EP21.11: A rare non‐immune cause of fetal anemia Parasuraman, R.; Wellesley, D.; Brown, K. ...
Ultrasound in obstetrics & gynecology,
October 2023, 2023-10-00, 20231001, Letnik:
62, Številka:
S1
Journal Article
This work investigates and reports on the fabrication of a ZnO nanosheets/p-Si heterojunction energy harvester. The proposed nanostructure device exhibits two key functionalities: energy harvesting ...and memristive characteristics. This allows the device to perform multiple tasks. The ZnO nanostructure sheet was grown using a hydrothermal method. To minimize defect states at the electrode-substrate interface, an optimal phosphorus doping process was employed to achieve minimal substrate sheet resistance. Under an applied pushing force of 0.259 kgf, the energy harvester generated an output voltage and current of 0.5548 V and 44 μA, respectively. The proposed structure produces an output of 24.41 μW at 13 Hz for 2000 cycles. Investigation of the device's transfer characteristics revealed memristive behavior with an on/off ratio of 107. These findings suggest that the multifunctional ZnO nanosheets/p-Si electronic device reported here has promising potential for applications in the Internet of Things (IoT).
An ZnO nanostructure and the MoS
2
switching mechanism in a heterostructure are applied in this work to improve the photoconversion efficiency of a solar cell. The carrier transport of MoS
2
at the ...MoS
2
/Si interface generates more electron–hole pairs. The photoswitching performance of the MoS
2
active layer with a thickness of 30 nm is increased by the effective light trapping of the ZnO nanostructure, achieving a short-circuit current density of 40.99 mA cm
−2
based on a surface recombination velocity of 0.2165 × 10
5
m s
−1
for electrons and 0.1901 × 10
5
m s
−1
for holes. The electron and hole mobility are found to be 100 cm
2
V
−1
s
−1
and 150 cm
2
V
−1
s
−1
, respectively. The Joule and Shockley–Read–Hall (SRH) heating rates are calculating using the steady-state method, yielding values on the magnitude of 10
13
and 10
12
W m
−3
, respectively. The thermal stability is improved because of the photoswitching characteristics of the MoS
2
with electron and hole lifetimes of 0.1 ns and the reduced SRH and Joule heating rates. Such combined use of both ZnO and MoS
2
nanostructures results in a photoconversion efficiency of 27.73%.
Abstract Introduction The aim of this study was to investigate the combined effect of statin and α-tricalcium phosphate (α-TCP) on odontoblastic differentiation of human dental pulp cells and to ...compare them with mineral trioxide aggregate (MTA). Methods Experimental cements were prepared with TCP containing simvastatin and atorvastatin. Cell proliferation, cell adherence on a dentin disc, alkaline phosphatase (ALP) activity, expression of osteogenic/odontoblastic markers, and mineralization of the human dental pulp cells on experimental cement and MTA were assessed. Results The cell growth and ALP activity of TCP containing simvastatin–treated cells was greater than MTA-treated cells. The mineralization and messenger RNA expression of markers (ie, dentin sialophosphoprotein, dentin matrix protein 1, bone morphogenetic protein 2, ALP, and osteonectin) of TCP containing simvastatin– and TCP containing atorvastatin–treated cells were comparable with MTA-treated cells. The enhanced cell proliferation and similar level of ALP of TCP-treated cells compared with the control indicate that α-TCP is an effective osteoconductive material. The differentiation effect observed in TCP containing simvastatin– and TCP containing atorvastatin–treated cells is attributed to the effect of statin. Conclusions The results suggest that α-TCP can be used for local delivery of statin as a pulp capping material to accelerate reparative dentin formation.
