, Faculty of Chemical and Technologies Sciences, University of Castilla- La Mancha, Ciudad Real, 13071, Spain
| | - Rajadurai Chandrasekar
- School of Chemistry, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 50046, India
- Centre for Nanotechnology, University of Hyderabad, Prof. C. R. Rao Road, Gachibowli, Hyderabad, 50046, India
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Wang L, Jia D, Yue L, Zheng K, Zhang A, Jia Q, Liu J. In Situ Fabrication of a Uniform Co-MOF Shell Coordinated with CoNiO 2 to Enhance the Energy Storage Capability of NiCo-LDH via Vapor-Phase Growth. ACS Appl Mater Interfaces 2020; 12:47526-47538. [PMID: 32946221 DOI: 10.1021/acsami.0c12759] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
NiCo-layered double hydroxide (LDH) has attracted increasing attention in recent years for application in supercapacitors (SCs) owing to its high redox activity and intercalating capability. However, the pristine NiCo-LDH is unable to reach theoretical specific capacitance and satisfying rate capability due to the limited electroactive species and a low ion diffusion rate. Here, we demonstrate novel vertically aligned nanosheet arrays of cobalt metal-organic framework (Co-MOF)@CoNiO2 core-shell composites constructed by the in situ grown Co-MOF shell with a uniform and controlled thickness on the CoNiO2 core via a vapor-phase approach. Owing to the intimate contact and synergistic effect between the Co-MOF shell and the CoNiO2 core, the as-synthesized Co-MOF@CoNiO2 displays a high specific capacitance of about 571 F g-1, which is significantly higher than the pristine NiCo-LDH electrode (380 F g-1). Moreover, the capacitive properties of Co-MOF@CoNiO2 can be further boosted to 757.2 F g-1 after cyclic voltammetry oxidation. The easy preparation and high electrochemical performance of the Co-MOF@CoNiO2 composite make it a potential material for SC application. These findings may inspire the exploration and construction of other MOF shell coating metal oxide from various nanostructured LDHs for varied applications. In addition, the as-assembled EO-Co-MOF@CoNiO2/carbon cloth (CC)//activated carbon (AC) device can achieve a high capacitance of 87.67 F g-1. Meanwhile, the asymmetric supercapacitor (ASC) device exhibits a high energy density of 27.4 Wh kg-1 at a power density of 750 W kg-1.
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Affiliation(s)
- Lihua Wang
- College of Material Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Dedong Jia
- College of Material Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Lijun Yue
- College of Material Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Kun Zheng
- College of Material Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Aitang Zhang
- College of Material Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Qiang Jia
- College of Material Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China
| | - Jingquan Liu
- College of Material Science and Engineering, Qingdao University, Qingdao 266071, Shandong, China
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Kim SY, Kwak J, Ciobanu CV, Kwon SY. Recent Developments in Controlled Vapor-Phase Growth of 2D Group 6 Transition Metal Dichalcogenides. Adv Mater 2019; 31:e1804939. [PMID: 30706541 DOI: 10.1002/adma.201804939] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 09/20/2018] [Indexed: 06/09/2023]
Abstract
An overview of recent developments in controlled vapor-phase growth of 2D transition metal dichalcogenide (2D TMD) films is presented. Investigations of thin-film formation mechanisms and strategies for realizing 2D TMD films with less-defective large domains are of central importance because single-crystal-like 2D TMDs exhibit the most beneficial electronic and optoelectronic properties. The focus is on the role of the various growth parameters, including strategies for efficiently delivering the precursors, the selection and preparation of the substrate surface as a growth assistant, and the introduction of growth promoters (e.g., organic molecules and alkali metal halides) to facilitate the layered growth of (Mo, W)(S, Se, Te)2 atomic crystals on inert substrates. Critical factors governing the thermodynamic and kinetic factors related to chemical reaction pathways and the growth mechanism are reviewed. With modification of classical nucleation theory, strategies for designing and growing various vertical/lateral TMD-based heterostructures are discussed. Then, several pioneering techniques for facile observation of structural defects in TMDs, which substantially degrade the properties of macroscale TMDs, are introduced. Technical challenges to be overcome and future research directions in the vapor-phase growth of 2D TMDs for heterojunction devices are discussed in light of recent advances in the field.
