Linlin Su

Shanxi Academy of Medical Sciences

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Yap Seng Chong

Singapore Institute for Clinical Sciences

Hai Lu

Nanjing University

Dong Zhou

Nanjing University

Yuriy I. Mazur

University of Arkansas at Fayetteville

Ying Wang

Hebei University

Arijit Biswas

National University Health System

Youdou Zheng

Nanjing University

Baolai Liang

Hebei University

Fangfang Ren

Nanjing University

Gregory J. Salamo

University of Arkansas at Fayetteville

Cooperative Institutions

Zhengzhou University

Chinese Academy of Sciences

Peking University

National University of Singapore

Nanjing University

National University Hospital

Tsinghua University

Collaborative Innovation Center of Advanced Microstructures

Xinxiang Medical University

National University Health System

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Electronic structures and magnetic properties of La(Zn,TM)AsO from first principles calculations (TM = V, Cr, Mn, Fe, Co and Ni)

Chemical Physics Letters (2019)

Hualong Tao Linlin Su Mengxia Wang Juan Cai Yan Cui

Magnetism

Inductive coupling

10.1016/j.cplett.2019.136654

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Citations (0)

Serum level of macrophage migration inhibitory factor predicts severity and prognosis in patients with ischemic stroke

Cytokine (2019)

Chaowei Wang Pengju Ma Yangyang Wang Ming Yang Linlin Su

Stroke

10.1016/j.cyto.2018.11.029

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Citations (18)

Fabrication of Highly Fluorescent Temperature-Sensitive Composites Based on a Synergistic Molecular Mechanism between Hydrogen-Bonded/AIEgen-Modified Conjugated Polymers and Polymer Substrates

ACS Applied Polymer Materials (2022)

Lan Shu Mengxiao Song Xinran Ma Siqian Li Yu Xu

The mechanism of intermolecular interaction between conjugated polymers (CPs) and a polymer matrix plays a decisive role in understanding and developing highly sensitive fluorescent temperature-sensing (FTS) materials. Therefore, a molecular mechanism based on a synergistic molecular mechanism, which is assisted by the interaction of an aggregation-induced emission luminogen (AIEgen) and hydrogen bonding between CPs and the matrix, is proposed and applied to the development of FTS composite materials. A series of highly sensitive FTS composites, which can be applied to different temperature ranges and scenarios, have been prepared from the perspective of molecular structure engineering based on an AIEgen- and uracil-group-modified CPs/polymer matrix composite system. In addition, the effectiveness and universality of the synergistic molecular mechanism can be proved by changing the molecular structure of optical CPs and the types of polymer substrates. Therefore, the synergistic molecular mechanism as a guide for molecular structure design can be proved to become a promising method for the preparation of highly sensitive FTS composite materials.

10.1021/acsapm.2c01386

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Citations (3)

Correlation between photoluminescence and morphology for single layer self-assembled InGaAs/GaAs quantum dots

Optics Express (2018)

Baolai Liang Qing Yuan Linlin Su Ying Wang Yingnan Guo

Single layer self-assembled InGaAs quantum dots (QDs) are manipulated by using different arsenic species on GaAs (100) surface. The As4 molecules are experimentally observed to be more promising than As2 to promote the formation of one-dimensionally-aligned QD-chain arrays. The lateral alignment of QDs and the corresponding formation of dot chains are explained by the anisotropic surface kinetics in combination with the different reactivities of the two molecules with bonding sites on the GaAs (100) surface. Photoluminescence (PL) measurements demonstrate that the spectra of the QD-chains broaden to higher energy and increases in intensity with increasing excitation laser power. The PL band of the QD-chains also exhibits a 9 meV reduction in linewidth as temperature increases starting from 8 K. These observations confirm an efficient lateral coupling between neighboring QDs and thereafter polarized QD emission, whereas the randomly distributed QDs grown with As2 show no preferential polarization. Such QD-chains exhibiting anisotropic properties have the potential for nanophotonics applications like electro-optic modulators with very low drive voltage and ultra-wide bandwidth operation.

Laser linewidth

Nanophotonics

10.1364/oe.26.023107

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Citations (14)

Effect of a Single Threading Dislocation on Electrical and Single Photon Detection Characteristics of 4H-SiC Ultraviolet Avalanche Photodiodes*

Chinese Physics Letters (2020)

Linlin Su Dong Zhou Qing Liu Fangfang Ren Dunjun Chen

We fabricated 4H-SiC ultraviolet avalanche photodiode (APD) arrays and systematically investigated the effect of threading dislocations on electrical and single photon detection characteristics of 4H-SiC APDs. Based on a statistical correlation study of individual device performance and structural defect mapping revealed by molten KOH etching, it is determined with high confidence level that even a single threading dislocation within APD active region would lead to apparent device performance degradation, including increase of dark current near breakdown voltage, premature breakdown and reduction of single photon detection efficiency at fixed dark count rate.

