Towards the synthesis of semiconducting single-walled carbon nanotubes by floating-catalyst chemical vapor deposition: Challenges of reproducibility

Ding, Er‐Xiong; Liu, Peng; Khan, Abu Taher; Zhang, Qiang; Wei, Nan; Jiang, Hua; Kauppinen, Esko I.

doi:10.1016/j.carbon.2022.04.020

Cited by 17 publications

(25 citation statements)

References 50 publications

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“…Furthermore, the electron− hole pairs generated at the junction can be efficiently separated by the built-in potential and contribute to the observed current. Additionally, as more than two-thirds of the SWCNTs are p-type semiconductors, which has been confirmed in our previous work, 41 the p−n heterojunction formed at the MoS 2 / SWCNT interface is another contributor to the photocurrent. 21 In contrast, the junction between ITO and MoS 2 is responsible for the low reverse current, which is possibly initiated by thermal-assisted tunneling due to the existence of a high Schottky barrier (Figure 3c).…”

Section: ■ Results and Discussionsupporting

confidence: 82%

“…SWCNTs were produced in a floating catalyst chemical vapor deposition reactor using isopropanol and ferrocene as the carbon source and catalyst precursor, respectively. The growth parameters are similar to those reported in our previous work . Then, the SWCNTs were collected downstream of the reactor with a Millipore membrane filter from which the SWCNTs can be easily press-transferred onto any smooth substrate.…”

Section: Methodsmentioning

confidence: 52%

“…The growth parameters are similar to those reported in our previous work. 41 Then, the SWCNTs were collected downstream of the reactor with a Millipore membrane filter from which the SWCNTs can be easily press-transferred onto any smooth substrate. The SWCNT film has an optical transmittance of 75.9% and a sheet resistance of ∼1000 Ω/sq.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Highly Sensitive MoS₂ Photodetectors Enabled with a Dry-Transferred Transparent Carbon Nanotube Electrode

Ding

Liu

Yoon

et al. 2023

ACS Appl. Mater. Interfaces

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Fabricating electronic and optoelectronic devices by transferring predeposited metal electrodes has attracted considerable attention, owing to the improved device performance. However, the pre-deposited metal electrode typically involves complex fabrication procedures. Here, we introduce our facile electrode fabrication process which is free of lithography, lift-off, and reactive ion etching by directly presstransferring a single-walled carbon nanotube (SWCNT) film. We fabricated Schottky diodes for photodetector applications using dry-transferred SWCNT films as the transparent electrode to increase light absorption in photoactive MoS 2 channels. The MoS 2 flake vertically stacked with an SWCNT electrode can exhibit excellent photodetection performance with a responsivity of ∼2.01 × 10 3 A/W and a detectivity of ∼3.2 × 10 12 Jones. Additionally, we carried out temperature-dependent current− voltage measurement and Fowler−Nordheim (FN) plot analysis to explore the dominant charge transport mechanism. The enhanced photodetection in the vertical configuration is found to be attributed to the FN tunneling and internal photoemission of charge carriers excited from indium tin oxide across the MoS 2 layer. Our study provides a novel concept of using a photoactive MoS 2 layer as a tunneling layer itself with a dry-transferred transparent SWCNT electrode for high-performance and energy-efficient optoelectronic devices.

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Section: ■ Results and Discussionsupporting

confidence: 82%

Section: Methodsmentioning

confidence: 52%

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Highly Sensitive MoS₂ Photodetectors Enabled with a Dry-Transferred Transparent Carbon Nanotube Electrode

Ding

Liu

Yoon

et al. 2023

ACS Appl. Mater. Interfaces

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“…However, the reproducibility of such highly pure s-SWCNTs remains low. [38] Wang et al developed a manufacturing method for large scale, continuous synthesis of SWCNT thin films involving FC-CVD using ferrocene, ethylene, and hydrogen and combining SWCNT synthesis, collection, and transfer. The SWCNTs produced by FC-CVD were collected using a filter membrane and dry-transferred to a PET substrate by pressure stamping.…”

Section: Cntsmentioning

confidence: 99%

Recent Advances in Integrating 1D Nanomaterials into Chemiresistive Gas Sensor Devices

