5 research outputs found
Highly Sensitive and Selective Gas Detection Based on Silicene
Recent advances in the fabrication
of silicene devices have raised
exciting prospects for practical applications such as gas sensing.
We investigated the gas detection performance of silicene nanosensors
for four different gases (NO, NO<sub>2</sub>, NH<sub>3</sub>, and
CO) in terms of sensitivity and selectivity, employing density functional
theory and nonequilibrium Green’s function method. The structural
configurations, adsorption sites, binding energies and charge transfer
of all studied gas molecules on silicene nanosensors are systematically
discussed in this work. Our results indicate that pristine silicene
exhibits strong sensitivity for NO and NO<sub>2</sub>, while it appears
incapable of sensing CO and NH<sub>3</sub>. In an attempt to overcome
sensitivity limitations due to weak van der Waals interaction of those
latter gas molecules on the device, we doped pristine silicene with
either B or N atoms, leading to enhanced binding energy as well as
charge transfer, and subsequently a significant improvement of sensitivity.
A distinction between the four studied gases based on the silicene
devices appears possible, and thus these promise to be next-generation
nanosensors for highly sensitive and selective gas detection
Enhanced Power Output of a Triboelectric Nanogenerator using Poly(dimethylsiloxane) Modified with Graphene Oxide and Sodium Dodecyl Sulfate
In this work, a new
approach to modifying polyÂ(dimethylsiloxane) (PDMS) as a negative
triboelectric material using graphene oxide (GO) and a sodium dodecyl
sulfate (SDS) surfactant was reported. A porous PDMS@GO@SDS composite
triboelectric nanogenerator (TENG) could deliver an output voltage
and current of up to 438 V and 11 μA/cm<sup>2</sup>, respectively.
These values were 3-fold higher than those of the flat PDMS. The superior
performance is attributed to the intensified negative charges on PDMS
from the oxygen functional groups of GO and anionic head groups of
the SDS molecules. The outstanding performance and straightforward,
low-cost fabrication process of the PDMS@GO@SDS TENG would be beneficial
for the further development of powerful NGs integrated into wearable
electronics and self-charging power cells
Enhanced Power Output of a Triboelectric Nanogenerator using Poly(dimethylsiloxane) Modified with Graphene Oxide and Sodium Dodecyl Sulfate
In this work, a new
approach to modifying polyÂ(dimethylsiloxane) (PDMS) as a negative
triboelectric material using graphene oxide (GO) and a sodium dodecyl
sulfate (SDS) surfactant was reported. A porous PDMS@GO@SDS composite
triboelectric nanogenerator (TENG) could deliver an output voltage
and current of up to 438 V and 11 μA/cm<sup>2</sup>, respectively.
These values were 3-fold higher than those of the flat PDMS. The superior
performance is attributed to the intensified negative charges on PDMS
from the oxygen functional groups of GO and anionic head groups of
the SDS molecules. The outstanding performance and straightforward,
low-cost fabrication process of the PDMS@GO@SDS TENG would be beneficial
for the further development of powerful NGs integrated into wearable
electronics and self-charging power cells
Enhanced Power Output of a Triboelectric Nanogenerator using Poly(dimethylsiloxane) Modified with Graphene Oxide and Sodium Dodecyl Sulfate
In this work, a new
approach to modifying polyÂ(dimethylsiloxane) (PDMS) as a negative
triboelectric material using graphene oxide (GO) and a sodium dodecyl
sulfate (SDS) surfactant was reported. A porous PDMS@GO@SDS composite
triboelectric nanogenerator (TENG) could deliver an output voltage
and current of up to 438 V and 11 μA/cm<sup>2</sup>, respectively.
These values were 3-fold higher than those of the flat PDMS. The superior
performance is attributed to the intensified negative charges on PDMS
from the oxygen functional groups of GO and anionic head groups of
the SDS molecules. The outstanding performance and straightforward,
low-cost fabrication process of the PDMS@GO@SDS TENG would be beneficial
for the further development of powerful NGs integrated into wearable
electronics and self-charging power cells
Engleromophilane, a new broad spectrum bioactive eremophilane-type sesquiterpene from <i>Engleromyces sinensis</i> fungus
A new eremophilane sesquiterpene, named engleromophilane (1) together with known eremoxylarin E (2) and steroids (3-7) were isolated from the fungus Engleromyces sinensis culture. The structures were deduced by the analysis of spectroscopic and MS data, together with the comparison of calculated 13C NMR chemical shifts and Electronic Circular Dichroism (ECD) spectra. Compound 1 showed cytotoxic effects against Hela, PC-3, HT29 and A549 cell lines with IC50 in the ranges of 4.84–9.48 μg/mL. Compounds 1 and 2 exhibited substantial antimicrobial activity against E. coli, S. aureus, and B. subtilis. Moreover, compounds 1–3 showed α-glucosidase inhibitory activity, in which 2 displayed a strong inhibitory effect with an IC50 value of 0.13 ± 0.01 µg/mL. This work has given additional value to the E. sinensis fungus as a remarkable bioactive compound producer, together with the possibility of increasing cultivation to industrial scales.</p