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Ultraviolet (UV) photodetectors play an important role in numerous commercial and scientific applications. The UV photodetectors based on binary‐cation indium zinc oxide (InZnO) thin films exhibit great performance enhancement, compared with their single‐cation counterparts. However, UV photodetectors based on 1D InZnO nanowires could potentially exhibit more superior optoelectrical performance, due to the large surface‐to‐volume ratio and favorable carrier transport characteristics of nanowires. This work has combined combustion synthesis with electrospinning technique to efficiently fabricate InZnO nanowire‐based UV photodetectors. At the annealing temperature of 375 °C, the newly designed InZnO nanowire photodetectors exhibit excellent photoelectric performance under the irradiation of 310 nm UV light, including a photo‐to‐dark current ratio of 1.2 × 104, a photo responsivity of 2.8 × 103 A W–1, and a high detectivity of 2.4 × 1016 Jones. This study not only demonstrates the opportunity to construct new‐generation transparent electronics based on 1D metal oxide nanowires but also sheds new light on how to further decrease the annealing temperature of metal oxide nanowire devices for low‐temperature fabrication processes. [ABSTRACT FROM AUTHOR]

One-dimensional metal-oxides (1D-MO) nanostructure has been regarded as one of the most promising candidates for high-performance photodetectors due to their outstanding electronic properties, low-cost and environmental stability. However, the current bottlenecks are high energy consumption and relatively low sensitivity. Here, Schottky junctions between nanotubes (NTs) and FTO were fabricated by electrospinning SnO2 NTs on FTO glass substrate, and the bias voltage of SnO2 NTs photodetectors was as low as ∼1.76 V, which can effectively reduce energy consumption. Additionally, for improving the response and recovery speed of SnO2 NTs photodetectors, the NTs were covered with organic/inorganic hybrid perovskite. SnO2 NTs/perovskite heterostructure photodetectors exhibit fast response/recovery speed (∼0.075/0.04 s), and a wide optical response range (∼220–800 nm). At the same time, the bias voltage of heterostructure photodetectors was further reduced to 0.42 V. The outstanding performance is mainly attributed to the formation of type-II heterojunctions between SnO2 NTs and perovskite, which can facilitate the separation of photogenerated carriers, as well as Schottky junction between SnO2 NTs and FTO, which reduce the bias voltage. All the results indicate that the rational design of 1D-MO/perovskite heterostructure is a facile and efficient way to achieve high-performance photodetectors. [ABSTRACT FROM AUTHOR]

Lithium–sulfur batteries (LSBs) have shown great potential for application in high-density energy storage systems. However, the performance of LSBs is severely hindered by the shuttle effect and the sluggish reaction kinetics of lithium polysulfides (LiPSs). Here, a Janus Fe3C/N-CNF@RGO electrode consisting of a 1D Fe3C-decorated N-doped carbon nanofibers (Fe3C/N-CNFs) side and a 2D reduced graphene oxide (RGO) side was applied as a free-standing carrier for the Li2S6 catholyte to improve the overall electrochemical performance of LSBs. The Fe3C/N-CNF layer endows the cathode with strong chemisorption abilities for LiPSs and accelerated the redox kinetics via catalyzing the conversion of LiPSs. The 2D RGO sheets serve as a microscopic physical barrier and further resist the shuttling of LiPSs. Like a hunter's trap, behind the trap lies a net. Moreover, the 3D hierarchical conductive network based on 1D N-CNF and 2D RGO sheets enables fast electron transfer. Based on the synergetic effects of chemical immobilization, catalytic abilities, and a physical barrier in a 3D conductive network, LSBs with optimal Fe3C/N-CNF@RGO electrodes exhibit robust long-term cycling stability (a decay rate of only 0.0089% per cycle at 0.5C for 300 cycles), superior rate capabilities (821.7 mA h g−1 at 2.0C), and stable cycling performance at high sulfur loading (6.29 mg cm−2). This work defines an emerging viewpoint relating to the design of novel sulfur carriers with multiple synergistic effects for application in LSBs. [ABSTRACT FROM AUTHOR]

One-dimensional nanostructured SnO2 has attracted intense research interest due to its advantageous properties, including a large surface-to-volume ratio, high optical transparency and typical n-type properties. However, how to fabricate high-performance and multifunctional electronic devices based on 1D nanostructured SnO2 via low-cost and efficient preparation techniques is still a huge challenge. In this work, a low-cost, one-step electrospun technology was employed to synthesize the SnO2 nanofiber (NF) and nanotube (NT) arrays. The electrical and photoelectrical parameters of SnO2 NTs-based devices were effectively controlled through simple changes to the amount of Sn in the precursor solution. The optimal 0.2 SnO2 NTs-based field effect transistors (FETs) with 0.2 g SnCl2*4H2O per 5 ml in the precursor solution exhibit a high saturation current (∼9 × 10−5 A) and a large on/off ratio exceeding 2.4 × 106. Additionally, 0.2 SnO2 NTs-based FET also exhibit a narrowband deep-UV photodetectivity (240–320 nm), including an ultra-high photocurrent of 307 μA, a high photosensitivity of 2003, responsibility of 214 A W−1 and detectivity of 2.19 × 1013 Jones. Furthermore, the SnO2 NTs-based transparent photodetectors were as well be integrated with fluorine-doped tin oxide glass and demonstrated a high optical transparency and photosensitivity (∼199). All these results elucidate the significant advantages of these electrospun SnO2 NTs for next-generation multifunctional electronics and transparent photonics. [ABSTRACT FROM AUTHOR]