Lin

Kilani

Mao

2023

Adv Materials Technologies

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There is rapid growth in the global gas sensor market driven by new regulations for industrial emission control and residential environments and increasing demand for portable devices. Nanosensors promise to be the next generation gas sensors for the direct detection of chemical species due to their ultrahigh sensitivity, fast response, ultralow weight, and low power consumption. However, transitioning nanosensors from basic research or prototype projects to commercial products encounters two major technical challenges: difficulty in scale up and inability to demonstrate real‐world use in changing humidity and temperature conditions. The advances in addressing these two technical challenges in recent literature are surveyed. The most common 1D nanomaterials in R&D for gas sensing, metal oxides, and carbon nanotubes, as well as less common metal nanowires and psudo‐1D crystals made from charge‐transfer complexes (CTCs) are included. This review delves into the specifics of each of these 1D nanomaterials for gas sensing applications, their synthesis and deposition, sensing performance, and commercial development in the last 5 years. It highlights the scalability of one‐step electrodeposition of CTC nanowires on prefabricated electrodes, at room temperature, and from solution in making gas nanosensors.

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“…In general, the process of chemical vapor deposition involves the reaction of a volatile precursor inserted into a horizontal furnace quartz tube (usually under vacuum). The furnace is heated up to the reaction temperature at which the precursor gas breaks down into a required material or desired coating and binds to the surface of the substrate material. , On injecting the precursor gas during the processing time, the coating material forms on the surface, and the exposed substrate forms coatings across the surface . As a result of its eco-friendliness and high carbon yield on the substrate surface, the CVD process is preferred in a variety of commercial applications, and it is in fact the least expensive and scalable method for the mass production of CNTs .…”

Section: Introductionmentioning

confidence: 99%

Direct Growth of Binder-Free CNTs on a Nickel Foam Substrate for Highly Efficient Symmetric Supercapacitors

et al. 2023

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In the modern civilized world, energy scarcity and associated environmental pollution are the center of focus in the search for reliable energy storage and harvesting devices. The need to develop cheaper and more competent binder-free electrodes for high-performance supercapacitors has attracted considerable research attention. In this study, two different procedures are followed to enhance the growth of carbon nanotubes (CNT-E and CNT-NF) directly coated on a Ni-foam substrate by a well-functioning chemical vapor deposition (CVD) method. Thus, directly grown optimized CNT electrodes are used as electrodes for electrochemical devices. Furthermore, solid-state symmetric supercapacitors are fabricated using CNT-NF//CNT-NF, and fruitful results are obtained with maximum specific capacitance (250.51 F/g), energy density (68.19 Wh/kg), and power density (2799.77 W/kg) at 1 A/g current density. The device exhibited good cyclic stability, with 92.42% capacitive retention and 99.68% Coulombic efficiency at 10 000 cycles, indicating the suitability of the electrodes for practical applications. This study emphasizes the importance of studying the direct growth of binder-free CNT electrodes to understand the actual behavior of electrodes and the proper storage mechanism.

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Towards the synthesis of semiconducting single-walled carbon nanotubes by floating-catalyst chemical vapor deposition: Challenges of reproducibility

Cited by 17 publications

References 50 publications

Highly Sensitive MoS₂ Photodetectors Enabled with a Dry-Transferred Transparent Carbon Nanotube Electrode

Highly Sensitive MoS₂ Photodetectors Enabled with a Dry-Transferred Transparent Carbon Nanotube Electrode

Recent Advances in Integrating 1D Nanomaterials into Chemiresistive Gas Sensor Devices

Direct Growth of Binder-Free CNTs on a Nickel Foam Substrate for Highly Efficient Symmetric Supercapacitors

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Towards the synthesis of semiconducting single-walled carbon nanotubes by floating-catalyst chemical vapor deposition: Challenges of reproducibility

Cited by 17 publications

References 50 publications

Highly Sensitive MoS2 Photodetectors Enabled with a Dry-Transferred Transparent Carbon Nanotube Electrode

Highly Sensitive MoS2 Photodetectors Enabled with a Dry-Transferred Transparent Carbon Nanotube Electrode

Recent Advances in Integrating 1D Nanomaterials into Chemiresistive Gas Sensor Devices

Direct Growth of Binder-Free CNTs on a Nickel Foam Substrate for Highly Efficient Symmetric Supercapacitors

Contact Info

Product

Resources

About

Highly Sensitive MoS₂ Photodetectors Enabled with a Dry-Transferred Transparent Carbon Nanotube Electrode

Highly Sensitive MoS₂ Photodetectors Enabled with a Dry-Transferred Transparent Carbon Nanotube Electrode