APDS

Threading (protein sequence)

Photodiode

Ultraviolet

10.1088/0256-307x/37/6/068502

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Citations (2)

Use of Fetal Electrocardiogram for Intrapartum Monitoring

Annals of the Academy of Medicine Singapore (2007)

Linlin Su Yap Seng Chong Arijit Biswas

Introduction: Intrapartum fetal monitoring is essential for the identification of fetal hypoxia to reduce perinatal morbidity and mortality. Cardiotocography is associated with low specificity for fetal acidosis and poor perinatal outcome leading to unnecessary operative deliveries. ST waveform analysis of the fetal electrocardiogram has been shown to be a promising adjunctive intrapartum assessment tool. We aim to present the pathophysiology, the role of intrapartum monitoring and the practical usage of this relatively new technology in our review. Methods: An electronic search of Medline and OVID was carried out, followed by a manual search of the references identified by the electronic search. Results: The incorporation of ST waveform analysis to cardiotocography has been shown to reduce the rates of neonatal metabolic acidosis, moderate and severe neonatal encephalopathy, thus improving perinatal outcome. The reduction in operative delivery rates due to fetal distress is also significant. The pathophysiology and practical usage of this technology were discussed. Conclusions: With more accurate identification of fetal hypoxia and reduction of unnecessary intervention rates, incorporation of ST waveform analysis of fetal electrocardiography into cardiotocography can improve the standard of intrapartum fetal monitoring. Key words: Cardiotocography, Fetal electocardiography, Fetal ST waveform analysis, Intrapartum, Perinatal outcomes

Cardiotocography

Fetal monitoring

Copeptin

Electronic fetal monitoring

10.47102/annals-acadmedsg.v36n6p416

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Citations (10)

Clines with partial panmixia in an environmental pocket

Theoretical Population Biology (2014)

Thomas Nagylaki Linlin Su Ian Alevy Todd F. Dupont

Panmixia

10.1016/j.tpb.2014.05.003

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Citations (4)

Crosstalk Analysis of SiC Ultraviolet Single Photon Avalanche Photodiode Arrays

IEEE photonics journal (2019)

Heng Zhang Linlin Su Dong Zhou Weizong Xu Fangfang Ren

Optical crosstalk is one of major problems limiting the performance of focal plane arrays based on single photon avalanche diodes (SPADs). In this work, for the first time the crosstalk characteristics of a 4H-SiC SPAD linear array are studied, which is based on a real-time dual channel data acquisition method. It is found that SiC SPAD array exhibits similar crosstalk probability compared with those of InGaAs-based SPAD arrays, which can be effectively reduced by trench isolation between adjacent pixels or by lowering overbias. The average time required for forming a crosstalk event is determined between 7 and 10 ns. As a result, active time-gated operation scheme can be applied for reducing crosstalk.

Crosstalk

Photodiode

Single-photon avalanche diode

Avalanche diode

Ultraviolet

10.1109/jphot.2019.2954119

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Citations (4)

An indefinite nonlinear diffusion problem in population genetics, II: Stability and multiplicity

Discrete and Continuous Dynamical Systems (2010)

Yuan Lou Wei‐Ming Ni Linlin Su

We study a genetic model with two alleles $A_{1}$ and $A_{2}$ in abounded smooth habitat $\Omega$. The frequency $u$ of the allele$A_{1}$, under the combined influence of migration and selection,obeys a parabolic equation of the type$ u_{t}=d\Delta u+g(x)f(u),~0\leq u\leq 1 $ in Ω × (0, ∞), $ \frac{\partial u}{\partial\nu}=0 $ on ∂ Ω × (0, ∞),where $\Delta$ denotes the Laplace operator, $g$ may change sign in$\Omega$, and $f(0)=f(1)=0$, $f(s)>0$ for $s\in(0,1)$. Our main results include stability/instability of thetrivial steady states $u\equiv 0$ and $u\equiv 1$, and the multiplicity of nontrivial steady states. This is a continuation of our work [12]. In particular, the conjecture of Nagylaki and Lou [11, p. 152] has been largely resolved. Similar results are obtained for Dirichlet and Robin boundary value problems as well.

Multiplicity (mathematics)

10.3934/dcds.2010.27.643

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Citations (30)

An indefinite nonlinear diffusion problem in population genetics, I: Existence and limiting profiles

Discrete and Continuous Dynamical Systems (2010)

Kimie Nakashima Wei‐Ming Ni Linlin Su

We study the following Neumann problem$ d\Delta u+g(x)u^{2}(1-u)=0 \ $in Ω , $ 0\leq u\leq 1 $in Ω and $ \frac{\partial u}{\partial\nu}=0 $ on ∂Ω, where $\Delta$ is the Laplace operator, $\Omega$ is a boundedsmooth domain in $\mathbb{R}^{N}$ with $\nu$ as its unit outwardnormal on the boundary $\partial\Omega$, and $g$ changes sign in $\Omega$. This equation models the 'complete dominance' case in population genetics of two alleles. We show that thediffusion rate $d$ and the integral $\int_{\Omega}g\ \d x$ playimportant roles for the existence of stable nontrivial solutions, and the sign of $g(x)$ determines thelimiting profile of solutions as $d$ tends to $0$. In particular, a conjecture of Nagylaki and Lou has been largely resolved. Our results and methods cover a much wider class of nonlinearities than $u^{2}(1-u)$, and similar results have beenobtained for Dirichlet and Robin boundary value problems as well.

Limiting

Operator (biology)

10.3934/dcds.2010.27.617

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Citations (28)