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BIN ZENG,WUJUN ZENG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.1
Graphene loaded hexagonal CuS/Ag2S nanoplates have been successfully synthesized. Scanning electron microscopy and transmission electron microscopy observations show that hexagonal CuS/Ag2S nanoplates are tightly anchored onto graphene. The experimental results show that these nanocomposites have a highly visible-light photocatalytic performance. The high visible photocatalytic activities can be attributed to direct photoinduced interfacial charge transfer in the hexagonal CuS/Ag2S nanoplates and the further electrons transfer from CuS/Ag2S to graphene.
Graphene Decorated with Hierarchical CuS Nanoplates: Enhanced Photocatalytic Performance
BIN ZENG,Wanfeng Liu,WUJUN ZENG,Can Jin 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2018 NANO Vol.13 No.3
Graphene decorated with hierarchical CuS nanoplates (CuS NP-G) was synthesized using a microwave method to be used as a photocatalytic material. The incorporation of graphene into hierarchical CuS nanoplates was confirmed by structural, morphological and optical characterizations. The photocatalytic performance of the nanocomposite was evaluated. This study confirmed that the introduction of graphene was an effective way not only to improve the structural stability and service durability of the composite, but also to improve its solar photocatalytic activity by promoting the electron transfer and charge separation of hierarchical CuS nanoplates.
The Synthesis of CuS Hexagonal Nanosheet-Graphene for Use as a High Performance Photocatalyst
BIN ZENG,Yang Yin 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.5
CuS hexagonal nanosheet/graphene was fabricated by a facile one-pot microwave-thermal method. The samples possess excellent photocatalytic activity for degradation of organic pollutant under visible light. The high photocatalytic activity was attributed to the deposition of CuS hexagonal nanosheet onto graphene. CuS nanosheet serves as a transporter which efficiently inhibits the recombination of the photo-induced charge carriers in the nanocomposites. The developed method demonstrates a facile approach towards the synthesis of two-dimensional semiconductor-graphene nanocomposites with excellent photocatalytic performance under visible light.
An Efficient DHT Routing Protocol with Small-world Features for Structured P2P Network
Bin Zeng,Rui Wang 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.7
Distributed Hash Tables (DHT) provide a fault-tolerant and scalable means to store data blocks in P2P systems. In this thesis, we have proposed an improved version of CAN called “small-world DHT”. The key idea is to link each CAN node to a constant number of long-distance contacts, which are chosen according to the probability density function. This enables our scheme to achieve O(log2n) routing path length with O(1) routing table size per node. We have shown that the hybrid infrastructure of a structured overlay network (CAN) and a random graph (small-world model) not only preserve CAN’s simplicity, but also achieves a resilient and efficient DHT routing algorithm. We have also exploited the LookAhead-GREEDY routing algorithm, whereby each node obtains information about its neighbors’ neighbors by periodically exchanging the routing table entries with its neighbors. The routing algorithm improves the routing efficiency and enhances the network’s resilience to failure. Our scheme requires knowledge of the current network size in order to construct the long-distance links. To estimate the network size, the latter maintains a distributed binary partition tree and measures the size of the sample area by counting the number of leaves in the corresponding branch.
Zeng Bin,Feng Ze-Rui,Liu Ya-Ting,Chen Fu-Rong,Wang Shuai,Wu Shun-Fan,Yu Zhi-Tao,Gao Cong-Fen 한국응용곤충학회 2022 Journal of Asia-Pacific Entomology Vol.25 No.4
Cap ‘n’ collar C (CncC), a transcription factor, plays a vital role in the development of insect resistance by regulating the expression of multiple detoxifying genes. Clarifying the molecular characteristics of CncC and its pathway regulating insecticide resistance will aid the development of integrated pest control strategies. Here we cloned and identified the molecular feature of CncC genes from the brown planthopper (BPH), Nilaparvata lugens (Stål), (Hemiptera Delphacidae). The full-length open reading frame of NlCncC was 3015 nucleotides with 1005 amino acids. The deduced amino acid sequence has a high similarity with other insect homologs and contains the characteristic Cnc/bZip domain architecture. Functional studies showed that silencing NlCncC by RNA interference (RNAi) could downregulate the transcript expression of NlCYP6ER1, NlCYP6CW1, and NlCYP6AY1, which increase the susceptibility to imidacloprid in N. lugens. The identification of molecular characteristics of NlCncC and func tional studies in this paper will contribute to designing effective control strategies for N. lugens.