One-dimensional metal-oxides (1D-MO) nanostructure has been regarded as one of the most promising candidates for high-performance photodetectors due to their outstanding electronic properties, low-cost and environmental stability. However, the current bottlenecks are high energy consumption and relatively low sensitivity. Here, Schottky junctions between nanotubes (NTs) and FTO were fabricated by electrospinning SnO 2 NTs on FTO glass substrate, and the bias voltage of SnO 2 NTs photodetectors was as low as ∼1.76 V, which can effectively reduce energy consumption. Additionally, for improving the response and recovery speed of SnO 2 NTs photodetectors, the NTs were covered with organic/inorganic hybrid perovskite. SnO 2 NTs/perovskite heterostructure photodetectors exhibit fast response/recovery speed (∼0.075/0.04 s), and a wide optical response range (∼220-800 nm). At the same time, the bias voltage of heterostructure photodetectors was further reduced to 0.42 V. The outstanding performance is mainly attributed to the formation of type-II heterojunctions between SnO 2 NTs and perovskite, which can facilitate the separation of photogenerated carriers, as well as Schottky junction between SnO 2 NTs and FTO, which reduce the bias voltage. All the results indicate that the rational design of 1D-MO/perovskite heterostructure is a facile and efficient way to achieve high-performance photodetectors., (© 2021 IOP Publishing Ltd.)

One-dimensional nanostructured SnO 2 has attracted intense research interest due to its advantageous properties, including a large surface-to-volume ratio, high optical transparency and typical n-type properties. However, how to fabricate high-performance and multifunctional electronic devices based on 1D nanostructured SnO 2 via low-cost and efficient preparation techniques is still a huge challenge. In this work, a low-cost, one-step electrospun technology was employed to synthesize the SnO 2 nanofiber (NF) and nanotube (NT) arrays. The electrical and photoelectrical parameters of SnO 2 NTs-based devices were effectively controlled through simple changes to the amount of Sn in the precursor solution. The optimal 0.2 SnO 2 NTs-based field effect transistors (FETs) with 0.2 g SnCl 2 *4H 2 O per 5 ml in the precursor solution exhibit a high saturation current (∼9 × 10 -5 A) and a large on/off ratio exceeding 2.4 × 10 6 . Additionally, 0.2 SnO 2 NTs-based FET also exhibit a narrowband deep-UV photodetectivity (240-320 nm), including an ultra-high photocurrent of 307 μA, a high photosensitivity of 2003, responsibility of 214 A W -1 and detectivity of 2.19 × 10 13 Jones. Furthermore, the SnO 2 NTs-based transparent photodetectors were as well be integrated with fluorine-doped tin oxide glass and demonstrated a high optical transparency and photosensitivity (∼199). All these results elucidate the significant advantages of these electrospun SnO 2 NTs for next-generation multifunctional electronics and transparent photonics.

Background/aims: The prognostic value of age on patients with gastric cancer is not well defined. The aim of this retrospective study is to analyze the impact of age on survival in patients with gastric cancer., Methodology: A total of 1800 patients with gastric carcinoma, who had undergone gastrectomy between 1997-2007 years were included. They were divided into six different age groups (21-30, 31-40, 41-50, 51- 60, 61-70 and 71-80 years). We reviewed patient's clinico-pathological characteristics and the prognosis with special reference to their ages., Results: Among the six age groups, the younger patients have more female-dominated patients and poorly differentiated carcinoma, whereas the older patients have a higher incidence of large tumors (≥5 cm) and more patients with stage T3. Moreover, there were more liver metastases in the older age groups. Univariate analysis showed that there were significant differences in 5-year survival rates among the six age groups. Multivariate analysis confirmed age, tumor size, pT stage, pN stage and curability were independent prognostic factors., Conclusion: There are several distinctive properties related to age of patients with gastric cancer, the older patients have more aggressive features and poorer prognosis than the younger patients.

The prognostic value of histological types in gastric cancer is not well defined. This study aims to clarify the clinicopathologic features of various WHO histological types and their prognostic significance in advanced gastric cancer (AGC). We retrospectively reviewed 741 patients with gastric cancer in our hospital from 1997 to 2007. The AGC (741 cases) were divided into five histological types: well-differentiated carcinoma (WD), moderately differentiated carcinoma (MD), poorly differentiated carcinoma (PD), mucinous carcinoma (MC), and signet ring cell carcinoma (SRC). The various AGC histological types presented significant differences in their clinical and tumor features. The five-year survival rates of patients with WD, MD, PD, MC, and SRC were 87.1%, 57.1%, 50.6%, 62.7%, and 43.4%, respectively (P=0.012). Multivariate analysis showed that cell differentiation, age, depth of invasion, and lymph node metastasis were independent prognostic factors in AGC, whereas MC and SRC were not. Cell differentiation is related to tumor aggression or patient stage. Advanced stage SRC carcinoma had more aggressive features and worse prognosis than the other types. MC carcinoma survival is correlated with the stage at diagnosis. The degree of cell differentiation is an important predictor of survival in AGC.