Oxidant mediated one-step complete conversion of multi-walled carbon nanotubes to graphene quantum dots and their bioactivity against mammalian and bacterial cells

A simple, low cost, safe, easy to execute, one-step synthesis of uniform, and monodispersed GQDs with selective toxicity towards the bacterial cells rather than the mammalian cells is reported.

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Multi-Walled Carbon Nanotubes Decorated with Guanidinylated Dendritic Molecular Transporters: An Efficient Platform for the Selective Anticancer Activity of Doxorubicin

Pharmaceutics ◽

10.3390/pharmaceutics13060858 ◽

2021 ◽

Vol 13 (6) ◽

pp. 858

Author(s):

Kyriaki-Marina Lyra ◽

Archontia Kaminari ◽

Katerina N. Panagiotaki ◽

Konstantinos Spyrou ◽

Sergios Papageorgiou ◽

...

Keyword(s):

Carbon Nanotubes ◽

Anticancer Activity ◽

Cancer Cells ◽

Delivery System ◽

Colloidal Stability ◽

Triggered Release ◽

Selective Toxicity ◽

Molecular Transporters ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

An efficient doxorubicin (DOX) drug delivery system with specificity against tumor cells was developed, based on multi-walled carbon nanotubes (MWCNTs) functionalized with guanidinylated dendritic molecular transporters. Acid-treated MWCNTs (oxCNTs) interacted both electrostatically and through hydrogen bonding and van der Waals attraction forces with guanidinylated derivatives of 5000 and 25,000 Da molecular weight hyperbranched polyethyleneimine (GPEI5K and GPEI25K). Chemical characterization of these GPEI-functionalized oxCNTs revealed successful decoration with GPEIs all over the oxCNTs sidewalls, which, due to the presence of guanidinium groups, gave them aqueous compatibility and, thus, exceptional colloidal stability. These GPEI-functionalized CNTs were subsequently loaded with DOX for selective anticancer activity, yielding systems of high DOX loading, up to 99.5% encapsulation efficiency, while the DOX-loaded systems exhibited pH-triggered release and higher therapeutic efficacy compared to that of free DOX. Most importantly, the oxCNTs@GPEI5K-DOX system caused high and selective toxicity against cancer cells in a non-apoptotic, fast and catastrophic manner that cancer cells cannot recover from. Therefore, the oxCNTs@GPEI5K nanocarrier was found to be a potent and efficient nanoscale DOX delivery system, exhibiting high selectivity against cancerous cells, thus constituting a promising candidate for cancer therapy.

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One-step hydrothermal synthesis of sulfur-doped Ni2(OH)2CO3 neuroid network combined with multi-walled carbon nanotubes for high-performance asymmetric supercapacitors

Diamond and Related Materials ◽

10.1016/j.diamond.2021.108451 ◽

2021 ◽

pp. 108451

Author(s):

Jinfeng Zheng ◽

Xiao Lian ◽

Mingzai Wu ◽

Fangcai Zheng ◽

Yuanhao Gao ◽

...

Keyword(s):

Carbon Nanotubes ◽

Hydrothermal Synthesis ◽

High Performance ◽

Asymmetric Supercapacitors ◽

Multi Walled Carbon Nanotubes ◽

One Step ◽

Walled Carbon Nanotubes

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One-step synthesis of multi-walled carbon nanotubes/ultra-thin Ni(OH)2 nanoplate composite as efficient catalysts for water oxidation

Journal of Materials Chemistry A ◽

10.1039/c4ta01952k ◽

2014 ◽

Vol 2 (30) ◽

pp. 11799-11806 ◽

Cited By ~ 101

Author(s):

Xuemei Zhou ◽

Zhaoming Xia ◽

Zhiyun Zhang ◽

Yuanyuan Ma ◽

Yongquan Qu

Keyword(s):

Carbon Nanotubes ◽

Hydrothermal Synthesis ◽

Oxygen Evolution ◽

Oxygen Evolution Reaction ◽

Water Oxidation ◽

Highly Efficient ◽

Multi Walled Carbon Nanotubes ◽

One Step ◽

Walled Carbon Nanotubes

One-step hydrothermal synthesis of ultra-thin β-Ni(OH)2 nanoplates (1.5–3.0 nm thickness) and their composite with multi-walled carbon nanotubes in the absence of surfactants function as highly efficient and stable electrocatalysts for oxygen evolution reaction.

