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ZnO/ZnFe2O4 nanocomposite-based electrochemical nanosensors for the detection of furazolidone in pork and shrimp samples: exploring the role of crystallinity, phase ratio, and heterojunction formation

2022-01-01T00:00:00Z

ZnO/ZnFe2O4 nanocomposite-based electrochemical nanosensors for the detection of furazolidone in pork and shrimp samples: exploring the role of crystallinity, phase ratio, and heterojunction formation

2022-01-01T00:00:00Z

Title: ZnO/ZnFe2O4 nanocomposite-based electrochemical nanosensors for the detection of furazolidone in pork and shrimp samples: exploring the role of crystallinity, phase ratio, and heterojunction formation Authors: Nguyen, Tuan Anh; Nguyen, Ngoc Huyen; Ngo, Xuan Dinh; Le, Khanh Vinh; Le, Minh Tung; Nguyen, Thanh Vinh; Nguyen, Van Quy; Vu, Dinh Lam; Le, Anh Tuan Abstract: In this study, we have investigated the influence of crystallinity, phase ratio, and heterojunction formation on the sensing performance of ZnO/ZnFe2O4 (ZnO/ZFO) nanocomposite-based electrochemical sensors for the detection of furazolidone (FZD) antibiotic drug. Results obtained show that the crystallinity and phase ratio of ZnO/ZFO nanocomposites have decisive effects on their electron transfer and active site density. Tuning the crystallinity and ZnO content of ZnO/ZFO nanocomposites is an effective way to enhance the FZD electrochemical sensing performance. Findings from this research suggested that the formation of ZnO/ZFO heterojunction could significantly improve their electrochemical responses for FZD due to arising of the internal electric field and redistribution of Zn2+, Fe3+ cations. Under optimized conditions, the ZnO/ZFO-2-based FZD electrochemical sensor reached an electrochemical sensitivity of 0.78 μA μM−1 cm−2 with a LOD of 0.65 μM in the detection range of 1–100 μM. In addition, all these ZnO/ZFO nanocomposites-based electrochemical sensors offer satisfactory repeatability, selectivity, long-term stability, and practical feasibility in pork and shrimp samples. The insights obtained will benefit the future design of ZnFe2O4 nanomaterial-based high-performance electrochemical sensors for monitoring residual antibiotics in real food samples

“X-site aliovalent substitution decoupled charge and phonon transports in XYZ half-Heusler thermoelectrics”, Acta Materialia 166 (2019) 650-657.

Title: “X-site aliovalent substitution decoupled charge and phonon transports in XYZ half-Heusler thermoelectrics”, Acta Materialia 166 (2019) 650-657. Authors: Nguyen Van Du

Willingness to receive COVID-19 vaccine booster doses for adults and their children in Vietnam

2022-01-01T00:00:00Z

Title: Willingness to receive COVID-19 vaccine booster doses for adults and their children in Vietnam Authors: Chu, Dinh Toi; Vu, Thi Hue; Nguyen, Thi Yen Vy; Nguyen, Mai Anh; Bui, Nhat Le; Hoang, Van Thuan Abstract: This study describes the willingness of receiving the COVID-19 booster doses for adults and their children 12–17 years old, and its related factors in Vietnam. A cross-sectional study was conducted through a national online survey from November 17 to November 24, 2021 using Google Form. Study respondents were Vietnamese citizens who were ≥18 years old and currently living in Vietnam. A total of 900 complete responses were analyzed and of those 93.77% were willingness to receive the booster dose. Participants with a university degree or higher were 8.16 times higher in willingness than those with primary school (p = .017). Those who received the first or the second dose of the COVID-19 vaccine were 5.85 (p = .001) and 5.65 (p < 0.001) times higher in willingness to receive booster doses, respectively. About the willingness to receive the COVID-19 vaccine for children 12–17 years, 89.2% of the participants were willing to have their children get the vaccine. Participants who had the first or the second dose of the COVID-19 vaccine had a 4.15 (p = .001) and 3.91 (p < 0.001) times higher willingness, respectively. Thus, the rate of willingness to receive the booster doses and the COVID-19 vaccine to children were excellent in this study. Both the education level and COVID-19 vaccination history were two positively associated factors.