Controlled growth of carbon nanotubes on electrodes under different bias polarity

Gao, Yunfang; Zhou, Yuting; Xiong, Wei; Mahjouri‐Samani, Masoud; Mitchell, M.; Lu, Yongfeng

doi:10.1063/1.3246144

Cited by 13 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Traditional methods of CNT synthesis via CVD or arc discharge were able to create long CNTs but in a highly tangled fashion. Gao et al was able to achieve various alignments of CNTs on an electrode surface by the application of electrical biases at different polarities during laser-assisted CVD CNT growth (Gao et al 2009 ). Vertically-aligned CNTs produced on the cathode from this method were observed to have a neat and clean edge.…”

Section: Vertically Aligned Cnt Sensorsmentioning

confidence: 98%

Carbon Nanotubes: Advances, Integration and Applications to Printable Electrode-Based Biosensors

Hung

Kerman

2015

Nanobiosensors and Nanobioanalyses

View full text Add to dashboard Cite

The development of novel analytical techniques for biosensor application has been an area of intense research efforts in the past decade and, in a fi eld where the demand for rapid and cost-effective analyses is high, the use of screen-printed electrodes as opposed to conventional macroelectrodes can effectively satisfy these demands. With advancements in nanotechnology, the use of nanomaterials in biosensors has also added another level of customizability and sensitivity. In this chapter, we described the use of carbon nanotubes in printable electrode-based biosensors for label-free detection approaches for the detection of environmental contaminants and biologically relevant substrates. A discussion of past developments and recent advancements will highlight the broad range of experimental designs suitable for biosensing applications. With continual innovation in this fi eld, it is expected that screen-printing technology will come to the fore in biosensing technology and progress successfully to overcome fundamental challenges in the biosensor fi eld.

show abstract

Section: Vertically Aligned Cnt Sensorsmentioning

confidence: 98%

Carbon Nanotubes: Advances, Integration and Applications to Printable Electrode-Based Biosensors

Hung

Kerman

2015

Nanobiosensors and Nanobioanalyses

View full text Add to dashboard Cite

show abstract

“…In the case of growing aligned CNTs during the growth process, a self‐biased electric field can be applied to the substrate to help align the CNTs . An external electric field is normally used to achieve field‐directed growth of horizontally aligned CNTs on substrates . Typically, SWCNTs can be field directed along the electric field direction above 130 kV m −1 DC field strength or above 250 kV m −1 AC field strength.…”

Section: Mechanisms Of Cnts Alignmentmentioning

confidence: 99%

Directed and On‐Demand Alignment of Carbon Nanotube: A Review toward 3D Printing of Electronics

Goh

Agarwala

Yeong

2019

Adv Materials Inter

123

View full text Add to dashboard Cite

Carbon nanotubes (CNTs) are 1D nanostructured materials with unique mechanical, optical, and electrical properties which can be potentially exploited for fabricating wide variety of devices. In addition, the biocompatibility of CNTs makes it attractive for wearable and implantable technology applications. Well‐aligned CNT structures show enhanced properties such as superior electron mobility, strain sensitivity, better mechanical property, and enhanced performance and reproducibility that are absent in their disordered counterparts, thus allowing more promising applications in various fields. With aligned CNTs, devices can be optimized to exhibit better performance with lesser materials and more miniature designs. This review summarizes the landscape of CNTs alignment, either during the growth or post‐growth processing. This paper delineates various CNTs alignment mechanism, process parameters, and challenges of each technique. A comparative discussion on the advantages, disadvantages, and degree of alignment of each technique is presented. A detailed discussion on the various applications that utilize properties of aligned CNTs devices is presented. The advent of 3D printing techniques for printing CNTs for novel and futuristic applications is also discussed.

show abstract

“…We anticipate in this paper that the application of an electric field during the synthesis will induce such an external force over the ionized molecules (as a consequence of the cracking temperature in catalyst and carbon molecules). Such forces must stimulate a tip or base growing during the The growth of CNTs in the presence of electric fields has previously been studied by many authors (Nojeh et al 2004;Gao et al 2009;Dittmer et al 2004;Bower et al 2000;Zhang et al 2001), with the result that in all cases a growing trend is observed in the field direction. All these experimental assemblies were designed on a microscopic scale allowing studying the growth dynamics of individual CNTs.…”

Section: Introductionmentioning

confidence: 98%

Electric field effect in the growth of carbon nanotubes

et al. 2015

View full text Add to dashboard Cite

The growth of carbon nanotubes (CNTs) under a controlled electric field in a chemical vapor deposition system is investigated. We evaluate the influence of this external field on the morphological and structural characteristics of CNTs. Scanning electron microscopy results display a large presence of carbonaceous material in the positive plate, which appear to be a consequence of the attraction of electric forces over the electronically unbalanced cracked carbon molecules in the heating zone. We also observe a growth behavior for CNTs, in which catalyst particles are localized either at the bottom or the upper part of the nanotube, depending on the intensity and direction of the electric field. A Raman analysis from all obtained carbon materials shows the presence of two peaks, corresponding to the D * 1340 cm -1 and G * 1590 cm -1 bands attributed to multiwall CNTs. The average diameter of the CNTs is in the range between 90 and 40 nm. These results provide experimental evidence for the dependence of the catalyst and subtract interaction on the growing mechanism, in which weak chemical or electronic interactions could stimulate a top-growing as the strongest base-growing process.

show abstract

Controlled growth of carbon nanotubes on electrodes under different bias polarity

Cited by 13 publications

References 21 publications

Carbon Nanotubes: Advances, Integration and Applications to Printable Electrode-Based Biosensors

Carbon Nanotubes: Advances, Integration and Applications to Printable Electrode-Based Biosensors

Directed and On‐Demand Alignment of Carbon Nanotube: A Review toward 3D Printing of Electronics

Electric field effect in the growth of carbon nanotubes

Contact Info

Product

Resources

About