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STARCH BASED MICROSPHERE BIOLASERS 淀粉基微球生物激光器
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.627.pce
V. T. Nguyen
{"title":"STARCH BASED MICROSPHERE BIOLASERS","authors":"V. T. Nguyen","doi":"10.56651/lqdtu.jst.v1.n01.627.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.627.pce","url":null,"abstract":"Recently, biolasers whose optical cavity is made of natural materials such as serum-extracted protein, egg white, cellulose, and gelatin have attracted a lot of attention. The advantage of these lasers is their biocompatibility and biodegradability which is significant for biointegration. In this study, we demonstrate that starch is a low-cost and good material for microsphere biolasers. By using a simple emulsion method with a dehydration process, dye-doped starch microsphere lasers with diameters ranging from 40 to 180 μm have been successfully obtained. Lasing properties are investigated and the results show that the lasing threshold is approximately 1.0 μJ and the quality factor can reach 2700. The starch-based microsphere lasers indicate excellent stability after a storage time of a month; thus, they are promising for practical applications in biological and chemical sensors.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"26 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114003145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
FABRICATION OF Cs2TeI6 FILM BY ANNEALING CsI FILM IN TeI4 VAPOUR: EFFECT OF ANNEALING TEMPERATURE 在TeI4蒸气中退火CsI薄膜制备Cs2TeI6薄膜:退火温度的影响
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.629.pce
Dinh Hoat Phung
{"title":"FABRICATION OF Cs2TeI6 FILM BY ANNEALING CsI FILM IN TeI4 VAPOUR: EFFECT OF ANNEALING TEMPERATURE","authors":"Dinh Hoat Phung","doi":"10.56651/lqdtu.jst.v1.n01.629.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.629.pce","url":null,"abstract":"Halide perovskites are now considered promising materials in the field of optoelectronic devices. Recently, the double halide-perovskite cesium tellurium iodine Cs2TeI6 has shown its potential application due to its strong stability, high absorption coefficient, suitable bandgap and composition of non-toxic elements. However, studies on its experimental fabrications are still limited. In previous works, we reported a method for fabricating Cs2TeI6 thin films by a synthesis of a CsI film followed by annealing in TeI4 vapor. Those studies focused more on application orientation rather than in-depth analysis of the influence of technical parameters on the film formation. In this study, we make CsI films by using the chemical vapor deposition method and then investigate the effect of TeI4-annealing temperature in the range of 120-330ºC on the Cs2TeI6 film formation. After that, the optical property and long-term stability are examined. At 240ºC, the film is black, tightly packed and pin-hole free with a good adhesion with the substrate. It has high absorbance in the visible region with an optical bandgap of 1.61 eV and the film is found to be very stable in humid air for 20 weeks.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"387 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120869349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SYNTHESIS AND ELECTROCHEMICAL CHARACTERISTICS OF ZINC-DOPED SODIUM MANGANESE OXIDE AS A CATHODE MATERIAL FOR SODIUM-ION BATTERIES 钠离子电池正极材料锌掺杂氧化锰钠的合成及电化学特性研究
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.623.pce
T. Nguyen
{"title":"SYNTHESIS AND ELECTROCHEMICAL CHARACTERISTICS OF ZINC-DOPED SODIUM MANGANESE OXIDE AS A CATHODE MATERIAL FOR SODIUM-ION BATTERIES","authors":"T. Nguyen","doi":"10.56651/lqdtu.jst.v1.n01.623.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.623.pce","url":null,"abstract":"In this article, zinc-doped sodium manganese oxide (NZMC) was synthesized by a conventional solid-state reaction method. Structure and morphology of the NZMC material were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS). The results show that Zn was successfully doped into the sodium manganese-based oxide (NMC) material. The NZMC material was utilized as a cathode material in CR2032-type coin cells for testing its electrochemical characteristics. The NZMC material had a superior initial discharge capacity of 155 mAh.g-1 between 1.5-4 V at a current density of 0.1 C. The capacity remained at 100 mAh.g-1 after 50 cycles. The results suggest that the NZMC material is a promissing cathode for sodium-ion batteries.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130044355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SYNTHESIS, CHARACTERIZATION AND ELECTROCHEMICAL PROPERTIES OF rGO/NiCo2S4 NANOCOMPOSITE FOR SUPERCAPACITOR APPLICATION 超级电容器用氧化石墨烯/NiCo2S4纳米复合材料的合成、表征及电化学性能
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.624.pce
Van Nguyen To
