MOLECULES
·
2018
·Vol. 23
·期 10
·2492
·
IF 3.098
Xiaodan Liu,Fei Liu,Weihao Huang,Jiyu Peng,Tingting Shen,Yong He
Rapid detection of Cd content in soil is beneficial to the prevention of soil heavy metal pollution. In this study, we aimed at exploring the rapid quantitative detection ability of laser- induced breakdown spectroscopy (LIBS) under the conditions of air and Ar for Cd in soil, and finding a fast and accurate method for quantitative detection of heavy metal elements in soil. Spectral intensity of Cd and system performance under air and Ar conditions were analyzed and compared. The univariate model and multivariate models of partial least-squares regression (PLSR) and least-squares support vector machine (LS-SVM) of Cd under the air and Ar conditions were built, and the LS-SVM model under the Ar condition obtained the best performance. In addition, the principle of influence of Ar on LIBS detection was investigated by analyzing the three-dimensional profile of the ablation crater. The overall results indicated that LIBS combined with LS-SVM under the Ar condition could be a useful tool for the accurate quantitative detection of Cd in soil and could provide reference for environmental monitoring.Keywords:soil;Cd;laser-induced breakdown spectroscopy;argon
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yuanyuan Guo,Yixun Gao,Yao Wang,Yi-Kuen Lee,Patrick J. French,Ahmad M. Umar Siddiqui,Hao Li,Guofu Zhou
The significant in situ multicolored patterning without changing printing tools nor substrate media still remains challenging, especially toward practical applications for anti-counterfeiting. This research invented a unique universal approach for the laser-induced in situ synthesis of colorful fluorescent patterns (from blue: CIE 0.15, 0.18 to red orange: CIE 0.36, 0.39) through the controlled formation of N, S doped carbon dots (CDs) in solid composite polymer films or hydrogel with a hierarchical and physically unclonable microsurface architecture for anti-counterfeiting. The in situ patterning approach, coupled with multi-layer technique, yielding designable blue, yellow, orange, and red orange color under 365 nm in the same pattern. A 5 cm 2 colorful pattern can be efficiently finished within 5 min without changing the substrate and the line width accuracy can be up to 300 μm. The absolute quantum efficiency of the blue pattern reached as high as 23%. The fluorescent patterns can be survived at indoor for 24 months. The hydrogen bonding interactions between the CDs precursor and polymer facilitated the generation, uniform dispersion and stabilization of CDs during the laser irradiation. The hypothesis that laser irradiation induced photochemical reactions of CD precursors within a polymer matrix was supported by thermodynamic assessments. The universality of in situ fluorescent patterning strategy was demonstrated by developing fluorescent patterns on both solid polymer films, hydrogel, pharmaceutical packaging and textile.
研究领域:
材料科学
·
光学工程
·
化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
·
2025
·
IF 3.1
Zhifan Li,Huiwei Wei,Gentao Gao,Zhiyong Deng,Shaohua Sun,Zuoye Liu,Baowei Ding,Bitao Hu,Jie Shen
This study represents a highly sensitive approach of determination of lanthanides by nanochain enhanced laser induced breakdown spectroscopy (LIBS). Owing to geometrical characteristics of the nanochains, the hotspot in the gap between Ag NPs in nanochains offered an intense plasmonic field for the LIBS signal enhancement. Remarkably, the nanochain enhanced LIBS for determining Ce and La element yielded outstanding limit of detection (LOD): 27.47 and 85.71 ng/mL, respectively, indicating that the nanochain configuration exhibited enhanced LIBS signal response. The preponderant performances of the well-aligned nanoparticle sensor in elemental analysis open up its possibilities for nanochain enhanced LIBS in sensitive elemental detection.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Chemosensors
·
2025
·Vol. 13
·期 1
·16
·
IF 3.7
Yuanxin Wan,Shixiang Ma,Peichao Zheng,Xiande Zhao,Zhen Xing,Leizi Jiao,Hongwu Tian,Daming Dong
Ca and Mg are key constituents in surface water that are essential nutrients and vital indicators of water hardness. Rapid on-site measurement of Ca and Mg concentrations in surface water is important. However, traditional laboratory detection methods are complex and time-consuming, and on-site detection is difficult. In this study, a portable surface water detection method was developed using laser-induced breakdown spectroscopy with a miniaturized spectrometer LIBS and a liquid jet device for sample introduction. The device enables the rapid online in situ measurement of elemental concentrations in the water. The limits of detection for the rapid on-site detection of Ca and Mg in surface water were 11.58 and 2.57 mg/L, respectively. We applied this method to assess the concentrations of Ca and Mg in authentic water samples collected from rivers and ponds. The recovery rates for Ca and Mg were 90.83–101.74% and 93.43–108.74%, respectively. This method is suitable for rapid, on-site, and highly sensitive monitoring of Ca and Mg concentrations in the environment.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2024
·
IF 3.8
Chunjiao Liu,Xiaodong Li
MXene can generate high-temperature pulses (HTP) by the physical/chemical coupling effect under laser irradiance and is a good initiator for laser ignition. The main obstacle in the application on laser ignition of MXene based materials is the incomplete oxidation and reduced energy output resulting from the inert TiO 2 passivation layer. In this study, we proposed an efficient approach to significantly enhance the thermal oxidation and energy release under laser irradiance by decorating hydrophobic 1H,1H,2H,2H-perfluorodecyltriethoxysilane (PFTE). The CFx produced by the decomposition of PFTE under laser irradiance can react with Ti atoms on the surface of MXene to prevent the formation of the oxide layer. This process releases a large amount of heat and completely oxidizes MXene. As expected, some rutile nano-crystals are distributed on the surface of fully oxidized MXene and the energy output of MXene/PFTE composite is 6.1–8.3 kJ/g which is much higher than pristine MXene. The mechanism of the thermal oxidation process is proposed to explain the enhanced energy output of the MXene/PFTE by thermal analysis and time-resolved emission spectrum (TR OES). Furthermore, the MXene/PFTE membrane significantly enhanced the laser ignitibility of 2,4,6,8,10,12-(hexanitrohexaaza)cyclododecane (CL-20) reducing the laser intensity and shortens the ignition time.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Yupeng Xie,Jie Wang,Yaocheng Hu,Jing Zhang,Yong Gao,Haipeng Li,Sheng Wang
