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Start Over Author "Jiang, Qi" Publication Type Academic Journals
3,414 results on '"Jiang, Qi"'

6. Room-temperature spin injection across a chiral perovskite/III–V interface

Author

Hautzinger, Matthew P., Pan, Xin, Hayden, Steven C., Ye, Jiselle Y., Jiang, Qi, Wilson, Mickey J., Phillips, Alan J., Dong, Yifan, Raulerson, Emily K., Leahy, Ian A., Jiang, Chun-Sheng, Blackburn, Jeffrey L., Luther, Joseph M., Lu, Yuan, Jungjohann, Katherine, Vardeny, Z. Valy, Berry, Joseph J., Alberi, Kirstin, and Beard, Matthew C.

Published
2024
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20. Comparison of percutaneous microwave/radiofrequency ablation liver partition and portal vein embolization versus transarterial chemoembolization and portal vein embolization for planned hepatectomy with insufficient future liver remnant

Author

Ye, Tai-Wei, Fu, Tian-Wei, Du, Cheng-Fei, Yue, Ru-Chi, Jiang, Qi-Tao, Zhong, Zhi-Hang, Zhao, Qin, Zhang, Cheng-Wu, Liu, Jie, Liu, Jun-Wei, Luo, Zu-Yan, Fan, Xiao-Ming, Hong, De-Fei, Cheng, Jian, and Xiao, Zun-Qiang

Published
2024
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30. Emergence of quantum confinement in topological kagome superconductor CsV3Sb5

Author

Cai, Yongqing, Wang, Yuan, Hao, Zhanyang, Liu, Yixuan, Sui, Xuelei, Liang, Zuowei, Ma, Xiao-Ming, Zhang, Fayuan, Shen, Zecheng, Zhang, Chengcheng, Jiang, Zhicheng, Yang, Yichen, Liu, Wanling, Jiang, Qi, Liu, Zhengtai, Ye, Mao, Shen, Dawei, Gao, Han, Xiao, Hanbo, Liu, Zhongkai, Sun, Zhe, Liu, Yi, Cui, Shengtao, Chen, Jiabin, Wang, Le, Liu, Cai, Lin, Junhao, Huang, Bing, Wang, Zhenyu, Chen, Xianhui, Mei, Jia-Wei, Wang, Jianfeng, and Chen, Chaoyu

Published
2024
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45. Mapping the pathways of photo-induced ion migration in organic-inorganic hybrid halide perovskites

Author

Kim, Taeyong, Park, Soyeon, Iyer, Vasudevan, Shaheen, Basamat, Choudhry, Usama, Jiang, Qi, Eichman, Gage, Gnabasik, Ryan, Kelley, Kyle, Lawrie, Benjamin, Zhu, Kai, and Liao, Bolin

Subjects
Affordable and Clean Energy
Abstract

Organic-inorganic hybrid perovskites exhibiting exceptional photovoltaic and optoelectronic properties are of fundamental and practical interest, owing to their tunability and low manufacturing cost. For practical applications, however, challenges such as material instability and the photocurrent hysteresis occurring in perovskite solar cells under light exposure need to be understood and addressed. While extensive investigations have suggested that ion migration is a plausible origin of these detrimental effects, detailed understanding of the ion migration pathways remains elusive. Here, we report the characterization of photo-induced ion migration in perovskites using in situ laser illumination inside a scanning electron microscope, coupled with secondary electron imaging, energy-dispersive X-ray spectroscopy and cathodoluminescence with varying primary electron energies. Using methylammonium lead iodide and formamidinium lead iodide as model systems, we observed photo-induced long-range migration of halide ions over hundreds of micrometers and elucidated the transport pathways of various ions both near the surface and inside the bulk of the samples, including a surprising finding of the vertical migration of lead ions. Our study provides insights into ion migration processes in perovskites that can aid perovskite material design and processing in future applications.