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Novel ionic bioartificial muscles based on ionically crosslinked multi-walled carbon nanotubes-mediated bacterial cellulose membranes and PEDOT:PSS electrodes

Smart Materials and Structures ◽

10.1088/1361-665x/ac4576 ◽

2021 ◽

Author(s):

Yaofeng Wang ◽

Fan Wang ◽

Yang Kong ◽

Lei Wang ◽

Qinchuan Li

Keyword(s):

Carbon Nanotubes ◽

Bacterial Cellulose ◽

Specific Capacitance ◽

High Performance ◽

Low Cost ◽

Actuation Voltage ◽

Fast Response ◽

Bending Deformation ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

Abstract High-performance bioartificial muscles with low-cost, large bending deformation, low actuation voltage, and fast response time have drawn extensive attention as the development of human-friendly electronics in recent years. Here, we report a high-performance ionic bioartificial muscle based on the bacterial cellulose (BC)/ionic liquid (IL)/multi-walled carbon nanotubes (MWCNT) nanocomposite membrane and PEDOT:PSS electrode. The developed ionic actuator exhibits excellent electro-chemo-mechanical properties, which are ascribed to its high ionic conductivity, large specific capacitance, and ionically crosslinked structure resulting from the strong ionic interaction and physical crosslinking among BC, IL, and MWCNT. In particular, the proposed BC-IL-MWCNT (0.10 wt%) nanocomposite exhibited significant increments of Young's modulus up to 75% and specific capacitance up to 77%, leading to 2.5 times larger bending deformation than that of the BC-IL actuator. More interestingly, bioinspired applications containing artificial soft robotic finger and grapple robot were successfully demonstrated based on high-performance BC-IL-MWCNT actuator with excellent sensitivity and controllability. Thus, the newly proposed BC-IL-MWCNT bioartificial muscle will offer a viable pathway for developing next-generation artificial muscles, soft robotics, wearable electronic products, flexible tactile devices, and biomedical instruments.

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Sensitivity enhancement of cloth-based closed bipolar electrochemiluminescence glucose sensor via electrode decoration with chitosan/multi-walled carbon nanotubes/graphene quantum dots-gold nanoparticles

Biosensors and Bioelectronics ◽

10.1016/j.bios.2019.01.027 ◽

2019 ◽

Vol 130 ◽

pp. 55-64 ◽

Cited By ~ 17

Author(s):

Dan Wang ◽

Yi Liang ◽

Yan Su ◽

Qiuping Shang ◽

Chunsun Zhang

Keyword(s):

Carbon Nanotubes ◽

Quantum Dots ◽

Gold Nanoparticles ◽

Glucose Sensor ◽

Graphene Quantum Dots ◽

Sensitivity Enhancement ◽

Multi Walled Carbon Nanotubes ◽

Walled Carbon Nanotubes

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Electrophoretic Deposition of Carbon Nanotubes for Interconnections in Microelectronics

MRS Proceedings ◽

10.1557/opl.2013.715 ◽

2013 ◽

Vol 1559 ◽

Author(s):

Chiew Keat Lim ◽

Yadong Wang ◽

Shixin Wu

Keyword(s):

Carbon Nanotubes ◽

Electric Fields ◽

Electrophoretic Deposition ◽

Flip Chip ◽

Low Cost ◽

Electrical Contacts ◽

Mechanical And Thermal Properties ◽

Multi Walled Carbon Nanotubes ◽

Bond Pads ◽

Walled Carbon Nanotubes

ABSTRACTCarbon nanotubes (CNTs) have been considered as a promising interconnect material to replace the solder bump used in the flip chip package because of their special electrical, mechanical and thermal properties, which may promote both the performance and reliability of the flip chip packaging. In this paper, electrophoretic deposition (EPD) of CNTs on substrates has been demonstrated for the interconnect application. EPD is a simple, low cost and high throughput process that is capable to produce densely packed film with good homogeneity at low temperature. By altering the electric fields and deposition time during the EPD process, the thickness of the CNTs film could be controlled. In this study, multi-walled carbon nanotubes (MWCNTs) were successfully coated on the various substrates using the EPD method. A highly uniform CNTs microstructure film with thickness over 5 µm was achieved. In addition, the selective depositions of CNTs on the pre-defined bond pads to form CNTs bumps were also accomplished. By employing typical flip-chip bonding technique, high density CNTs bumps were aligned to form a test chip/host substrate interconnects. The electrical conductivity of the CNTs interconnects was carried out using four-point probe measurement. Reliable electrical contacts with linear relationship in the current-voltage (I-V) characteristic suggesting ohmic behaviour were attained. The overall resistances extracted were also relatively low. These superior electrical properties have demonstrated that the CNTs bumps deposited using EPD method is a viable way to serve as an alternative to current metal solder interconnects material such as Sn-Pb alloys. Hence, it offers a promising interconnect application in the quest for device miniaturization in microelectronic industry.

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