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Xie, Lin,Hwang, Heewon,Kim, Minjung,Kim, Kyungkon Korean Society of Photoscience 2015 Rapid communication in photoscience Vol.4 No.4
The influence of the grain size of the $CH_3NH_3PbI_3$ on the solar cell performance is investigated by controlling the ratio between $CH_3NH_3I$ and $PbI_2$ precursors. As the concentration of the precursors increased from 1.0M to 2.0M, the $CH_3NH_3PbI_3$ grain size increased from ~100nm to ~400nm. The solar cell utilizing the $CH_3NH_3PbI_3$ with large grain size shows improved photocurrent compared to the solar cell utilizing $CH_3NH_3PbI_3$ with small grain size, which is ascribed to the reduced recombination at the boundaries of grains.
Xie, Lin,Lee, Ji Sang,Jang, Yoonhee,Ahn, Hyungju,Kim, Yun-Hi,Kim, Kyungkon American Chemical Society 2016 The Journal of Physical Chemistry Part C Vol.120 No.24
<P>Organic photovoltaics (OPVs) utilizing an interdigitated bilayer of an alkoxynaphthalene-based polymer nanofiber/fullerene have been developed by the sequential solution deposition (SqD) process. Spin-coating a polymer solution incorporated with 1-chloronaphthalene (1-CN) results in the formation of dense polymer nanofibers with diameters of 30-50 nm. The fullerene top layer is sequentially deposited onto the polymer nanofiber bottom layer to form a bulk heterojunction (BHJ) through the interdiffusion of fullerene. Compared to a plane polymer bottom layer, the preformed polymer nanofiber bottom layer provides effective interdiffusion of phenyl-C71-butyric acid methyl ester (PCBM) by facilitating the fast swelling of the PCBM solvent into the polymer bottom layer. The SqD processed OPV utilizing a polymer nanofiber/fullerene bilayer exhibits higher photocurrent density compared to those utilizing a plane polymer layer/fullerene bilayer. Furthermore, the SqD OPV exhibited superior solar cell performance to the OPV prepared by the polymer:fullerene blend solution deposition (BSD) process. Optical, morphological, and J V investigations on the photoactive layers reveal that improved ordering of the polymer chain with proper direction and increased heterojunction area are the main contributors to the superior solar cell performance. These results suggest an efficient interdigitated BHJ morphology can be realized by a sequentially deposited, preformed nanofiber/fullerene bilayer without a thermal annealing process.</P>
Xie, Lin,Cho, An-Na,Park, Nam-Gyu,Kim, Kyungkon American Chemical Society 2018 ACS APPLIED MATERIALS & INTERFACES Vol.10 No.11
<P>An efficient CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> perovskite solar cell whose performance is reproducible and shows reduced dependence on the processing conditions is fabricated using the cyclic urea compound 1,3-dimethyl-2-imidazolidinone (DMI) as an additive to the precursor solution of CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB>. X-ray diffraction analysis reveals that DMI weakly coordinates with PbI<SUB>2</SUB> and forms a CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> film (film-DMI) with no intermediate phase. The surface of annealed film-DMI (film-DMI-A) was smooth, with an average crystal size of 1 μm. Photoluminescence and transient photovoltage measurements show that film-DMI-A exhibits a longer carrier lifetime than a CH<SUB>3</SUB>NH<SUB>3</SUB>PbI<SUB>3</SUB> film prepared using the strongly coordinating additive dimethyl sulfoxide (DMSO) (film-DMSO-A) because of the reduced number of defect sites in film-DMI-A. A solar cell based on film-DMI-A exhibits a higher power conversion efficiency (17.6%) than that of a cell based on film-DMSO-A (15.8%). Furthermore, the performance of the film-DMI-A solar cell is less sensitive to the ratio between PbI<SUB>2</SUB> and DMI, and film-DMI can be fabricated under a high relative humidity of 55%.</P> [FIG OMISSION]</BR>
APPLICATION OF ROTHE'S METHOD TO A NONLINEAR WAVE EQUATION ON GRAPHS
Lin, Yong,Xie, Yuanyuan Korean Mathematical Society 2022 대한수학회보 Vol.59 No.3
We study a nonlinear wave equation on finite connected weighted graphs. Using Rothe's and energy methods, we prove the existence and uniqueness of solution under certain assumption. For linear wave equation on graphs, Lin and Xie [10] obtained the existence and uniqueness of solution. The main novelty of this paper is that the wave equation we considered has the nonlinear damping term |u<sub>t</sub>|<sup>p-1</sup>·u<sub>t</sub> (p > 1).
EFFECTIVE SYNTHESIS AND APPLICATION OF ZAO NANOPARTICLES WITH GOOD DISPERSION
LIN-LIN ZHANG,HONG-ZHEN XIE,MIN ZHANG,JIN-KU LIU,XIAO-HONG YANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2012 NANO Vol.7 No.3
The well dispersed ZAO nanoparticle with 25?30 nm in diameter was prepared by an ultrasonictemplate method. The morphologies, structures, and photoelectricity of the ZAO nanoparticles were analyzed by TEM, XRD, UV-Vis, etc. The thermochemistry behaviors of the precursor were studied by TG-DSC. The composite ¯lm with semipermeable structure made from ZAO nanoparticles and collodion can be explored ¯rstly. The photocatalytic properties of the ZAO nanoparticles and composite ¯lm were investigated. The composite ¯lm can be applied in the sewage treatment ¯eld.
