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document
Li, Z. (author), Nedeljković, M. (author), Chen, B. (author), Ye, G. (author)
This study investigates the effectiveness of metakaolin (MK)in mitigating the autogenous shrinkage of alkali-activated slag (AAS). It is found that the autogenous shrinkage of AAS paste can be reduced by 40% and 50% when replacing 10% and 20% slag with MK, respectively. By providing additional Si and Al, and decreasing the pH of the pore...
journal article 2019
document
Li, Z. (author), Zhang, S. (author), Zuo, Y. (author), Chen, Wei (author), Ye, G. (author)
Chemical deformation (chemical shrinkage/expansion), the absolute volume change during reactions, is a key parameter influencing the volume stability, especially the autogenous deformation of a binder material. This work, for the first time, reports an in-depth investigation on the chemical deformation of metakaolin based geopolymer (MKG)....
journal article 2019
document
Chen, J. (author), Ye, G. (author)
Cracking is inevitable during the service period of concrete structures. They are preferential ingression channels for aggressive ions. It is difficult or even impossible to repair all the cracks due to the limitation of practical conditions. However, cracks have potentials to self-heal due to further hydration and carbonization. The effect of...
journal article 2019
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Ye, H. (author), Hu, F.F. (author), Tang, H. (author), Yang, L.W. (author), Chen, X.P. (author), Wang, L.G. (author), Zhang, G.Q. (author)
In this work, the structural, electronic and optical properties of germanene and ZnSe substrate nanocomposites have been investigated using first-principles calculations. We found that the large direct-gap ZnSe semiconductors and zero-gap germanene form a typical orbital hybridization heterostructure with a strong binding energy, which shows...
journal article 2018
document
Yang, Huiru (author), Wang, Zeping (author), Ye, H. (author), Zhang, Kai (author), Chen, X. (author), Zhang, G.Q. (author)
Sensitive materials for formaldehyde (HCHO) sensor need high sensitivity and selectivity. The research on two dimensional (2D) sensitive material is growing, and most studies focus on the pristine or modified graphene. So it is essential to introduce other 2D materials into HCHO gas sensor. In this report, the adsorption behaviors of organic...
journal article 2018
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Tang, H. (author), Ye, Huai-Yu (author), Chen, Xian-Ping (author), Qian, Cheng (author), Fan, Xue-Jun (author), Zhang, G.Q. (author)
In this paper, the heat transfer performance of the multi-chip (MC) LED module is investigated numerically by using a general analytical solution. The configuration of the module is optimized with genetic algorithm (GA) combined with a response surface methodology. The space between chips, the thickness of the metal core printed circuit board...
journal article 2017
document
Hu, Fa-Fei (author), Tang, H. (author), Ye, H. (author), Chen, X. (author), Zhang, G.Q. (author)
The sensing behavior of monolayer tin sulfide (SnS) for four gas molecules (NH<sub>3</sub>, NO<sub>2</sub>, CO, and H<sub>2</sub>O) are studied by the first-principle calculation based on density-functional theory. We calculate adsorption energy, adsorption distance, and Hirshfeld charge to estimate the adsorption ability of monolayer SnS for...
journal article 2017
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Tang, H. (author), Ye, H. (author), Wong, K.Y. (author), Leung, Stanley Y.Y. (author), Fan, Jiajie (author), Chen, Xianping (author), Fan, Xuejun (author), Zhang, G.Q. (author)
The objective of this study is to quantitatively evaluate the impacts of LED components on the overdriving reliability of high power white LED chip scale packages (CSPs). The reliability tests under room temperature are conducted over 1000 h in this study on CSP LEDs with overdriving currents. A novel method is proposed to investigate the...
journal article 2017
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Ye, H. (author), Leung, Stanley Y.Y. (author), Wong, K.Y. (author), Chen, Xianping (author), Lin, Kai (author), Fan, J. (author), Kjelstrup, Signe (author), Fan, Xuejun (author), Zhang, G.Q. (author)
Using the analogue of the electric inductance, we reveal the properties of the thermal inductance in GaN-based light-emitting diode devices by testing their transient thermal behaviors. We find that the devices exhibit a transient thermal response under step-down or step-up currents and observe notable inductive phenomena of the temperature...
journal article 2016
document
Chen, Xianping (author), Ye, H. (author), Fan, Xuejun (author), Ren, Tianling (author), Zhang, G.Q. (author)
Heat pipes (HPs) have received considerable attention in recent decades, especially in the field of cooling electronics, which requires the removal of added heat from an area of limited volume to the environment. Small HPs are widely used in electronic applications, which are normally limited by the compact structure and dimensions of the...
journal article 2016
document
Chen, X.P. (author), Jiang, J.K. (author), Liang, Q.H. (author), Yang, N. (author), Ye, H.Y. (author), Cai, M. (author), Shen, L. (author), Yang, D.G. (author), Ren, T.L. (author)
We present a first-principles density functional theory study focused on how the chemical and electronic properties of polyaniline are adjusted by introducing suitable substituents on a polymer backbone. Analyses of the obtained energy barriers, reaction energies and minimum energy paths indicate that the chemical reactivity of the polyaniline...
journal article 2015
document
Khaliq, J. (author), Li, C. (author), Chen, K. (author), Shi, B. (author), Ye, H. (author), Grande, A.M. (author), Yan, H. (author), Reece, M.J. (author)
The effect of substitution and oxidation-reduction on the thermal conductivity of perovskite-like layered structure (PLS) ceramics was investigated in relation to mass contrast and non-stoichiometry. Sr (acceptor) was substituted on the A site, while Ta (donor) was substituted on the B site of La2Ti2O7. Substitution in PLS materials creates...
journal article 2015
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