{"title":"SYNTHESIS, CHARACTERIZATION AND ELECTROCHEMICAL PROPERTIES OF rGO/NiCo2S4 NANOCOMPOSITE FOR SUPERCAPACITOR APPLICATION","authors":"Van Nguyen To","doi":"10.56651/lqdtu.jst.v1.n01.624.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.624.pce","url":null,"abstract":"In this study, rGO/NiCo2S4 composite materials were successfully synthesized by hydrothermal method. The properties of obtained materials were systematically characterized using XRD, SEM, EDX, and Raman techniques. The electrochemical performance of the materials was evaluated through cyclic voltammetry (CV) and Galvanostatic charge-discharge (GCD) measurements. The results show that the supercapacitor fabricated using rGO/NiCo2O4 could store energy using both double-layer and pseudocapacitor mechanisms with outstanding electrochemical properties. The specific capacity was up to over 2000 F/g at scanning speed of 10 mV/s or 1200 F/g at a current density of 1 A/g, which is 200-250% higher than the specific capacity of NiCo2S4 materials. This result demonstrates that rGO/NiCo2S4 material is a potential electrode material for supercapacitor applications.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124580026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EFFECTS OF IRON (III) OXIDE NANOPARTICLE ON THE BURNING CHARACTERISTICS OF THE PYROTECHNIC COMPOSITION FOR INFRARED EMISSION BASED ON MAGNESIUM-TEFLON-VITON 氧化铁纳米颗粒对镁-铁氟通红外发射烟火组合物燃烧特性的影响
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.630.pce
Nam Son Nguyen
{"title":"EFFECTS OF IRON (III) OXIDE NANOPARTICLE ON THE BURNING CHARACTERISTICS OF THE PYROTECHNIC COMPOSITION FOR INFRARED EMISSION BASED ON MAGNESIUM-TEFLON-VITON","authors":"Nam Son Nguyen","doi":"10.56651/lqdtu.jst.v1.n01.630.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.630.pce","url":null,"abstract":"Nano additives are materials that have been widely used to increase the effectiveness of pyrotechnic compositions. This study examines the effects of iron (III) oxide (Fe2O3) nanoparticles on the burning characteristics (i.e., the heat of combustion, the burning rate, and the infrared radiance) of the pyrotechnic composition based on Magnesium-Teflon-Viton (MTV). The dispersion of nano additive in the pyrotechnic composition is evaluated using SEM and EDX. The experimental results demonstrate that the heat of combustion and the burning rate are increased while the spectral radiance is shifted to the shorter wavelength area with the complement of the additive Fe2O3 nanoparticle to the MTV composition.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127314381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
SYNTHESIS AND PROPERTIES OF HYBRID AEROGEL MATERIALS BASED ON LIGNOSULFONATE AND SILICA USING SUPERCRITICAL DRYING 木质素磺酸盐与二氧化硅复合气凝胶材料的超临界干燥合成及性能研究
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.622.pce
V. Nguyen
{"title":"SYNTHESIS AND PROPERTIES OF HYBRID AEROGEL MATERIALS BASED ON LIGNOSULFONATE AND SILICA USING SUPERCRITICAL DRYING","authors":"V. Nguyen","doi":"10.56651/lqdtu.jst.v1.n01.622.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.622.pce","url":null,"abstract":"In this study, the sol-gel method was used for the synthesis of hydrogels based on liquid glass and sodium lignosulfonate. Isopropyl alcohol was used to subsitute water in the hydrogel structure, preventing linear shrinkage and maintaining the water content in the range of 1-4.8%. Subsequently, these hydrogels were subjected to supercritical drying at 40°C and a pressure of 12 MPa in a 250 mL device together with a supercritical CO2 consumption of 100 Nl/h, resulting in a hybrid aerogel with a specific surface area reaching 483 m2/g. The resulting aerogels have a micro-mesoporous structure with average pore sizes of 3-50 nm and a total pore volume ranging from 0.27 to 2.19 cm3/g. These hybrid aerogel materials have a noticeably low density (i.e., as low as 0.055 g/cm3).","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134561321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DESIGN AND EVALUATION OF A SEAWATER REVERSE OSMOSIS DESALINATION PLANT USING COMPUTER SOFTWARE 利用计算机软件对海水反渗透淡化装置进行设计与评价
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.632.pce
H. Cao
{"title":"DESIGN AND EVALUATION OF A SEAWATER REVERSE OSMOSIS DESALINATION PLANT USING COMPUTER SOFTWARE","authors":"H. Cao","doi":"10.56651/lqdtu.jst.v1.n01.632.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.632.pce","url":null,"abstract":"Seawater and brackish desalination using reverse osmosis (RO) has been a pragmatic approach to mitigating fresh water shortage in many water-stressed areas worldwide. Compared with other desalination technologies, RO has several attributes including high energy efficiency and system modularization. To achieve these notable attributes, for large-scale seawater RO plants, it is critical to accurately design and evaluate the RO process before plant installation and operation. In this study, the IMSDesign software is applied to design a seawater RO plant with a capacity of 100 m3 of fresh water per hour. The software allows to customize the design parameters and operating conditions of the RO plant to meet the design requirements. After inputting design parameters and operating conditions, the RO plant operation can be simulated to obtain its performance indexes for plant design evaluation. The evaluation results reveal that the RO plant with membrane trains arranged in 2-passes configuration can obtain high quality permeate that meets the required standards for drinking water at energy consumption and water cost of 10.66 kWh/m3 and 2.48 USD/m3, respectively.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121383467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