Published
2023

46. Integrated halide perovskite photoelectrochemical cells with solar-driven water-splitting efficiency of 20.8%

Author

Fehr, Austin MK, Agrawal, Ayush, Mandani, Faiz, Conrad, Christian L, Jiang, Qi, Park, So Yeon, Alley, Olivia, Li, Bor, Sidhik, Siraj, Metcalf, Isaac, Botello, Christopher, Young, James L, Even, Jacky, Blancon, Jean Christophe, Deutsch, Todd G, Zhu, Kai, Albrecht, Steve, Toma, Francesca M, Wong, Michael, and Mohite, Aditya D

Subjects
Affordable and Clean Energy
Abstract

Achieving high solar-to-hydrogen (STH) efficiency concomitant with long-term durability using low-cost, scalable photo-absorbers is a long-standing challenge. Here we report the design and fabrication of a conductive adhesive-barrier (CAB) that translates >99% of photoelectric power to chemical reactions. The CAB enables halide perovskite-based photoelectrochemical cells with two different architectures that exhibit record STH efficiencies. The first, a co-planar photocathode-photoanode architecture, achieved an STH efficiency of 13.4% and 16.3 h to t60, solely limited by the hygroscopic hole transport layer in the n-i-p device. The second was formed using a monolithic stacked silicon-perovskite tandem, with a peak STH efficiency of 20.8% and 102 h of continuous operation before t60 under AM 1.5G illumination. These advances will lead to efficient, durable, and low-cost solar-driven water-splitting technology with multifunctional barriers.

Published
2023

49. Postnatal mental health, breastfeeding beliefs, and breastfeeding practices in rural China.

Author

Zhang, Evelyn, Cohen, Nourya, Ohtori, Mika, Zhu, Sabrina, Guo, Yian, Johnstone, Hannah, Dill, Sarah-Eve, Zhou, Huan, Rozelle, Scott, and Jiang, Qi

Subjects
Anxiety, Breastfeeding, Breastfeeding attitude, Breastfeeding self-efficacy, Depression, Mental health, Rural China, Stress, Breast Feeding, China, Cross-Sectional Studies, Female, Humans, Infant, Mental Health, Rural Population
Abstract

BACKGROUND: The importance of breastfeeding in low- and middle- income countries is well recognized, yet the importance of postnatal mental health on breastfeeding practices and beliefs in these settings has been understudied. This study investigates the associations between maternal mental health problems, breastfeeding beliefs and breastfeeding practices in rural China. METHODS: Cross-sectional data were collected in November and December 2019 from 742 mothers of infants under 6 months old in rural Sichuan Province, China. Maternal mental health (depression, anxiety, and stress symptoms) was assessed using the Depression, Anxiety, and Stress Scale (short form). Breastfeeding beliefs were assessed using the Iowa Infant Feeding Attitude Scale and Breastfeeding Self-Efficacy Scale (short form). Breastfeeding practices were assessed through a 24-h dietary recall questionnaire. Ordinary least squares regression, multiple logistic regression and heterogeneous effects analyses were used to identify associations between symptoms of mental health problems and breastfeeding outcomes. RESULTS: The average age of sample infants was 2.7 months. Among mothers, 13% showed symptoms of depression, 16% anxiety, and 9% stress. The prevalence of exclusive breastfeeding in the previous 24 h was 38.0%. Depression symptoms were significantly associated with breastfeeding attitude (?= - 1.11, 95% CI: - 2.07, - 0.14) and breastfeeding self-efficacy (?= - 3.19, 95% CI: - 4.93, - 1.45). Anxiety and stress symptoms were significantly associated with breastfeeding self-efficacy (?= - 1.81, 95% CI: - 3.43, - 0.18 and ? = - 2.88, 95% CI: - 4.98, - 0.78, respectively). There were no significant associations between symptoms of mental health problems and exclusive breastfeeding. The heterogeneous effects analyses revealed that less educated mothers with symptoms of stress had lower odds of exclusive breastfeeding than educated mothers without symptoms of stress (OR: 0.53, 95% CI: 0.25,1.10). Mothers of younger infants had higher odds of exclusive breastfeeding than the mother of older infants, regardless of depression, anxiety, or stress symptoms. CONCLUSION: Symptoms of maternal mental health problems are significantly associated with breastfeeding attitude and self-efficacy; however, these symptoms are not associated with breastfeeding practices. Maternal educational level and infant age may play a role in mothers breastfeeding practices. To improve breastfeeding practices, interventions should employ a multi-dimensional approach that focuses on improving maternal mental well-being and considers demographic characteristics.

Published
2022

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