1
|
Lee J, Lee H, Kim C, Nguyen TTT, Kim Y, Jeong G, Chang M, Yun C, Yoon H. Controlled Growth of Perovskite Nanocrystals on Nanotubes via a Nanoseeding Intermediate Stage: Toward Novel Optoelectronic Applications. J Phys Chem Lett 2023; 14:8837-8845. [PMID: 37751387 DOI: 10.1021/acs.jpclett.3c02391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
CsPbBr3 perovskite nanocrystals (CNCs) were densely anchored on multiwalled carbon nanotubes (MWNTs) via a nanoseeding intermediate stage, in which lead-based nuclei are formed on the nanotube surface. After the formation of the intermediate, a cesium precursor was added to promote the growth of CNCs from the surface nuclei and to thereby obtain CNC-decorated MWNT nanohybrids (CMNHs). The morphology and properties of the CMNHs were determined by the reaction temperature employed during their synthesis. Importantly, the use of MWNTs promoted the formation of larger CNCs that emitted intense green light and modified the electronic structure and bandgap energy of the CNCs. Consequently, the CMNHs could function as optoelectronic transducers and exhibit a "turn-on" photocurrent response when exposed to UV light of narrow specific-range wavelengths. In a novel approach for preventing counterfeit products, the CMNHs were used as a light-emitting black ink to create quick-response codes with fake pixels.
Collapse
Affiliation(s)
- Jisun Lee
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| | - Haney Lee
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| | - Changjun Kim
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| | - Thi Thuong Thuong Nguyen
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| | - Yejin Kim
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| | - Ganghoon Jeong
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| | - Mincheol Chang
- School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| | - Changhun Yun
- School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| | - Hyeonseok Yoon
- School of Polymer Science and Engineering, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
- Department of Polymer Engineering, Graduate School, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 61186, South Korea
| |
Collapse
|
2
|
Chu B, Fu B, Dong L, Cheng W, Wang R, Zheng F, Fang C, Tao P, Song C, Shang W, Deng T. A Graphene Quantum Dot Film with a Nanoengineered Crack-Like Surface via Bubble-Induced Self-Assembly for High-Power Thermal Energy Management Applications. NANO LETTERS 2023; 23:259-266. [PMID: 36542060 DOI: 10.1021/acs.nanolett.2c04254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Films with micro/nanostructures that show high wicking performance are promising in water desalination, atmospheric water harvesting, and thermal energy management systems. Here, we use a facile bubble-induced self-assembly method to directly generate films with a nanoengineered crack-like surface on the substrate during bubble growth when self-dispersible graphene quantum dot (GQD) nanofluid is used as the working medium. The crack-like micro/nanostructure, which is generated due to the thermal stress, enables the GQD film to not only have superior capillary wicking performance but also provide many additional nucleation sites. The film demonstrates enhanced phase change-based heat transfer performance, with a simultaneous enhancement of the critical heat flux and heat transfer coefficient up to 169% and 135% over a smooth substrate, respectively. Additionally, the GQD film with high stability enables a performance improvement in the concentration ratio and electrical efficiency of concentrated photovoltaics in an analytical study, which is promising for high-power thermal energy management applications.
Collapse
Affiliation(s)
- Ben Chu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Benwei Fu
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Lining Dong
- Shanghai Institute of Satellite Engineering, Shanghai 200240, People's Republic of China
| | - Weizheng Cheng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Ruitong Wang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Feiyu Zheng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Cheng Fang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Peng Tao
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Chengyi Song
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Wen Shang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| | - Tao Deng
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China
| |
Collapse
|
3
|
Zhang J, Shangguan S, Wang X, Deng H, Qi D, Chen S, Zheng H. Spatially modulated femtosecond laser direct ablation-based preparation of ultra-flexible multifunctional copper mesh electrodes and its application. OPTICS EXPRESS 2022; 30:39996-40008. [PMID: 36298940 DOI: 10.1364/oe.471182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
Multifunctional electrodes possess superior properties such as high photoelectric properties and high stability. Laser manufacturing process is one of the widely used method for electrode fabrication. However, the current multifunctional electrode laser manufacturing process suffers from low fabrication speed. Here, we report a high-efficiency laser digital patterning process to fabricate copper-based flexible transparent conducting electrodes. By using a spatially modulated, one single laser spot is modulated into an array of spots with equal intensity, and the fabrication speed can be improved by more than 20 times over the traditional single pulse processing. In addition, copper mesh electrodes with a high photoelectric property have been fabricated. A transparent touch screen panel and multifunctional windows are fabricated with transparent electrodes to demonstrate their use in vehicle defogging, portable heating, and wearable devices.
