Institution
Hong Kong Polytechnic University
Education•Hong Kong, China•
About: Hong Kong Polytechnic University is a education organization based out in Hong Kong, China. It is known for research contribution in the topics: Tourism & Population. The organization has 29633 authors who have published 72136 publications receiving 1956312 citations. The organization is also known as: HKPU & PolyU.
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TL;DR: The layered structure of nitrogen-doped graphene quantum dots (N-GQDs) is reported which possess broadband emission ranging from 300 to >1000 nm and a broadband photodetector with responsivity as high as 325 V/W is demonstrated by coating N-GZDs onto interdigital gold electrodes.
Abstract: Material that can emit broad spectral wavelengths covering deep ultraviolet, visible, and near-infrared is highly desirable. It can lead to important applications such as broadband modulators, photodetectors, solar cells, bioimaging, and fiber communications. However, there is currently no material that meets such desirable requirement. Here, we report the layered structure of nitrogen-doped graphene quantum dots (N-GQDs) which possess broadband emission ranging from 300 to >1000 nm. The broadband emission is attributed to the layered structure of the N-GQDs that contains a large conjugated system and provides extensive delocalized π electrons. In addition, a broadband photodetector with responsivity as high as 325 V/W is demonstrated by coating N-GQDs onto interdigital gold electrodes. The unusual negative photocurrent is observed which is attributed to the trapping sites induced by the self-passivated surface states in the N-GQDs.
444 citations
The Chinese University of Hong Kong1, City University of Hong Kong2, University of Macau3, Simón Bolívar University4, University of Tokyo5, University of Osnabrück6, California State University, Chico7, University of Vienna8, Katholieke Universiteit Leuven9, University of Alberta10, University of Guelph11, Chinese Academy of Sciences12, Academy of Sciences of the Czech Republic13, Charles University in Prague14, Pedagogical University15, Åbo Akademi University16, University of Lyon17, Tbilisi State University18, International University, Cambodia19, Hong Kong Polytechnic University20, Hungarian Academy of Sciences21, National and Kapodistrian University of Athens22, University of Delhi23, Indian Statistical Institute24, Indian Institute of Management Ahmedabad25, Padjadjaran University26, University of Haifa27, University of Padua28, Seowon University29, University of Latvia30, American University of Beirut31, Universiti Sains Malaysia32, Universiti Malaysia Sabah33, Tilburg University34, Victoria University of Wellington35, University of Lagos36, University of Bergen37, University of Peshawar38, University of the Philippines39, University of Porto40, University of Minho41, Russian Academy of Sciences42, University of Cape Town43, Autonomous University of Madrid44, National Taiwan University45, Assumption University46, Boğaziçi University47, University College London48, University of Greenwich49
TL;DR: Leung et al. as mentioned in this paper revealed a five-dimensional structure of social axioms across individuals from five cultural groups across 41 nations and revealed the culture level factor structure and its correlates across 41 cultures.
Abstract: Leung and colleagues have revealed a five-dimensional structure of social axioms across individuals from five cultural groups. The present research was designed to reveal the culture level factor structure of social axioms and its correlates across 41 nations. An ecological factor analysis on the 60 items of the Social Axioms Survey extracted two factors: Dynamic Externality correlates with value measures tapping collectivism, hierarchy, and conservatism and with national indices indicative of lower social development. Societal Cynicism is less strongly and broadly correlated with previous values measures or other national indices and seems to define a novel cultural syndrome. Its national correlates suggest that it taps the cognitive component of a cultural constellation labeled maleficence, a cultural syndrome associated with a general mistrust of social systems and other people. Discussion focused on the meaning of these national level factors of beliefs and on their relationships with individual level factors of belief derived from the same data set.
443 citations
TL;DR: In this article, a review of early transition metal carbides and/or nitrides has been presented, highlighting their potential applications in catalysis, sensors and adsorption, and how they could be considered as ideal adsorbents due to the advantages of large surface area and abundant active sites.
443 citations
TL;DR: In this paper, the pyrolysis dependent properties of rapeseed stem biochar were investigated under various temperatures (200-700°C, in 50°C intervals), heating rates (1, 5, 10, 15, 20, 20°C/min), and residence times (10,20, 40, 60, 80, 100min).
442 citations
TL;DR: A detailed review of the advancements made in the design of flexible battery components: the metal electrode, the electrolyte membrane, and the air electrode can be found in this paper, where the effects of operating conditions on battery performance characteristics and durabilities are discussed, including the effect of the operating temperature and the contaminants commonly encountered in ambient air.
Abstract: The demand for flexible power sources with high energy density and durability has increased rapidly with the development of flexible and wearable electronic devices. Metal–air batteries are considered as the most promising candidates for these applications due to their excellent theoretical energy densities. In particular, rechargeable zinc–air and lithium–air batteries have attracted much attention because of their potential to offer high energy density while maintaining a long operational life. Although significant progress has been made in enhancing the electrochemical performance of these batteries, many technical challenges still remain to achieve the mechanical flexibility required for wearable electronic devices while maintaining high performance. This article describes the most recent advances and challenges in the development of flexible zinc–air and lithium–air batteries. We start with an overview of the latest innovations in the exploration of various battery configurations to effectively accommodate stresses and strains associated with the use of flexible electronic devices. This is followed by a detailed review of the advancements made in the design of flexible battery components: the metal electrode, the electrolyte membrane, and the air electrode. Furthermore, the effects of operating conditions on battery performance characteristics and durabilities are discussed, including the effect of the operating temperature and the contaminants commonly encountered in ambient air (e.g., carbon dioxide and moisture). Finally, challenges facing the development of a new generation of flexible metal–air batteries are highlighted, together with further research directions and perspectives.
442 citations
Authors
Showing all 30115 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Jing Wang | 184 | 4046 | 202769 |
| Xiang Zhang | 154 | 1733 | 117576 |
| Wei Zheng | 151 | 1929 | 120209 |
| Rui Zhang | 151 | 2625 | 107917 |
| Jian Yang | 142 | 1818 | 111166 |
| Joseph Lau | 140 | 1048 | 99305 |
| Yu Huang | 136 | 1492 | 89209 |
| Dacheng Tao | 133 | 1362 | 68263 |
| Chuan He | 130 | 584 | 66438 |
| Lei Zhang | 130 | 2312 | 86950 |
| Ming-Hsuan Yang | 127 | 635 | 75091 |
| Chao Zhang | 127 | 3119 | 84711 |
| Yuri S. Kivshar | 126 | 1845 | 79415 |
| Bin Wang | 126 | 2226 | 74364 |
| Chi-Ming Che | 121 | 1305 | 62800 |