Photocurrent in single walled carbon nanotubes

Shah, Khurshed A.; Parvaiz, M. Shunaid; Dar, G. N.

doi:10.1016/j.physleta.2019.04.024

Cited by 11 publications

(14 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carbon nanotubes (CNTs) are sheets of graphene rolled into tubes and have a hexagonal structure with free π-electrons, making them unique one-dimensional (1D) materials with excellent properties. 23 , 24 Similar to graphene, CNTs have a tunable band structure that contributes to their unique electrical and optical properties. 23 , 25 Furthermore, CNTs possess excellent photoconductive properties.…”

Section: Introductionmentioning

confidence: 99%

“… 23 , 24 Similar to graphene, CNTs have a tunable band structure that contributes to their unique electrical and optical properties. 23 , 25 Furthermore, CNTs possess excellent photoconductive properties. 26 Due to their 1D size, CNTs have the ability to produce and separate electron–hole pairs when exposed to light, exhibiting enhanced photoconductivity with increasing light intensity.…”

Section: Introductionmentioning

confidence: 99%

“… 26 Due to their 1D size, CNTs have the ability to produce and separate electron–hole pairs when exposed to light, exhibiting enhanced photoconductivity with increasing light intensity. 23 , 27 As a result, CNTs are currently being used in optoelectronic devices, such as photoresistors, photodetectors, phototransistors, and other devices. 23 , 25 , 28 Although the optical properties of CNTs have been studied, their application in optoelectronic sensing for cancer cells remains elusive.…”

Section: Introductionmentioning

confidence: 99%

“… 23 , 27 As a result, CNTs are currently being used in optoelectronic devices, such as photoresistors, photodetectors, phototransistors, and other devices. 23 , 25 , 28 Although the optical properties of CNTs have been studied, their application in optoelectronic sensing for cancer cells remains elusive.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ultrasensitive Detection of MCF-7 Cells with a Carbon Nanotube-Based Optoelectronic-Pulse Sensor Framework

et al. 2022

View full text Add to dashboard Cite

Biosensors are of vital significance for healthcare by supporting the management of infectious diseases for preventing pandemics and the diagnosis of life-threatening conditions such as cancer. However, the advancement of the field can be limited by low sensing accuracy. Here, we altered the bioelectrical signatures of the cells using carbon nanotubes (CNTs) via structural loosening effects. Using an alternating current (AC) pulse under light irradiation, we developed a photo-assisted AC pulse sensor based on CNTs to differentiate between healthy breast epithelial cells (MCF-10A) and luminal breast cancer cells (MCF-7) within a heterogeneous cell population. We observed a previously undemonstrated increase in current contrast for MCF-7 cells with CNTs compared to MCF-10A cells with CNTs under light exposure. Moreover, we obtained a detection limit of ∼1.5 × 10 3 cells below a baseline of ∼1 × 10 4 cells for existing electrical-based sensors for an adherent, heterogeneous cell population. All-atom molecular dynamics (MD) simulations reveal that interactions between the embedded CNT and cancer cell membranes result in a less rigid lipid bilayer structure, which can facilitate CNT translocation for enhancing current. This as-yet unconsidered cancer cell-specific method based on the unique optoelectrical properties of CNTs represents a strategy for unlocking the detection of a small population of cancer cells and provides a promising route for the early diagnosis, monitoring, and staging of cancer.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultrasensitive Detection of MCF-7 Cells with a Carbon Nanotube-Based Optoelectronic-Pulse Sensor Framework

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Carbon is one of the most interesting elements, having a number of allotropes like graphite, diamond, fullerene, nanotube, C 60 and graphene [1]. After the successful synthesis of graphene, significant research has been conducted in characterizing carbon-based nanomaterials [2][3][4][5]. A large number of 2D carbon allotropes are being studied.…”

Section: Introductionmentioning

confidence: 99%

Electronic transport in penta-graphene nanoribbon devices using carbon nanotube electrodes: A computational study

Parvaiz¹,

Shah²,

Dar³

et al. 2020

Nanosystems: Phys. Chem. Math.

Self Cite

View full text Add to dashboard Cite

Electronic transport properties of pristine, homogenously and heterogeneously boron-nitrogen doped saw-tooth penta-graphene nanoribbon (SPGNR) with carbon nanotube electrodes have been studied using Extended Huckel Theory in combination with the non-equilibrium Green's function formalism. CNT electrodes produce a remarkable increase in current at higher bias voltages in pristine SPGNR. The current intensity is maximum at higher bias voltages, while the nitrogen-doped model shows current from the onset of the bias voltage. However, there are also considerable differences in the I-V curves associated with the pristine model and other models doped homogenously as well as heterogeneously with boron and nitrogen. The doped models also exhibit a small negative differential resistance effect, with much prominence in the nitrogen-doped model. In summary, our findings show clearly that doping can effectively modulate the electronic and the transport properties of penta-graphene nanoribbons that have not been studied and reported thus far.

show abstract

Function Graded Carbon Micro‐Structures for Powerless Photon Sensing with Intriguing µm‐Scale Position Sensitivity

Karamati,

Qu,

Bai

et al. 2023

Advanced Optical Materials

View full text Add to dashboard Cite

Partial laser treatment is introduced to carbon‐based microfibers to generate excellent photon sensing capability without bias. This treatment brings about a Seebeck coefficient distribution along the sample's length, out of which a photovoltage with no external bias is generated and sensed. Using a line‐shaped laser spot, carbon microfiber (CMF), graphene microfiber (GMF), and graphene aerogel fiber (GAF) are investigated for their response to µm‐scale photon irradiation. A higher sensitivity for the incident photon is found for the GAF with no position sensitivity. More Seebeck coefficient variation is also observed for the GAF considering the amount of laser power used for the laser treatment. A weaker Seebeck coefficient spatial variation is observed for the GMF compared with the GAF. However, its photovoltage shows an abrupt magnitude change from the laser‐treated region to the non‐treated one. Despite the low spatial variation of the Seebeck coefficient for the CMF, it features an excellent and accurate position‐sensitive photoresponse with polarization change over a distance of ≈100 µm. Such unique capability prompts novel applications in using partially annealed CMF for sensing the position of optical beams at the microscale.

show abstract

Photocurrent in single walled carbon nanotubes

Cited by 11 publications

References 29 publications

Ultrasensitive Detection of MCF-7 Cells with a Carbon Nanotube-Based Optoelectronic-Pulse Sensor Framework

Ultrasensitive Detection of MCF-7 Cells with a Carbon Nanotube-Based Optoelectronic-Pulse Sensor Framework

Electronic transport in penta-graphene nanoribbon devices using carbon nanotube electrodes: A computational study

Function Graded Carbon Micro‐Structures for Powerless Photon Sensing with Intriguing µm‐Scale Position Sensitivity

Contact Info

Product

Resources

About