Collapse
|
4
|
Wu Y, Zhao X, Shang Y, Chang S, Dai L, Cao A. Application-Driven Carbon Nanotube Functional Materials. ACS NANO 2021; 15:7946-7974. [PMID: 33988980 DOI: 10.1021/acsnano.0c10662] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Carbon nanotube functional materials (CNTFMs) represent an important research field in transforming nanoscience and nanotechnology into practical applications, with potential impact in a wide realm of science, technology, and engineering. In this review, we combine the state-of-the-art research activities of CNTFMs with the application prospect, to highlight critical issues and identify future challenges. We focus on macroscopic long fibers, thin films, and bulk sponges which are typical CNTFMs in different dimensions with distinct characteristics, and also cover a variety of derived composite/hierarchical materials. Critical issues related to their structures, properties, and applications as robust conductive skeletons or high-performance flexible electrodes in mechanical and electronic devices, advanced energy conversion and storage systems, and environmental areas have been discussed specifically. Finally, possible solutions and directions are proposed for overcoming current obstacles and promoting future efforts in the field.
Collapse
Affiliation(s)
- Yizeng Wu
- School of Materials Science and Engineering, Peking University, Beijing 100871, People's Republic of China
| | - Xuewei Zhao
- School of Materials Science and Engineering, Peking University, Beijing 100871, People's Republic of China
| | - Yuanyuan Shang
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Shulong Chang
- School of Physics and Microelectronics, Zhengzhou University, Zhengzhou, Henan 450001, People's Republic of China
| | - Linxiu Dai
- School of Materials Science and Engineering, Peking University, Beijing 100871, People's Republic of China
| | - Anyuan Cao
- School of Materials Science and Engineering, Peking University, Beijing 100871, People's Republic of China
| |
Collapse
|
5
|
Jin XZ, Qi XD, Wang Y, Yang JH, Li H, Zhou ZW, Wang Y. Polypyrrole/Helical Carbon Nanotube Composite with Marvelous Photothermoelectric Performance for Longevous and Intelligent Internet of Things Application. ACS APPLIED MATERIALS & INTERFACES 2021; 13:8808-8822. [PMID: 33565860 DOI: 10.1021/acsami.0c22123] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Helical carbon nanotube (HCNT) is a vital member of carbon nanomaterials, but little effort was devoted to explore its unique characteristics and applications during the past few decades. Here, we report an organic thermoelectric composite with an excellent photothermoelectric (PTE) effect by conformally wrapping polypyrrole (PPy) on the intricate surface of HCNTs, which have been confirmed to have remarkable near-infrared (NIR) photothermal conversion capability and ultralow heat transportation characteristics. The results indicate that with the increasing HCNT content, PPy shell thickness reduces and exhibits denser as well as partial orientation, while the inter-ring angle slowly decreases and the bipolaron becomes dominant in carrier composition gradually. Consequently, the Seebeck coefficient increases monotonically, whereas the electrical conductivity remains nearly invariant. The final composite combines the benign thermoelectric properties, excellent photothermal response performance, and the lowest thermal conductivity of the carbon-based thermoelectric composite yet reported (0.064 W m-1 K-1). A single strip NIR light-stimulated adjustable delay switch was designed and fabricated, with the open-circuit voltage and short-circuit current under a 400 mW cm-2 NIR-stimulated approach to 720 μV and 62 nA with the discrepancy of consecutive periodic output signals less than 4.2%, exhibiting incredible stability and reliability and demonstrating the highest output voltage of a single strip among the reported organic PTE composite at room temperature. Our work fills in a gap of HCNT research, which hitherto existed in the PTE and thermoelectric field.