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Affiliation(s)
- Se-Yang Kim
- School of Materials Science and Engineering & Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jinsung Kwak
- School of Materials Science and Engineering & Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Cristian V Ciobanu
- Department of Mechanical Engineering & Materials Science Program, Colorado School of Mines, CO, 80401, USA
| | - Soon-Yong Kwon
- School of Materials Science and Engineering & Low-Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
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Tian C, Sheng W, Tan H, Jiang H, Xiong C. Fabrication of Lattice-Doped TiO 2 Nanofibers by Vapor-Phase Growth for Visible Light-Driven N 2 Conversion to Ammonia. ACS Appl Mater Interfaces 2018; 10:37453-37460. [PMID: 30345747 DOI: 10.1021/acsami.8b15174] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In the past decades, enormous efforts have been made to synthesize photocatalysts for N2 conversion driven by visible light. However, it is still a major challenge to develop an efficient photocatalyst. In this paper, monodoped and codoped TiO2 nanofibers were fabricated by vapor-phase growth. Vapor-phase implantation of the guest atoms into TiO2 nanofibers may greatly prolong the lifetime of electron-hole pairs. The doped TiO2 nanofibers were demonstrated to be an excellent photocatalyst for nitrogen photofixation under a 300 W Xe-lamp irradiation. The amount of ammonia produced over the Fe, V codoped TiO2 nanofibers reached 14 783 μmol/L·g-cata after irradiation for 2 h. The strategy could be easily extended to prepare other species doped TiO2 nanofibers as high-efficiency photocatalysts.
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Affiliation(s)
- Changshui Tian
- State Key Laboratory of Marine Resource Utilization in South China Sea, Special Glass Key Lab of Hainan Province , Hainan University , Haikou 570228 , P. R. China
| | - Wenlong Sheng
- State Key Laboratory of Marine Resource Utilization in South China Sea, Special Glass Key Lab of Hainan Province , Hainan University , Haikou 570228 , P. R. China
| | - Heng Tan
- State Key Laboratory of Marine Resource Utilization in South China Sea, Special Glass Key Lab of Hainan Province , Hainan University , Haikou 570228 , P. R. China
| | - Hong Jiang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Special Glass Key Lab of Hainan Province , Hainan University , Haikou 570228 , P. R. China
| | - Chunrong Xiong
- State Key Laboratory of Marine Resource Utilization in South China Sea, Special Glass Key Lab of Hainan Province , Hainan University , Haikou 570228 , P. R. China
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Zhou H, Yuan S, Wang X, Xu T, Wang X, Li H, Zheng W, Fan P, Li Y, Sun L, Pan A. Vapor Growth and Tunable Lasing of Band Gap Engineered Cesium Lead Halide Perovskite Micro/Nanorods with Triangular Cross Section. ACS Nano 2017; 11:1189-1195. [PMID: 28035809 DOI: 10.1021/acsnano.6b07374] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Although great efforts have been devoted to the synthesis of halide perovskites nanostructures, vapor growth of high-quality one-dimensional cesium lead halide nanostructures for tunable nanoscale lasers is still a challenge. Here, we report the growth of high-quality all-inorganic cesium lead halide alloy perovskite micro/nanorods with complete composition tuning by vapor-phase deposition. The as-grown micro/nanorods are single-crystalline with a triangular cross section and show strong photoluminescence which can be tuned from 415 to 673 nm by varying the halide composition. Furthermore, these single-crystalline perovskite micro/nanorods themselves function as effective Fabry-Perot cavities for nanoscale lasers. We have realized room-temperature tunable lasing of cesium lead halide perovskite with low lasing thresholds (∼14.1 μJ cm-2) and high Q factors (∼3500).
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Affiliation(s)
- Hong Zhou
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
| | - Shuangping Yuan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
| | - Xiaoxia Wang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
| | - Tao Xu
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University , Nanjing 210096, P. R. China
| | - Xiao Wang
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
| | - Honglai Li
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
| | - Weihao Zheng
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
| | - Peng Fan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
| | - Yunyun Li
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
| | - Litao Sun
- SEU-FEI Nano-Pico Center, Key Lab of MEMS of Ministry of Education, Southeast University , Nanjing 210096, P. R. China
| | - Anlian Pan
- Key Laboratory for Micro-Nano Physics and Technology of Hunan Province, State Key Laboratory of Chemo/Biosensing and Chemometrics, and School of Physics and Electronics, Hunan University , Changsha 410082, P. R. China
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