Channel Capacity Analysis of DNA-based Molecular Communication with Length Encoding Mechanism
( Jialin Xie ),( Qiang Liu ),( Kun Yang ),( Lin Lin ) 한국인터넷정보학회 2021 KSII Transactions on Internet and Information Syst Vol.15 No.8
The double helix structure of DNA makes it diverse, stable and can store information with high density, and these characteristics are consistent with the requirements of molecular communication for transport carriers. In this paper, a specific structure of molecular communication system based on DNA length coding is proposed. Transmitter (Tx) adopts the multi-layer golden foil design to control the release of DNA molecules of different lengths accurately, and receiver (Rx) adopts an effective and sensitive design of nanopore, and the biological information can be converted to the electric signal at Rx. The effect of some key factors, e.g., the length of time slot, transmission distance, the number of releasing molecules, the priori probability, on channel capacity is demonstrated exhaustively. Moreover, we also compare the transmission capacity of DNA-based molecular communication (DNA-MC) system and concentration-based molecular communication (MC) system under the same parameter setting, and the peak value of capacity of DNA-MC system can achieve 0.08 bps, while the capacity of MC system remains 0.025 bps. The simulation results show that DNA-MC system has obvious advantages over MC system in saving molecular resources and improving transmission stability.
Mi Lin,Qi-Yue Chen,Chao-Hui Zheng,Ping Li,Jian-Wei Xie,Jia-Bin Wang,Jian-Xian Lin,Chang-Ming Huang 대한암학회 2021 Cancer Research and Treatment Vol.53 No.4
Purpose This study aimed to evaluate the effect of preoperative tumor staging deviation (PTSD) on the long-term survival of patients undergoing radical gastrectomy for gastric cancer (RGGC). Materials and Methods Clinicopathological data of 2,346 patients who underwent RGGC were retrospectively analyzed. The preoperative tumor-lymph node-metastasis (TNM) under-staging group (uTNM) comprised patients who had earlier preoperative TNM than postoperative TNM, and the no preoperative under-staging group (nTNM) comprised the remaining patients. Results There were 1,031 uTNM (44.0%) and 1,315 nTNM cases (56.0%). Cox prognostic analysis revealed that PTSD independently affected the overall survival (OS) after surgery. The 5-year OS was lower in the uTNM group (41.8%) than in the nTNM group (71.6%). The patients less than 65 years old, with lower American Society of Anaesthesiologists score, 2-5 cm tumor located at the lower stomach, and cT1 or cN0 preoperative staging would more likely undergo D1+ lymph node dissection (LND) in uTNM (p < 0.05). Logistic analyses revealed that tumor size > 2 cm and body mass index ≤ 22.72 kg/m2 were independent risk factors of preoperative TNM tumor under-staging in patients with cT1N0M0 staging (p < 0.05). Conclusion Underestimated tumor staging is not rare, which possibly results in inadequate LND and affects the long-term survival for patients undergoing RGGC. D2 LND should be carefully performed in patients who are predisposed to this underestimation.
Siying Lin,Xiang Huang,Zhenxiang Bu,Zhihong Lin,Peiqin Xie,Xiaolong Lin,Lingyun Wang,Wenlong Lv 한국섬유공학회 2020 Fibers and polymers Vol.21 No.7
Due to its small diameter and high density, electrospun nanofiber membranes have high resistance which obstaclestheir application. In this paper, we proposed a new electrospinning method based on low-temperature, which can affect thedeposition process of electrospinning by utilizing the freezing process of steam in the receiving plate. The filling andsupporting of ice could enlarge the pores of membranes and intervals among fibers, which caused the high porosity (92 %),rough surface, fluffy structure and low pressure drop (123 Pa) of polyvinylidene fluoride (PVDF) nanofibrous membranes. The results suggested that the electrospinning method is a promising way to prepare nanofibrous membranes with high airpermeability and fluffy structure for air filtration.
Yongtao Lin,Mingyue Zhao,Lin Bai,Hailun Li,Yong Xu,Xiang Li,Juan Xie,Yiyuan Zhang,Donghui Zheng 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
Renal ischemia-reperfusion injury (RI/R) is one of the main causes of acute renal injury and a commonclinical disease with high morbidity and mortality. It is of great significance to deliver microRNAs(miRNAs) to cells and in vivo to realize gene regulation and treatment of related diseases. In this study, wereported that the nanocomplex FMN-17 could realize both therapeutic and functional monitoringsimultaneously in vivo and in vitro. The nanocomplex comprised a cationic cell-penetrating peptidenona-arginine, a targeting ligand folic acid, a caspase-3 responsive moiety, and a Cy imaging moiety. Thenanocomplex FMN-17 has been shown to deliver miR-17-5p efficiently and selectively into HK-2 cells andtissues. Treatment of HK-2 cells with the nanocomplex significantly increased the miR-17-5p level andinhibited apoptosis, as evident by reducing the expression of active caspase-3 and reactive oxygenspecies. Uptake of FMN-17 in vivo alleviated renal tissue injury by histological assessment. In summary,we designed and synthesized a new miRNA delivery system with high transfection efficiency, goodtherapeutic effect, and near-infrared imaging in renal ischemia/reperfusion injury.