Collapse
Affiliation(s)
- Xin-Zheng Jin
- School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu 610031, China
| | - Xiao-Dong Qi
- School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu 610031, China
| | - Ying Wang
- School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu 610031, China
| | - Jing-Hui Yang
- School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu 610031, China
| | - Hao Li
- School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu 610031, China
| | - Zuo-Wan Zhou
- School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu 610031, China
| | - Yong Wang
- School of Materials Science & Engineering, Key Laboratory of Advanced Technologies of Materials (Ministry of Education), Southwest Jiaotong University, Chengdu 610031, China
| |
Collapse
|
6
|
Kolosov DA, Mitrofanov VV, Slepchenkov MM, Glukhova OE. Thin Graphene-Nanotube Films for Electronic and Photovoltaic Devices: DFTB Modeling. MEMBRANES 2020; 10:membranes10110341. [PMID: 33202838 PMCID: PMC7698213 DOI: 10.3390/membranes10110341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 10/21/2020] [Accepted: 11/11/2020] [Indexed: 06/11/2023]
Abstract
Supercell atomic models of composite films on the basis of graphene and single-wall carbon nanotubes (SWCNTs) with an irregular arrangement of SWCNTs were built. It is revealed that composite films of this type have a semiconducting type of conductivity and are characterized by the presence of an energy gap of 0.43-0.73 eV. It was found that the absorption spectrum of composite films contained specific peaks in a wide range of visible and infrared (IR) wavelengths. On the basis of calculated composite films volt-ampere characteristics (VAC), the dependence of the current flowing through the films on the distance between the nanotubes was identified. For the investigated composites, spectral dependences of the photocurrent were calculated. It was shown that depending on the distance between nanotubes, the maximum photocurrent might shift from the IR to the optical range.
Collapse
Affiliation(s)
- Dmitry A. Kolosov
- Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; (D.A.K.); (V.V.M.); (M.M.S.)
| | - Vadim V. Mitrofanov
- Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; (D.A.K.); (V.V.M.); (M.M.S.)
| | - Michael M. Slepchenkov
- Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; (D.A.K.); (V.V.M.); (M.M.S.)
| | - Olga E. Glukhova
- Department of Physics, Saratov State University, Astrakhanskaya street 83, 410012 Saratov, Russia; (D.A.K.); (V.V.M.); (M.M.S.)
- Laboratory of Biomedical Nanotechnology, I.M. Sechenov First Moscow State Medical University, Trubetskaya street 8-2, 119991 Moscow, Russia
| |
Collapse
|
7
|
Wang M, Zhou L, Hou Y, He W, Liu W, Wu F, Hou X. Dynamic and reversible electrowetting with low voltage on the dimethicone infused carbon nanotube array in air. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2020.04.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
8
|
Chen ZC, Chang TL, Li CH, Su KW, Liu CC. Thermally stable and uniform DNA amplification with picosecond laser ablated graphene rapid thermal cycling device. Biosens Bioelectron 2019; 146:111581. [PMID: 31629228 PMCID: PMC7126615 DOI: 10.1016/j.bios.2019.111581] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 06/02/2019] [Accepted: 08/08/2019] [Indexed: 01/02/2023]
Abstract
Rapid thermal cycling (RTC) in an on-chip device can perform DNA amplification in vitro through precise thermal control at each step of the polymerase chain reaction (PCR). This study reports a straightforward fabrication technique for patterning an on-chip graphene-based device with hole arrays, in which the mechanism of surface structures can achieve stable and uniform thermal control for the amplification of DNA fragments. A thin-film based PCR device was fabricated using picosecond laser (PS-laser) ablation of the multilayer graphene (MLG). Under the optimal fluence of 4.72 J/cm2 with a pulse overlap of 66%, the MLG can be patterned with arrays of 250 μm2 hole surface structures. A 354-bp DNA fragment of VP1, an effective marker for diagnosing the BK virus, was amplified on an on-chip device in less than 60 min. A thin-film electrode with the aforementioned MLG as the heater was demonstrated to significantly enhance temperature stability for each stage of the thermal cycle. The temperature control of the heater was performed by means of a developed programmable PCR apparatus. Our results demonstrated that the proposed integration of a graphene-based device and a laser-pulse ablation process to form a thin-film PCR device has cost benefits in a small-volume reagent and holds great promise for practical medical use of DNA amplification.
