Yong Zhou

Hubei Normal University, Khuanshi, Hubei, China

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Publications (3)6.09 Total impact

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    ABSTRACT: Na-substituted BiFeO3 films were prepared on FTO/glass substrates using the sol–gel method. XRD results showed that all films adopted random orientation and an R3m perovskite structure. UV–Vis absorption results indicated that the films exhibited intense absorbance around 450 nm. The band gaps were 2.59 eV, 2.63 eV, 2.62 eV and 2.52 eV for the films substituted with 0%, 5%, 10% and 20% Na, respectively. A substantially enhanced photovoltaic effect was observed in the 20% Na substituted BiFeO3 film; its short-circuit current density was 1.26 µA cm−2 and the open circuit voltage was −0.66 V. Meanwhile, polarization-modulated Jsc and Voc were observed in the 20% Na substituted BiFeO3 film and the mechanism was studied using the Schottky barrier combined with the ferroelectric polarization model.
    Journal of Physics D Applied Physics 08/2014; 47(35):355104. · 2.52 Impact Factor
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    ABSTRACT: Highly preferentially oriented polycrystalline BiFeO3 thin film was grown on FTO/glass substrate by a sol–gel method annealed at 500 °C. XRD result showed that the film adopts highly (100) preferential orientation. SEM results indicate that the film is composed of large grains of 40–200 nm and the thickness is about 320 nm. Room temperature saturated polarization and large Pr ~55 μC/cm2 were obtained. Leakage current was substantially reduced by the controlling of ferroelectric polarization. Polarization-modulated conduction mechanism was studied. Moreover, substantial photovoltaic effect was observed.
    Journal of Sol-Gel Science and Technology 06/2013; 66(3). · 1.55 Impact Factor
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    ABSTRACT: Aim:  The aim of the study was to analyze the prevalence and characteristics of secondary diabetes induced by 5-Fluorouracil (5-FU)-based chemotherapy in non-diabetic patients with colorectal cancer (CRC). Method:  422 consecutive CRC patients who received 5-FU-based chemotherapy were retrospective analyzed. Fasting plasma glucose (FPG) levels were determined before each cycle of chemotherapy during active treatment and regular follow-up. The prevalence and characteristics of secondary hyperglycemia were investigated, with special focus on the clinical outcome Results:  Among the 422 CRC patients, 60 had pre-existing hyperglycemia. In the remaining 362 with normal FPG levels before chemotherapy, 42 (11.6%) and 41 (11.3%) patients developed diabetes and impaired fasting glucose (IFG) during the study period. Among the 42 secondary diabetic patients, 22 (52.4%) received anti-diabetes drug therapy, in 7 (16.7%) cases the FPG level returned to normal without any active intervention, and 13 (30.9%) cases received diet control and physiotherapy. Thirty one (8.6%) patients developed diabetes. Based on Common Terminology Criteria for Adverse Events (CTCAE) criteria, an adverse effect (AE) over Grade 3 occurred in seven cases during follow-up. Diabetes-related AE had a serious negative impact on chemotherapy in six cases. Diabetes-related death occurred in three patients. Conclusions:  Secondary diabetes associated with 5-FU-based chemotherapy occurs in around 10% of CRC patients, with a significant negative impact on treatment and clinical outcome. 5-FU-related diabetes should be regarded as a common side effect of 5-FU treatment. © 2012 The Authors Colorectal Disease © 2012 The Association of Coloproctology of Great Britain and Ireland.
    Colorectal Disease 05/2012; · 2.02 Impact Factor