Anchoring black phosphorus quantum dots over carboxylated multiwalled carbon nanotubes: a stable 0D/1D nanohybrid with high sensing performance to Ochratoxin A

Attachment of PbS quantum dots (QD) to single-walled carbon nanotubes (SWNT) and multiwalled carbon nanotubes (MWCNT) is described; wherein commercially obtained PbS-QD of size 2.7 nm, stabilized by oleic acid, are added to a suspension of single- or multiwalled carbon nanotubes (CNT) prefunctionalized noncovalently with 1,2-benzenedimethanethiol (1,2-BDMT) in ethanol. The aromatic part of 1,2-BDMT attaches to the CNT byπ-πstacking interactions, noncovalently functionalizing the CNT. The thiol part of the 1,2-BDMT on the functionalized CNT replaces oleic acid on the surface of the QD facilitating the noncovalent attachment of the QD to the CNT. The composites were characterized by TEM and FTIR spectroscopy. Quenching of NIR fluorescence of the PbS-QD on attachment to the carbon nanotubes (CNT) was observed, indicating FRET from the QD to the CNT.

Download Full-text

Magnetic nanoparticles embedded with graphene quantum dots and multiwalled carbon nanotubes as a sensing platform for electrochemical detection of progesterone

Sensors and Actuators B Chemical ◽

10.1016/j.snb.2016.07.066 ◽

2017 ◽

Vol 238 ◽

pp. 346-356 ◽

Cited By ~ 60

Author(s):

Majid Arvand ◽

Shiva Hemmati

Keyword(s):

Carbon Nanotubes ◽

Quantum Dots ◽

Magnetic Nanoparticles ◽

Multiwalled Carbon Nanotubes ◽

Electrochemical Detection ◽

Graphene Quantum Dots ◽

Multiwalled Carbon ◽

Sensing Platform

Download Full-text

Enhanced light sensing performance of a hybrid device developed using as-grown vertically aligned multiwalled carbon nanotubes on TCO substrates

RSC Advances ◽

10.1039/c4ra07833k ◽

2014 ◽

Vol 4 (87) ◽

pp. 46970-46975 ◽

Cited By ~ 5

Author(s):

Mahananda Baro ◽

Amreen A. Hussain ◽

Arup R. Pal

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Low Light ◽

Multiwalled Carbon ◽

Hybrid Device ◽

Light Sensing ◽

Direct Growth ◽

Vertically Aligned ◽

Self Powered ◽

Sensing Performance

We report direct growth of MWCNTs on TCO substrates and its applicability in low light sensitive self-powered hybrid photodetector.

Download Full-text

Enhanced vacuum sensing performance of multiwalled carbon nanotubes: role of defects and carboxyl functionalization

RSC Advances ◽

10.1039/c4ra13128b ◽

2015 ◽

Vol 5 (26) ◽

pp. 20479-20485 ◽

Cited By ~ 11

Author(s):

K. Rajavel ◽

M. Dinesh ◽

R. Saranya ◽

R. T. Rajendra Kumar

Keyword(s):

Carbon Nanotubes ◽

Multiwalled Carbon Nanotubes ◽

Multiwalled Carbon ◽

Surface Active ◽

Sensing Characteristics ◽

Carboxyl Functionalization ◽

Sensing Performance

The presence of surface active carboxylic sites and the nature of the (ordered and defective) stacking of graphite layers in the nanotubes determined the vacuum sensing characteristics.

Download Full-text

Tunable Chemical Grafting of Three-Dimensional Poly (3, 4-ethylenedioxythiophene)/Poly (4-styrenesulfonate)-Multiwalled Carbon Nanotubes Composite with Faster Charge-Carrier Transport for Enhanced Gas Sensing Performance

Sensors ◽

10.3390/s20092470 ◽

2020 ◽

Vol 20 (9) ◽

pp. 2470

Author(s):

Hyojae Kim ◽

Yeongseok Jang ◽

Gyeong Won Lee ◽

Seung Yun Yang ◽

Jinmu Jung ◽

...

Keyword(s):

Carbon Nanotubes ◽

Charge Carrier ◽

Multiwalled Carbon Nanotubes ◽

Carrier Transport ◽

Gas Sensing ◽

Three Dimensional ◽

Charge Carrier Transport ◽

Multiwalled Carbon ◽

Gas Molecules ◽

Sensing Performance

The three-dimensional volumetric application of conductive poly (3,4-ethylenedioxythiophene)/poly (4-styrenesulfonate) (PEDOT:PSS) to multiwalled carbon nanotubes (MWCNTs) has not been widely reported. In this study, the applicability of the 3D PEDOT:PSS-MWCNT composite for a gas sensor was investigated with different PEDOT:PSS concentrations. The gas-sensing performance of the 3D PEDOT:PSS-MWCNT composites was investigated using ethanol and carbon monoxide (CO) gas. Overall, in comparison with the pristine MWCNTs, as the PEDOT:PSS concentration increased, the 3D PEDOT:PSS-MWCNT composites exhibited increased conductivity and enhanced gas sensing performances (fast response and recovery times) to both ethanol and CO gases. Importantly, although the PEDOT:PSS coating layer reduced the number of sites for the adsorption and desorption of gas molecules, the charge-carrier transport between the gas molecules and MWCNTs was significantly enhanced. Thus, PEDOT:PSS can be chemically grafted to MWCNTs to enhance the connectivity and conductivity of a 3D network, leading to possible applications in gas sensors.

Download Full-text