Collapse
Affiliation(s)
- Zhao-Chi Chen
- Department of Mechatronic Engineering, National Taiwan Normal University, Taipei, Taiwan, ROC
| | - Tien-Li Chang
- Department of Mechatronic Engineering, National Taiwan Normal University, Taipei, Taiwan, ROC.
| | - Ching-Hao Li
- Department of Physiology, School of Medicine, Graduate Institute of Medical Sciences, College of Medicine, Taipei Medical University, Taipei, Taiwan, ROC
| | - Kai-Wen Su
- Integrated Science, University of British Columbia, Columbia, Canada
| | - Cheng-Che Liu
- Graduate Institute of Physiology, National Defense Medical Center, Taipei, Taiwan, ROC.
| |
Collapse
|
9
|
Ni X, Hui C, Su N, Cutler R, Liu F. A 3D percolation model for multicomponent nanocarbon composites: the critical role of nematic transition. NANOTECHNOLOGY 2019; 30:185302. [PMID: 30673633 DOI: 10.1088/1361-6528/ab012f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A three-dimensional (3D) continuum percolation model has been developed on the basis of Monte Carlo simulation to investigate the percolation behavior of an electrically insulating matrix reinforced with multiple conductive fillers of different dimensionalities. Impenetrable fillers of large aspect ratio are found to preferentially align with each other to maximize the packing entropy rather than forming randomly oriented clusters. This entropy-driven transition from isotropic to nematic phase is shown to critically affect the percolation threshold. It suggests that an isotropic phase with a smaller nematic order parameter leads to a reduction in percolation threshold. In addition, a combination of two fillers with different dimensionalities can achieve a working concentration below the percolation threshold of single component system, which is further validated by the experiments of electrical conductivity in multicomponent multidimensional nanocarbon composites.
Collapse
Affiliation(s)
- Xiaojuan Ni
- Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, United States of America
| | | | | | | | | |
Collapse
|
10
|
Sang M, Shin J, Kim K, Yu KJ. Electronic and Thermal Properties of Graphene and Recent Advances in Graphene Based Electronics Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E374. [PMID: 30841599 PMCID: PMC6474003 DOI: 10.3390/nano9030374] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Revised: 02/19/2019] [Accepted: 02/21/2019] [Indexed: 12/18/2022]
Abstract
Recently, graphene has been extensively researched in fundamental science and engineering fields and has been developed for various electronic applications in emerging technologies owing to its outstanding material properties, including superior electronic, thermal, optical and mechanical properties. Thus, graphene has enabled substantial progress in the development of the current electronic systems. Here, we introduce the most important electronic and thermal properties of graphene, including its high conductivity, quantum Hall effect, Dirac fermions, high Seebeck coefficient and thermoelectric effects. We also present up-to-date graphene-based applications: optical devices, electronic and thermal sensors, and energy management systems. These applications pave the way for advanced biomedical engineering, reliable human therapy, and environmental protection. In this review, we show that the development of graphene suggests substantial improvements in current electronic technologies and applications in healthcare systems.
