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您的检索式：作者名="Liangbo Ma"
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| 1 | Ab initio investigation of the cyclodehydrogenation process for polyanthrylene transformation to graphene nanoribbons显示文摘Graphene nanoribbons(GNRs)can be synthesized from molecular precursors with atomic precision.A prominent case is the 7-atom-wide armchair GNR made from 10,10′-dibromo-9,9′-bianthryl(DBBA)precursors on metal substrates through dehalogenation/polymerization followed by cyclodehydrogenation.We investigate the key aspects of the cyclodehydrogenation process by evaluating the energy profiles of various reaction pathways using density functional theory and the nudged elastic band method.The metal substrate plays a critical catalytic role by providing stronger adsorption for products and facilitating H desorption.For polyanthrylene on an extra layer of GNR on Au,the underlying GNR insulates it from the Au substrate and increases the reaction barriers,rendering the polyanthrylene“quasi-freestanding”.However,positive charge injection can induce localized cyclodehydrogenation.We find that this is due to the stabilization of an intermediate state through an arenium ion mechanism and favorable orbital symmetries.These results provide mechanistic insight into the effects of the metal substrate and charge injection on cyclodehydrogenation during GNR synthesis and offer guidance for the design and growth of new graphitic structures. | Zhongcan Xiao Chuanxu Ma Wenchang Lu Jingsong Huang Liangbo Liang Kunlun Hong An-Ping Li Bobby G.Sumpter Jerzy Bernholc | 2019 | npj Computational Materials2019，，1： | 0 |
| 2 | A decouple-decomposition noise analysis model for closed-loop mode-localized tilt sensors显示文摘The development of mode-localized sensors based on amplitude output metrics has attracted increasing attention in recent years due to the potential of such sensors for high sensitivity and resolution.Mode-localization phenomena leverage the interaction between multiple coupled resonant modes to achieve enhanced performance,providing a promising solution to overcome the limitations of traditional sensing technologies.Amplitude noise plays a key role in determining the resolution of mode-localized sensors,as the output metric is derived from the measured AR(amplitude ratio)within the weakly coupled resonator system.However,the amplitude noise originating from the weakly coupled resonator's closed-loop circuit has not yet been fully investigated.This paper presents a decouple-decomposition(DD)noise analysis model,which is applied to achieve high resolution in a mode-localized tilt sensor based on a weakly coupled resonator closed-loop circuit.The DD noise model separates the weakly coupled resonators using the decoupling method considering the nonlinearity of the resonators.By integrating the decoupled weakly coupled resonators,the model decomposes the weakly coupled resonator's closed-loop circuit into distinct paths for amplitude and phase noise analyses.The DD noise model reveals noise effects at various circuit nodes and models the system noise in the closed-loop circuit of the weakly coupled resonators.MATLAB/Simulink simulations verify the model's accuracy when compared to theoretical analysis.At the optimal operating point,the mode-localized tilt sensor achieves an input-referred instability of 3.91×10^(-4°)and an input-referred AR of PSD of 2.01×10^(-4°)⁄√Hz using the closed-loop noise model.This model is also applicable to other varieties of mode-localized sensors. | Kunfeng Wang XingYin Xiong Zheng Wang Liangbo Ma BoWen Wang WuHao Yang Xiaorui Bie ZhiTian Li XuDong Zou | 2023 | Microsystems & Nanoengineering2023，9，6： | 0 |
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