ELECTROMAGNETIC CORRECTION IN THE MUON DECAY 介子衰变中的电磁校正
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.621.pce
Nhu Xuan Nguyen, Toan Thang Vu
{"title":"ELECTROMAGNETIC CORRECTION IN THE MUON DECAY","authors":"Nhu Xuan Nguyen, Toan Thang Vu","doi":"10.56651/lqdtu.jst.v1.n01.621.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.621.pce","url":null,"abstract":"The influence of electromagnetic interaction in one photon approximation was applied to study the muon decay in electroweak interaction. The divergences that ariose in this process were infrared ones in the low energy region. The divergent treatment was carried out with two methods: the minimum mass method and the dimensional regularization method. As a result, an electromagnetic correction was calculated for the muon electroweak decay rate. The results that we received confirm that the Fermi theory of weak interaction is a non-renormalizable theory.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124039730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EPOXY RESIN, VINYL COPOLYMER, AND RICE HUSK SILICA BASED TERNARY NANOCOMPOSITES: FABRICATION, MECHANICAL CHARACTERISTICS, AND THERMAL AGING 环氧树脂、乙烯共聚物和稻壳二氧化硅基三元纳米复合材料:制造、机械特性和热老化
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.633.pce
M. C. Vu
{"title":"EPOXY RESIN, VINYL COPOLYMER, AND RICE HUSK SILICA BASED TERNARY NANOCOMPOSITES: FABRICATION, MECHANICAL CHARACTERISTICS, AND THERMAL AGING","authors":"M. C. Vu","doi":"10.56651/lqdtu.jst.v1.n01.633.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.633.pce","url":null,"abstract":"In this research, the bio-composites based on epoxy resin filled with nano-silica and vinyl copolymer were fabricated using diethylene triamine as a curing agent and casting method. The vinyl copolymer was synthesized from Hydroxyethyl Acrylate and Methacrylic acid using ammonium persulfate as an initiator. The bio-silica was extracted from rice husk via a simple technique of acid treatment and calcination. The chemical structure of poly(HEA-Co-MAA), silica was confirmed with help of the FTIR, and NMR-1H. The high-speed mechanical stirrer was used to obtain the good dispersion of silica and poly(HEA-Co-MAA) in epoxy resin before mixing and curing with Diethylenetriamine (DETA) hardener. The thermal stability of cured epoxy resin was enhanced with the presence of rice husk silica and poly(HEA-Co-MAA). The composite sample with 1 wt.% of bio-silica and 3 wt.% of poly(HEA-Co-MAA) showed the best mechanical properties with an improvement of up to 28.82%; and 35.36% of impact strength and tensile strength, respectively when compared with a pristine sample. The aging testing was also performed to investigate the effect of additive added on the thermal resistance of epoxy resin.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121036961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
INVESTIGATION OF EFFICACY OF A DCBRN-01VN SKIN DECONTAMINANT AGAINST ORGANOPHOSPHATE AGENT 一种dbrn - 01vn皮肤去污剂对有机磷剂的效果研究
Journal of Science & Technique - Section of Special Construction Engineering Pub Date : 2023-04-27 DOI: 10.56651/lqdtu.jst.v1.n01.634.pce
Ngoc Doan Vu
{"title":"INVESTIGATION OF EFFICACY OF A DCBRN-01VN SKIN DECONTAMINANT AGAINST ORGANOPHOSPHATE AGENT","authors":"Ngoc Doan Vu","doi":"10.56651/lqdtu.jst.v1.n01.634.pce","DOIUrl":"https://doi.org/10.56651/lqdtu.jst.v1.n01.634.pce","url":null,"abstract":"This research has been initiated to examine the effectiveness of DCBRN-01VN lotion in degrading some readily available organic phosphorous (OP). UPLC-MS/MS technique was used to measures the amount of residual pesticide via selected ion monitoring. The results showed that lotion effectively degrades OP expediently. The removal efficiency is nearly 100% with MP at 6th min and MT at 2nd min when the molar ratio of KBDO and OP is 10:1. The results in vivo test with both solutions (MP and MT) on pig skin showed that the toxic removal efficiency was over 90%, for MP was over 98%.","PeriodicalId":170632,"journal":{"name":"Journal of Science & Technique - Section of Special Construction Engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128505979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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