Collapse
Affiliation(s)
- Mingyu Sang
- School of Electrical & Electronic Engineering, Yonsei University, Seoul 03722, Korea.
| | - Jongwoon Shin
- School of Electrical & Electronic Engineering, Yonsei University, Seoul 03722, Korea.
| | - Kiho Kim
- School of Electrical & Electronic Engineering, Yonsei University, Seoul 03722, Korea.
| | - Ki Jun Yu
- School of Electrical & Electronic Engineering, Yonsei University, Seoul 03722, Korea.
| |
Collapse
|
11
|
Micro-Nano Scale Surface Coating for Nucleate Boiling Heat Transfer: A Critical Review. ENERGIES 2018. [DOI: 10.3390/en11113189] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Nucleate boiling is a phase change heat transfer process with a wide range of applications i.e., steam power plants, thermal desalination, heat pipes, domestic heating and cooling, refrigeration and air-conditioning, electronic cooling, cooling of turbo-machinery, waste heat recovery and much more. Due to its quite broad range of applications, any improvement in this area leads to significant economic, environmental and energy efficiency outcomes. This paper presents a comprehensive review and critical analysis on the recent developments in the area of micro-nano scale coating technologies, materials, and their applications for modification of surface geometry and chemistry, which play an important role in the enhancement of nucleate boiling heat transfer. In many industrial applications boiling is a surface phenomenon, which depends upon its variables such as surface area, thermal conductivity, wettability, porosity, and roughness. Compared to subtractive methods, the surface coating is more versatile in material selection, simple, quick, robust in implementation and is quite functional to apply to already installed systems. The present status of these techniques for boiling heat transfer enhancement, along with their future challenges, enhancement potentials, limitations, and their possible industrial implementation are also discussed in this paper.
Collapse
|
12
|
Hemasiri BWNH, Kim JK, Lee JM. Fabrication of highly conductive graphene/ITO transparent bi-film through CVD and organic additives-free sol-gel techniques. Sci Rep 2017; 7:17868. [PMID: 29259236 PMCID: PMC5736725 DOI: 10.1038/s41598-017-18063-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Accepted: 12/05/2017] [Indexed: 11/13/2022] Open
Abstract
Indium tin oxide (ITO) still remains as the main candidate for high-performance optoelectronic devices, but there is a vital requirement in the development of sol-gel based synthesizing techniques with regards to green environment and higher conductivity. Graphene/ITO transparent bi-film was synthesized by a two-step process: 10 wt. % tin-doped ITO thin films were produced by an environmentally friendly aqueous sol-gel spin coating technique with economical salts of In(NO3)3.H2O and SnCl4, without using organic additives, on surface free energy enhanced (from 53.826 to 97.698 mJm−2) glass substrate by oxygen plasma treatment, which facilitated void-free continuous ITO film due to high surface wetting. The chemical vapor deposited monolayer graphene was transferred onto the synthesized ITO to enhance its electrical properties and it was capable of reducing sheet resistance over 12% while preserving the bi-film surface smoother. The ITO films contain the In2O3 phase only and exhibit the polycrystalline nature of cubic structure with 14.35 ± 0.5 nm crystallite size. The graphene/ITO bi-film exhibits reproducible optical transparency with 88.66% transmittance at 550 nm wavelength, and electrical conductivity with sheet resistance of 117 Ω/sq which is much lower than that of individual sol-gel derived ITO film.
Collapse
Affiliation(s)
| | - Jae-Kwan Kim
- Department of Printed Electronics Engineering, Sunchon National University, Suncheon, Jeonnam, 57922, South Korea
| | - Ji-Myon Lee
- Department of Printed Electronics Engineering, Sunchon National University, Suncheon, Jeonnam, 57922, South Korea.
| |
Collapse
|
13
|
Hemasiri BWNH, Kim JK, Lee JM. Synthesis and Characterization of Graphene/ITO Nanoparticle Hybrid Transparent Conducting Electrode. NANO-MICRO LETTERS 2017; 10:18. [PMID: 30393667 PMCID: PMC6199067 DOI: 10.1007/s40820-017-0174-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 11/14/2017] [Indexed: 06/08/2023]
Abstract
The combination of graphene with conductive nanoparticles, forming graphene-nanoparticle hybrid materials, offers a number of excellent properties for advanced engineering applications. A novel and simple method was developed to deposit 10 wt% tin-doped indium tin oxide (ITO) nanoparticles on graphene. The method involved a combination of a solution-based environmentally friendly electroless deposition approach and subsequent vacuum annealing. A stable organic-free solution of ITO was prepared from economical salts of In(NO3)3 ·H2O and SnCl4. The obtained ITO nanostructure exhibited a unique architecture, with uniformly dispersed 25-35 nm size ITO nanoparticles, containing only the crystallized In2O3 phase. The synthesized ITO nanoparticles-graphene hybrid exhibited very good and reproducible optical transparency in the visible range (more than 85%) and a 28.2% improvement in electrical conductivity relative to graphene synthesized by chemical vapor deposition. It was observed that the ITO nanoparticles affect the position of the Raman signal of graphene, in which the D, G, and 2D peaks were redshifted by 5.65, 5.69, and 9.74 cm-1, respectively, and the annealing conditions had no significant effect on the Raman signatures of graphene.
Collapse
Affiliation(s)
| | - Jae-Kwan Kim
- Department of Printed Electronics Engineering, Sunchon National University, Suncheon, Jeonnam, 57922, South Korea
| | - Ji-Myon Lee
- Department of Printed Electronics Engineering, Sunchon National University, Suncheon, Jeonnam, 57922, South Korea.
| |
Collapse
|
14
|
Investigation of thermal energy transport interface of hybrid graphene-carbon nanotube/polyethylene nanocomposites. Sci Rep 2017; 7:14700. [PMID: 29089620 PMCID: PMC5666017 DOI: 10.1038/s41598-017-14710-4] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 10/13/2017] [Indexed: 12/02/2022] Open
Abstract
It is well known the thermal properties of three-dimensional (3-D) hybrid graphene (GR)-carbon nanotube (CNT) structures are not superior to that of the individual GR and CNT, however, the 3-D hybrid GR-CNT structures can effectively improve the thermal properties of polymer matrix. Therefore, understanding the thermal energy transport in the interface between polymer matrix and 3-D hybrid GR-CNT structure is essential. Here, the enhancement mechanism of interfacial thermal transport of hybrid GR-CNT structure was explored by applying non-equilibrium molecular dynamics (NEMD) simulations. Three different types of hybrid GR-CNT structures were built. The influences of CNT radius and CNT type for the hybrid GR-CNT on the interfacial thermal properties were also analyzed. Computational results show that among the three different types of hybrid GR-CNT structures, the Model-I, i.e., the covalent bond hybrid GR-CNT structures are of the best interfacial thermal properties. Meanwhile, the CNT radius of hybrid GR-CNT structure has a great influence on the interfacial thermal properties.
Collapse
|
15
|
Ng BT, Lim ZY, Hung YM, Tan MK. Phase change modulated thermal switch and enhanced performance enabled by graphene coating. RSC Adv 2016. [DOI: 10.1039/c6ra17078a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A thermal switch based on the phase change of the liquid medium; thermal performance is improved substantially with graphene coating.
Collapse
Affiliation(s)
- Boon T. Ng
- School of Engineering
- Monash University Malaysia
- 47500 Bandar Sunway
- Malaysia
| | - Zhi Y. Lim
- School of Engineering
- Monash University Malaysia
- 47500 Bandar Sunway
- Malaysia
| | - Yew Mun Hung
- School of Engineering
- Monash University Malaysia
- 47500 Bandar Sunway
- Malaysia
| | - Ming K. Tan
- School of Engineering
- Monash University Malaysia
- 47500 Bandar Sunway
- Malaysia
| |
Collapse
|