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Carbon Nanotube Quantum Dot - PubAg

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Last Updated: 16 October 2021

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Platinum quantum dots enhance electrocatalytic activity of bamboo-like nitrogen doped carbon nanotubes embedding Co-MnO nanoparticles for methanol/ethanol oxidation

Here, the self-assembled nitrogen doped carbon nanotubes containing Co-MnO compound are effectively synthesized using dihydrodiamine as carbon and nitrogen resource with one-step synthesis. In order to additional boost the catalytic activity of Co-MnO/NCNTs for alcohol oxidation, percentages of platinum quantum dots are evenly packed on Co-MnO/NCNTs development of quaternary hybrid during microwave reduction phase. The present thickness of ethanol catalytic oxidation is less than that of methanol, which may be due to the partial oxidation of acetyl on the Pt crystal surface. A lot more importantly, carbon monoxide oxidation experiments reveal that solid electronic collaborating result between MnO and Pt quantum dot can significantly enhance the CO anti-poisoning capacity.

Source link: https://pubag.nal.usda.gov/catalog/7258382


Unraveling the surface states related Stokes shift dependent electrocatalytic activity of N-doped carbon quantum dots for photovoltaic applications

Modulating the optical properties of carbon quantum dots, such as blue to red exhaust, by differing the surface states is widely used for optical tools. Hereof, we modulated the surface states by varying the synthesis solvents to obtain CQDs with differing Stokes shift: blue-, eco-friendly-, and red-emissive CQDs denoted as BDs, rds, and gds, specifically. The RDs showed the largest Stokes-shift and better electrocatalytic task than those of the GDs and BDs. The efficiency of dye-sensitized solar cells using RDs-modified CNT as counter electrode approaches that of a conventional Pt-based counter electrode.

Source link: https://pubag.nal.usda.gov/catalog/7376275


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

In this work, an unique facile shut bipolar electrochemiluminescence sensor has been created for very delicate detection of sugar based on the combination of chitosan, poly-functioned multi-walled carbon nanotubes and graphene quantum dots-gold nanoparticles on the wax/carbon ink-screen-printed cloth-based device. When CS, PDDA-MWCNTs and GQDs-AuNPs are together embellished onto the cathode of shut bipolar electrode, the C-BPE anode can emit much stronger C-BP-ECL signals. Ultimately, the applicability and credibility of the C-BP-ECL sensor are demonstrated for the detection of sugar in human serum samples.

Source link: https://pubag.nal.usda.gov/catalog/6285888


CsPbBr3 perovskite quantum dots anchored on multiwalled carbon nanotube for efficient CO2 photoreduction

Herein, we illustrate the building and construction and construction of a multiwalled carbon nanotube/ CsPbBr ₃ perovskite quantum dots nanocomposite with efficient CO ₂ photoreduction task. When the content of MWCNT was 4. 0 wt%, the resultant CsPbBr ₃/ MWCNT exhibited the optimal photocatalytic efficiency, with the yields of carbon monoxide and CH ₄ 3. 14 and 2. 13 times that of immaculate CsPbBr ₃ QDs, respectively. The fast electron removal and transfer from CsPbBr ₃ QDs to MWCNT, along with the improved visible light harvesting ability accounted for the amazing photocatalytic performance.

Source link: https://pubag.nal.usda.gov/catalog/7416503


Enhanced Thermoelectric Properties of Bilayer-Like Structural Graphene Quantum Dots/Single-Walled Carbon Nanotubes Hybrids

In order to enhance the thermoelectric properties of single-walled carbon nanotubes, bilayer-like structures of graphene quantum dots and SWCNTs movies were prepared by directly finish GQDs on the surface area of SWCNTs movies. The special user interface structure of SWCNTs and gqds can not only improve provider transport to increase electric conductivity however scatter phonons to lower thermal conductivity.

