13 research outputs found
In situ detection of insulin-like growth factor II (IGF2) and H19 gene expression in hepatocellular carcinoma
Unusual presentation of a skull base mass lesion in sarcoidosis mimicking malignant neoplasm: a case report
Abstract Background Sarcoidosis is a multi-organ disease of unknown etiology characterised by the presence of epithelioid granulomas, without caseous necrosis. Systemic sarcoidosis is rare among children, while neurosarcoidosis in children is even rarer whether it is systemic or not. Case presentation We described the case of a 12-year-old boy who presented with monocular vision loss accompanied by unusual MRI features of an extensive meningeal infiltrating mass lesion. The patient underwent surgical resection (biopsy) via a frontotemporal craniotomy to establish a definitive diagnosis based on the histopathology, since neurosarcoidosis remains a very difficult diagnosis to establish from neuroradiogenic imagings. Based on the histopathology of the resected mass lesion, neurosarcoidosis was diagnosed. On follow-up after 3Â months of steroid therapy, the patient displayed a good response on the imaging studies. MRI revealed that the preexisting mass lesion had regressed extremely. We also conducted a small literature review on imaging studies, manifestations, appropriate treatments, etc., in particular neurosarcoidosis including children. Conclusion Although extremely rare, neurosarcoidosis, even in children, should be considered in the differential diagnosis of skull base mass lesions to avoid unnecessary aggressive surgery and delay in treatment, since surgery may have little role in the treatment of sarcoidosis
Endothelial nitric oxide synthase genotypes are not associated with the development of collateral portal veins in cirrhosis
Highly Reliable Silver Nanowire Transparent Electrode Employing Selectively Patterned Barrier Shaped by Self-Masked Photolithography
Spectrophotometric determination of cationic surfactants by formation of ternary complexes with Fe(III) and chrome azurol
Cu Salt Ink Formulation for Printed Electronics using Photonic Sintering
We formulate copper salt (copper
formate/acetate/oleate) precursor
inks for photonic sintering using high-intensity pulsed light (HIPL)
based on the ink’s light absorption ability. The inks can be
developed through controllable crystal field splitting states (i.e.,
the ligand weights and their coordination around the metal centers).
The inks’ light absorption properties are extremely sensitive
to the carbon chain lengths of the ligands, and the ink colors can
drastically change. From the relationship between the ratios of C/Cu
and the required sintering energies, it is possible to ascertain that
the integral absorbance coefficients are strongly correlated with
the photonic sintering behavior. These results suggest that the ink
absorbance properties are the most important factors in photosintering.
The wires formed by sintered copper formate complex ink via the HIPL
method showed good electronic conduction, achieving a low resistivity
of 5.6 × 10<sup>–5</sup> Ω cm. However, the resistivity
of the wires increased with increasing contains carbon chain length
of the inks, suggesting that large amounts of residual carbon have
negative effects on both the wire’s surface morphology and
the electrical conductivity. We find in this study that high light
absorptivity and low carbon inks would lead to a lower environmental
load in future by reducing both energy usage and carbon oxide gas
emissions
Highly Reliable Silver Nanowire Transparent Electrode Employing Selectively Patterned Barrier Shaped by Self-Masked Photolithography
The
transparent electrode based on silver nanowire (AgNW) networks
is one promising alternative of indium tin oxide film in particular
for advanced flexible and printable electronics. However, the widespread
application of AgNW electrode is hindered by its poor long-term reliability.
Although the reliability can be improved by applying traditional overcoating
layer or the core–shell structure, the transmittance or conductivity
is inevitably undermined. In this paper, a novel patterned barrier
of photoresist in situ assembled on the nanowire surface realized
the reliability enhancement by simply employing AgNWs themselves as
the mask in the photolithography process. The patterned barrier selectively
covered the nanowires, while keeping the high transmittance and conductivity
unchanged and improving the adhesion of AgNW networks on substrate.
After 720 h storage in 85 °C/85% relative humidity (RH) environment,
the resistance of electrode with patterned barrier only increased
by 0.72 times. This study proposes a new way, i.e., the in situ patterned
barrier containing light-sensitive substance, to selectively protect
AgNW networks, which can be expanded to various metallic networks
including nanowires, nanorods, nanocables, electrospun nanofibers,
and so on
One-Step Fabrication of Stretchable Copper Nanowire Conductors by a Fast Photonic Sintering Technique and Its Application in Wearable Devices
Copper nanowire (CuNW) conductors
have been considered to have a promising perspective in the area of
stretchable electronics due to the low price and high conductivity.
However, the fabrication of CuNW conductors suffers from harsh conditions,
such as high temperature, reducing atmosphere, and time-consuming
transfer step. Here, a simple and rapid one-step photonic sintering
technique was developed to fabricate stretchable CuNW conductors on
polyurethane (PU) at room temperature in air environment. It was observed
that CuNWs were instantaneously deoxidized, welded and simultaneously
embedded into the soft surface of PU through the one-step photonic
sintering technique, after which highly conductive network and strong
adhesion between CuNWs and PU substrates were achieved. The CuNW/PU
conductor with sheet resistance of 22.1 Ohm/sq and transmittance of
78% was achieved by the one-step photonic sintering technique within
only 20 μs in air. Besides, the CuNW/PU conductor could remain
a low sheet resistance even after 1000 cycles of stretching/releasing
under 10% strain. Two flexible electronic devices, wearable sensor
and glove-shaped heater, were fabricated using the stretchable CuNW/PU
conductor, demonstrating that our CuNW/PU conductor could be integrated
into various wearable electronic devices for applications in food,
clothes, and medical supplies fields
One-Step Fabrication of Stretchable Copper Nanowire Conductors by a Fast Photonic Sintering Technique and Its Application in Wearable Devices
Copper nanowire (CuNW) conductors
have been considered to have a promising perspective in the area of
stretchable electronics due to the low price and high conductivity.
However, the fabrication of CuNW conductors suffers from harsh conditions,
such as high temperature, reducing atmosphere, and time-consuming
transfer step. Here, a simple and rapid one-step photonic sintering
technique was developed to fabricate stretchable CuNW conductors on
polyurethane (PU) at room temperature in air environment. It was observed
that CuNWs were instantaneously deoxidized, welded and simultaneously
embedded into the soft surface of PU through the one-step photonic
sintering technique, after which highly conductive network and strong
adhesion between CuNWs and PU substrates were achieved. The CuNW/PU
conductor with sheet resistance of 22.1 Ohm/sq and transmittance of
78% was achieved by the one-step photonic sintering technique within
only 20 μs in air. Besides, the CuNW/PU conductor could remain
a low sheet resistance even after 1000 cycles of stretching/releasing
under 10% strain. Two flexible electronic devices, wearable sensor
and glove-shaped heater, were fabricated using the stretchable CuNW/PU
conductor, demonstrating that our CuNW/PU conductor could be integrated
into various wearable electronic devices for applications in food,
clothes, and medical supplies fields