ARCHITECTURE OF FLOWER-LIKE rGO/CNTs-LOADED CuxO NANOPARTICLES AND ITS PHOTOCATALYTIC PROPERTIES
BIN ZENG,XIAOHUA CHEN,XUTAO NING,CHUANSHENG CHEN,HUI LONG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.5
Novel flower-like composite architecture was successfully synthesized by spray drying and post-calcinating method for the first time. Scanning electron microscopy and transmission electron microscopy observations confirmed that reduced graphene oxides/carbon nanotubes hybrid (rGO/CNTs) formed a flower-like micrometer structure and Cu2O, CuO (CuxO, x = 1 or 2) nanoparticles were decorated inside them. The photocatalytic properties were further investigated by evaluating the photodegradation of a pollutant methyl orange (MO). The experimental results indicated that this novel architecture enhanced photocatalytic performance with 96.2% decomposition of MO after 25 min in the presence of H2O2 under visible light irradiation, which was much higher than that of CuxO powders (33.2%). This could be attributed to the more efficient adsorption of MO molecules on flower-like rGO/CNTs and provide a high concentration of MO near to the CuxO nanoparticles, thus promoting the photocatalytic degradation process.
BIN ZENG,YOUXIN LUO,QIYUAN LIU,WUJUN ZENG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.2
The composite of carbon nanotubes/graphene networks loaded-Ni (CNTs/GR-Ni) were suc-cessfully synthesized by spray drying and post-calcinating method for the ¯rst time. The syn-thesized products were systematically studied by X-ray di®raction, scanning electron microscopyand transmission electron microscopy. The result showed the hybrid of CNTs and graphenecomposed the 3D network structure and Ni nanoparticles were attaching on their surface. Adsorption performance evidenced that the obtained nanocomposite possessed high adsorptione±ciency and excellent separation property.
Zeng, Hui,Wang, Xue-Bin,Cui, Ning-Hua,Nam, Seungyoon,Zeng, Tuo,Long, Xinghua Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.15
Previous genome-wide association studies (GWAS) have implicated several single nucleotide polymorphisms (SNPs) in the AT-rich interactive domain 5B (ARID5B) gene with childhood acute lymphoblastic leukemia (ALL). However, replicated studies reported some inconsistent results in different populations. Using meta-analysis, we here aimed to clarify the nature of the genetic risks contributed by the two polymorphisms (rs10994982, rs7089424) for developing childhood ALL. Through searches of PubMed, EMBASE, and manually searching relevant references, a total of 14 articles with 16 independent studies were included. Odds ratios (ORs) with 95% confidence intervals (95%CI) were calculated to assess the associations. Both SNPs rs10994982 and rs7089424 showed significant associations with childhood ALL risk in all genetic models after Bonferroni correction. Furthermore, subtype analyses of B-lineage ALL provided strong evidence that SNP rs10994982 is highly associated with the risk of developing B-hyperdiploid ALL. These results indicate that SNPs rs10994982 and rs7089424 are indeed significantly associated with increased risk of childhood ALL.
Bin Zeng,Rui Wang 보안공학연구지원센터 2016 International Journal of u- and e- Service, Scienc Vol.9 No.6
There exist a lot of medium access control (MAC) protocols for wireless sensor networks. However, they consider mainly energy efficiency rather than latency which is important in delay sensitive mobile sensor networks. Therefore, a new MAC protocol called MS-MAC is proposed suitable to both stationary and mobile sensor networks. MS-MAC uses an adaptive frame structure improved for well known protocol S-MAC to overcome the performance problems caused by the packets latency in the mobile environment. The selection of monitor nodes and periodic scheduling of synchronization packets are used to predict the speed of mobile nodes, which can save the energy consumption and minimize latencies. Our studies show that under static scenarios, the MS-MAC behavior similar with MS-MAC. However, MS-MAC can increase the network throughput and reduce the latency significantly without more energy loss in comparison with S-MAC in mobile environment.
ZENG BIN 한양대학교 세라믹연구소 2017 Journal of Ceramic Processing Research Vol.18 No.2
SnS microflower-graphene (G-SnS) has been successfully prepared by microwave method. Scanning electron microscopy andtransmission electron microscopy observations confirm that flower-like SnS composing of numerous nanoplates as buildingblocks are homogeneously attached onto the surface of graphene. The experimental results show that these nanocompositeshave high visible-light photocatalytic activities towards methyl orange (MO). It is believed that the hierarchical nature of themicroflower structure and the intimate combination of microflower with graphene are responsible for the enhancedphotocatalytic performance.