Percolation in Transparent and Conducting Carbon Nanotube Networks

Hu, Liangbing; Hecht, David S.; Grüner, G.

doi:10.1021/nl048435y

Cited by 1,061 publications

(1,069 citation statements)

References 31 publications

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“…In the special case of a metallic thin film (film thickness much smaller than wavelength of light) in air, the electro-optical properties can be modeled as 13,43,44 …”

Section: Resultsmentioning

confidence: 99%

Continuous and Scalable Fabrication of Transparent Conducting Carbon Nanotube Films

Irvin²,

2009

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We report an industrially scalable, fast, and simple process for the large scale fabrication of optically transparent and electrically conducting thin films of single-walled carbon nanotubes (SWNT). Purified, pristine HiPco SWNTs were dispersed in water at high concentrations with the help of surfactants, rod-coated into uniform thin films, and doped by various acids. We show how to combine different surfactants to make uniform dispersions with high concentration of SWNTs and optimal rheological behavior for coating and drying, including preventing dewetting and film rupture that has plagued earlier attempts. Doping by fuming sulfuric acid yielded the films with best performance (sheet resistance of 100 and 300 ⍀/sq for respective transparency of 70% and 90%). We use a figure of merit (FOM) plot for an immediate evaluation and comparison of the performance and microstructure of CNT films produced by different methods. Further scientific engineering will pave the way to the deployment of CNT films in commercial applications.

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“…In the special case of a metallic thin film (film thickness much smaller than wavelength of light) in air, the electro-optical properties can be modeled as 13,43,44 …”

Section: Resultsmentioning

confidence: 99%

Continuous and Scalable Fabrication of Transparent Conducting Carbon Nanotube Films

Irvin²,

2009

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“…where σ dc and σ op are the DC and optical conductivities, respectively; Z o is the impedance of free space (377 ) [37][38][39]. For a system that obeys this relation, a plot of the left-hand side vs. Z o /2R s will result in a straight line, the slope of which is the dimensionless ratio σ op /σ dc .…”

Section: Resultsmentioning

confidence: 99%

Transparent, conductive solution processed spincast 2D Ti₂CT_x (MXene) films

Ying

Dillon

Fafarman

et al. 2017

Materials Research Letters

137

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Herein, we spincast aqueous colloidal Ti 2 CT x (MXene) solutions into conductive, transparent films with figures of merit (FOM), that are as good as Ti 3 C 2 T x or un-doped chemically vapor-deposited graphene. When normalized by the number of transition metal atoms, the FOM is the highest ever reported for a MXene film. At about 2.7 × 10 5 cm -1 the absorbance coefficient of Ti 2 CT x is quite comparable to that of Ti 3 C 2 T x . Quantitative relationships between film properties-conductance and transparency-and colloidal solution concentration and spin speeds are developed providing a road map for future work. IMPACT STATEMENTIn a first, we spincast aqueous colloidal Ti 2 CT x (MXene) solutions into conductive, transparent films with figures of merit-5-that are as good as Ti 3 C 2 T x or un-doped CVD graphene. ARTICLE HISTORY

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“…As previously mentioned, experimental studies have found a direct relationship between the volume of solution deposited and the volume fraction of the resulting network [5]. Figure 3 shows the relationship between the volume fraction and the total number of rods randomly distributed in the film.…”

Section: Resultsmentioning

confidence: 70%

“…The density of a specific CNT film can also be expressed in terms of its volumetric fraction occupied by nanotubes. The volume fraction of a typical laboratory produced nanotube film is related to the volume of CNT solution used for deposition [5,6], and can be directly measured. In a computer simulation, the volume fraction depends on the total number of rods distributed inside the box, and is calculated directly for each configuration generated.…”

Section: Random Network Of Finite Rodsmentioning

confidence: 99%

Electronic transport on carbon nanotube networks: A multiscale computational approach

Pereira

Ferreira

2011

Nano Communication Networks

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Carbon nanotube networks are one of the candidate materials to function as malleable, transparent, conducting films, with the technologically promising application of being used as flexible electronic displays. Nanotubes disorderly distributed in a film offers many possible paths for charge carriers to travel across the entire system, but the theoretical description of how this charge transport occurs is rather challenging for involving a combination of intrinsic nanotube properties with network morphology aspects. Here we attempt to describe the transport properties of such films in two different length scales. Firstly, from a purely macroscopic point of view we carry out a geometrical analysis that shows how the network connectivity depends on the nanotube concentration and on their respective aspect ratio. Once this is done, we are able to calculate the resistivity of a heavily disordered networked film. Comparison with experiment offers us a way to infer about the junction resistance between neighbouring nanotubes. Furthermore, in order to guide the frantic search for high-conductivity films of nanotube networks, we turn to the microscopic scale where we have developed a computationally efficient way for calculating the ballistic transport across these networks. While the ballistic transport is probably not capable of describing the observed transport properties of these films, it is undoubtedly useful in establishing an upper value for their conductivity. This can serve as a guideline in how much room there is for improving the conductivity of such networks.

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Percolation in Transparent and Conducting Carbon Nanotube Networks

Cited by 1,061 publications

References 31 publications

Continuous and Scalable Fabrication of Transparent Conducting Carbon Nanotube Films

Continuous and Scalable Fabrication of Transparent Conducting Carbon Nanotube Films

Transparent, conductive solution processed spincast 2D Ti₂CT_x (MXene) films

Electronic transport on carbon nanotube networks: A multiscale computational approach

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Percolation in Transparent and Conducting Carbon Nanotube Networks

Cited by 1,061 publications

References 31 publications

Continuous and Scalable Fabrication of Transparent Conducting Carbon Nanotube Films

Continuous and Scalable Fabrication of Transparent Conducting Carbon Nanotube Films

Transparent, conductive solution processed spincast 2D Ti2CTx (MXene) films

Electronic transport on carbon nanotube networks: A multiscale computational approach

Contact Info

Product

Resources

About

Transparent, conductive solution processed spincast 2D Ti₂CT_x (MXene) films