Source link: https://pubag.nal.usda.gov/catalog/7090989


Probing the Dependence of Electron Transfer on Size and Coverage in Carbon Nanotube–Quantum Dot Heterostructures

As a model system for comprehending cost transfer in novel architectural styles for solar batteries, double-walled carbon nanotube-- CdSe quantum dot heterostructures have been made. Particularly, we associated proof of fee transfer as shown up by modifications in the NEXAFS intensities of π * vibration in the C K-edge and Cd M ₃-edge spectra, a noticeable outer tube G-band downshift in regularity in Raman spectra, in addition to changes in the threshold attributes present in transport data as a function of CdSe QD deposition onto the DWNT surface area. In particular, the different impacts of varying QD sizes and QD protection densities on the electron transfer were individually examined.

Source link: https://pubag.nal.usda.gov/catalog/5659799


Improving Charge Collection from Colloidal Quantum Dot Photovoltaics by Single-Walled Carbon Nanotube Incorporation

Improving cost collection is just one of the key issues for high-performance PbS colloidal quantum dot photovoltaics due to the substantial charge loss arising from the low flexibility and large issue densities of the 1,2-ethanedithiol-treated PbS quantum dot hole-transporting layer. The enhanced p-type characteristics and the boosted hole diffusion sizes of SWNT- or C₆₀@SWNT-incorporated HTL bring enhancement of the whole hole-transporting length and allow lossless hole collection, which causes the JSC enhancement of the CQDPVs.

Source link: https://pubag.nal.usda.gov/catalog/6677578


Microwave-assisted ultrafast in-situ growth of N-doped carbon quantum dots on multiwalled carbon nanotubes as an efficient electrocatalyst for photovoltaics

Combining of MWCNTs with nitrogen doped carbon quantum dots can impart the required active sites and diffusion. For the objective, NCQDs are usually affixed to MWCNTs by multistep processing, such as NCQDs synthesis, complied with by their intricate purification, surface area activation, and crosslinking with MWCNT. The focus of catalysts of NCQDs synthesis was optimized, to accomplish regulated straight growth of NCQDs on MWCNTs. In response, dye-sensitized solar cells employing NCQDs modified MWCNT as a counter electrode revealed 50% higher photovoltaic or pv efficiency as compared to bare MWCNTs.

Source link: https://pubag.nal.usda.gov/catalog/7159223


Understanding the excitation wavelength dependent spectral shift and large exciton binding energy of tungsten disulfide quantum dots and its interaction with single-walled carbon nanotubes

Herein, we investigate the origin of excitation wavelength reliant spooky features and high fluorescence quantum yield in fluorescent 2D tungsten disulfide quantum dots of typical size 2. 4 nm. We study the interaction between fluorescent WS ₂ QDs and single-walled carbon nanotubes and explore the mechanism of organized quenching of PL of QDs by SWCNTs. Our research even more exposes that flaw sites in SWCNTs mostly act as the binding sites for WS ₂ QDs and form non-fluorescent facilities for efficient quenching of the PL. The strong interaction between the WS ₂ QDs and the SWCNTs is evidenced from the spooky change in the X-ray photoelectron spectroscopy and Raman heights. Our study discloses the origin of excitation wavelength reliant PL discharge from WS ₂ QDs and the nature of the communication in between WS ₂ SWCNTs and qds, which are vital for their applications in biomedical imaging and noticing, such as surface-enhanced Raman scattering, etc.

Source link: https://pubag.nal.usda.gov/catalog/6760663


Graphene Quantum Dots/Multiwalled Carbon Nanotubes Composite-Based Electrochemical Sensor for Detecting Dopamine Release from Living Cells

Dopamine is an essential natural chemical related to nerve signaling and some illness. It is extremely significant to find DA in patients to control body function. As the carbon nanomaterials, GQDs have large surface to boost the conductivity of the electrodes, and the MWCNTs are superb electrode materials. This electrochemical sensing unit was successfully applied for detecting DA in human serum, and it was the first example to measure DA secreted from live PC12 cells with outstanding performance.

Source link: https://pubag.nal.usda.gov/catalog/6821709

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions