Mitigating initial capacity loss for practical lithium-ion battery by Cao, Shengkai

“…While numerous promising anode materials with optimized electrochemical performance, such as fast-charging capability and long-term stability have been developed, they still suffer from low initial Coulombic efficiency (ICE) due to solid electrolyte interphase (SEI) formation and lithium trapping, which impede their commercialization. In this thesis, new insights and strategies for the two mechanisms leading to initial capacity loss (ICL) based on different type of anode materials were investigated.…”
Get full text

Robotic manipulation of microscopic objects using multiple laser-driven fingertips by Quang, Minh Ta

“…In the research, multiple optically trapped micro-beads are first utilized as the laser-driven fingertips, and several control techniques will then be explored to achieve various manipulation tasks, which are beyond the capability of manipulation using single optical trapping. …”
Get full text

Pseudospin dynamics in multimode polaritonic Josephson junctions by Pavlovic, G., Malpuech, G., Shelykh, Ivan A.

“…In particular, it can lead to renormalization of the oscillation frequency, appearance of higher order harmonics, and induce transition between the regimes of free Josephson oscillations and macroscopic quantum self-trapping.…”
Get full text
Get full text

Synthesis, characterization, and bipolar transporting behavior of a new twisted polycyclic aromatic hydrocarbon: 1′,4′-Diphenyl-naphtho-(2′.3′:1.2)-pyrene-6′-nitro-7′-methyl carbox... by Zhang, Qichun, Divayana, Yoga, Xiao, Jinchong, Wang, Zhijuan, Tiekink, Edward R. T., Doung, Hieu M., Zhang, Hua, Boey, Freddy Yin Chiang, Sun, Xiaowei, Wudl, Fred

“…An asymmetric twistacene, 1′,4′-diphenyl-naphtho-(2′.3′:1.2)-pyrene-6′-nitro-7′-methyl carboxylate (tetracene 2), was synthesized by using benzyne-trapping chemistry. Its structure, determined by X-ray crystallography, confirmed that this material has a twisted topology with torsion angles as high as 23.8(3)°. …”
Get full text
Get full text

Preparation of MoS2-polyvinylpyrrolidone nanocomposites for flexible nonvolatile rewritable memory devices with reduced graphene oxide electrodes by Liu, Juqing, Zeng, Zhiyuan, Cao, Xiehong, Lu, Gang, Wang, Lianhui, Fan, Qu-Li, Huang, Wei, Zhang, Hua

“…These experimental results prove that the electrical transition is due to the charge trapping and detrapping behavior of MoS2 in the PVP dielectric material. …”
Get full text
Get full text

Effective small organic molecule as a defect passivator for highly efficient quasi-2D perovskite light-emitting diodes by Li, Y, Li, F, Yu, Z, Tamilavan, V, Oh, C-M, Jeong, WH, Shen, X, Lee, S, Du, X, Yang, E, Ahn, Y, Hwang, I-W, Lee, BR, Park, SH

“…The small organic molecule can passivate defects on the grain surround and surface of perovskite crystal structures, preventing nonradiative recombination and charge trapping. In this study, a new small organic additive called 2, 8-dibromodibenzofuran (diBDF) is reported and examines its effectiveness as a passivating agent in high-performance green quasi-2D PeLEDs. …”

Optimizing resource allocation in large communications satellite constellations by Pachler de la Osa, Nils

“…In particular, novel methods for the Beam Shaping, User Grouping, Satellite Routing, Frequency Assignment, and Gateway Routing problems are proposed, tailored for large non-geostationary orbit constellations with satellites at multiple altitudes, referred to as hybrid systems. …”
Get full text

A statistical characteristics preserving watermarking scheme for time series databases by Yu, Yelu, Ma, Zehua, Zhang, Jie, Fang, Han, Zhang, Weiming, Yu, Nenghai

“…Since statistical characteristics analysis is performed in groups, compared with traditional relational databases, time series databases (TSDBs) have obvious time-grouping characteristics and are more valuable for analysis. …”
Get full text

C-F bond activation by transient phosphenium dications by Đorđević, Nemanja, Tay, Madelyn Qin Yi, Muthaiah, Senthilkumar, Ganguly, Rakesh, Dimić, Dušan, Vidović, Dragoslav

“…Evidence for the existence of transient dicationic species was obtained by trapping the dication 4a2+ with PMe3. According to theoretical analysis, the low-lying lowest unoccupied molecular orbitals of these species were responsible for the observed activation of C–F bonds.…”
Get full text
Get full text

Perovskite light emitting transistors by Cheng, Bryan Wei Hao

“…Unfortunately, PeLETs suffer from low brightness and environmental instability related to intrinsic material limitations, such as temperature-activated trapping, ionic motion and polarization effects, which limit device performance and stability at ambient conditions. …”
Get full text

Blue shift in photoluminescene of semiconductor nanostructures by Khin, San Thit.

“…The bond-order-length-strength (BOLS) correlation indicates that the atomic coordination imperfection causes the remaining bonds of the under-coordinated atom to contract spontaneously associated with bond strength gain and the interatomic trapping potential well depression. This project also involved the study of the entire band structure such as the band gap expansion, core-level shift, Stokes shift (electron-phonon interaction), and dielectric suppression (electron polarization). …”
Get full text

Organic ferroelectric memory devices based on resistive switching by Damar Yoga Kusuma

“…On the other hand, mutual combination of SAM’s fixed dipole and ferroelectric’s polarizable dipole is employed to realize ferroelectric field effect transistor devices with tailored operational parameters, reduced charge trapping and improved retention stability. The final part of the thesis demonstrates novel organic resistive switching memory concept based on ferroelectric tunnel junction. …”
Get full text

Silicon nanowires for photovoltaics : from the material to the device by Togonal, Alienor Svietlana

“…Indeed solar cells based on SiNW s benefit from their outstanding optical properties such as extreme light trapping and very low reflectance. In this research project, we have fabricated disordered SiNWs using a low-cost top-down approach named the Metal-Assisted-Chemical-Etching process (MACE). …”
Get full text

Delocalized Davydov D1 Ansatz for the Holstein polaron by Sun, Jin, Duan, Liwei, Zhao, Yang

“…Unique solutions are obtained with the delocalized D1 for different initial conditions when the transfer integral is 20 times the phonon frequency at the zone center, implying the absence of any self-trapping discontinuity. The scaled correlation variance is found to fit satisfactorily well with the predictions of the perturbation theories.…”
Get full text
Get full text

Atomic-scale mechanisms of defect- and light-induced oxidation and degradation of InSe by Kistanov, Andrey A., Cai, Yongqing, Zhou, Kun, Dmitriev, Sergey V., Zhang, Yong-Wei

“…Moreover, under ambient conditions, the splitting of O2 enables the formation of substitutional (apical) oxygen atomic species, which further cause the trapping and subsequent rapid splitting of H2O molecules and ultimately the formation of hydroxyl groups. …”
Get full text

Three-dimensional modeling of near-field beam profiles from grating couplers using a deep neural network by Lim, Yu Dian, Tan, Chuan Seng

“…Integrated silicon photonics (SiPh) gratings have been widely studied for the optical addressing of trapped ions. As the formfactor of ion traps reduces, the ion-trapping height decreases, and may unavoidably fall into the reactive near-field region of SiPh gratings. …”
Get full text

Resistive switching memory phenomena in PEDOT PSS : coexistence of switchable diode effect and write once read many memory by Nguyen, Viet Cuong, Lee, Pooi See

“…The effect was explained as charge trapping of PEDOT PSS film and movement of proton. …”
Get full text
Get full text

Parameter extraction of solar cells by Weng, YiJie

“…Although this low absorption coefficient can be overcome by light trapping, researchers have started looking into the context of organic solar cell. …”
Get full text

CFD analysis of flow across adjacent buildings with concave roof structure using large-eddy simulation (LES) by Foo, Tze Jie

“…On top of this application, the concave roof structure also provides a method of trapping onto the water instead of letting the rainwater flow down the roof, which can help reduce the chances of flash floods during heavy monsoon seasons. …”
Get full text

The effects of dub-off angle on chip evacuation in single-lip deep hole gun drilling by Wan, S., Tnay, Guan Leong, Woon, Keng Soon, Yeo, Swee Hock

“…This is demonstrated through a case study on improving the shoulder dub-off design of commercial gun drills, which have a high tendency in trapping chips at the hole bottom. A more effective design criterion for the shoulder dub-off is thus proposed.…”
Get full text
Get full text