The contamination of fission products ( 90 Sr and 137 Cs) on the metallic material (316L stainless steel) of alkaline spent fuel storage pond threatens to decommission nuclear facilities. Compared with previous studies unable to detect Cs on the surface of contaminated steel by laser-induced breakdown spectroscopy (LIBS), this study selected the emission lines of Sr II 407.74 nm and Cs I 455.77 nm as the analytical spectral lines of LIBS, and for the first time satisfactorily measured and analyzed the accumulation of Sr and Cs on the surface of 316L stainless steel for 7, 14, 21, 30 and 60 days, respectively. It was found during the accumulation, the concentration of Sr and Cs on the surface reached their maximum after 21 days, and relatively stabilized 30 days later. In addition, combined with the physicochemical characterizations, the contamination mechanism of Sr and Cs on 316L stainless steel was proposed, with the contaminants gradually diffusing from the oxide layer dissolved and damaged in the alkaline corrosive environment to the matrix. Strontium had two forms on the steel surface: SrCrO 4 in the oxide layer and SrCO 3 in the matrix, but the contamination of Cs was more inclined to the surface than Sr.
研究领域:
材料科学
·
核能工程
·
表面分析
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2024
·
IF 8
Panyu He,Xinglan Fu,Chenghao Wang,Yujiang Gou,Fengjing Cao,Hongwu Tian,Shixiang Ma,Yiyi Liang,Ting An,Guanglin Li
Tea infusion, as one of the most popular beverages, is favored by people around the world. However, tea plants accumulate heavy metals from the soil during growth, which are gradually transferred to the leaves and subsequently decomposed into the tea infusion after soaking in hot water. Long-term consumption of tea infusion containing heavy metals may lead to severe health issues, such as liver dysfunction and cancer. Therefore, rapid, precise, and highly sensitive detection of heavy metals in tea infusion becomes crucial for human health. Traditional methods, such as atomic absorption spectroscopy (AAS), suffer from long detection cycles, high costs, and the risk of secondary pollution from chemical extraction reagents. Thus, this paper presents a method, using laser-induced breakdown spectroscopy combined with electrospinning technology (LIBS-ES), to detect trace amounts of Cr and Cu in tea infusion. The electrospun nanofiber membranes (ENM) were modified with gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs), achieving ultra-sensitive detection of Cr and Cu. The experiment results show that the limits of detection for Cr and Cu are 5 μg/L and 10 μg/L, respectively. Moreover, this method was successfully applied to the detection of Cr and Cu in seven different types of tea infusion, achieving recovery rates of 99 %-106 % and 99 %-108 %, respectively. The method demonstrated good performance even under the interference of other ions at various concentrations, providing a reference for the rapid and highly sensitive detection of heavy metals in tea infusion.
研究领域:
食品科学
·
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2025
·
IF 4.3
Xiao Ma,Shaoqing Wang,Zilong Fu,Hongyi Gao,Yan Shao,Xiaoguang Li,Xiaoyun Yan
Laser-induced coal-based graphene (C-LIG) is a promising field in energy materials research that focuses on converting abundant coal resources into high-value graphene-based materials using low-cost and environmentally friendly processes. In this study, we successfully produced few-layer graphene from low-volatility bituminous coal under vacuum conditions using carbon dioxide infrared laser equipment. The results showed that the laser-induced graphene consists predominantly of 2–5 layers, featuring multipore structures with smaller-size pores on the pore walls. It also exhibits large interlayer spacing with the layers arranged in a long-range disorder, demonstrating high crystallinity and significant expansion of the aromatic layers. Notably, the interlayer spacing increases as the number of graphene layers decreases. When used as an anode material for lithium–ion batteries, C-LIG demonstrates a high specific capacity of 330 mA h g–1 at 0.1 A g–1, outperforming commercial graphite-based batteries. The expended interlayer spacing and unique pore structure promote rapid lithium–ion transfer, enhancing the storage performance. These findings suggest that C-LIG holds great potential for applications in electrochemical energy storage.
研究领域:
材料科学
·
能源研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2021
·
IF 3.512
Baojun Ding,Qiunan Zhang,Cheng Yang,Wenbo Yang,Junbo Liu,Chong Li,Shengyang Tao
Nowadays, heavy metal pollution has attracted wide attention. Many electrochemical methods have been developed to detect heavy metal ions. The electrode surface usually needs to be modified, and the process is complicated. Herein, we demonstrate the fabrication of electrodes by direct laser sintering on commercial polymer films. The prepared porous carbon electrodes can be used directly without any modification. The electrodes were fixed in a 3D-printed flow reactor, which led to very little analyte required during the detection process. The velocities of the analyte under stirring and flowing conditions were simulated numerically. The results prove that flow detection is more conducive to improving detection sensitivity. The limit of detection is about 0.0330 mg/L for Pb2+. Moreover, the electrode has been proved to have good repeatability and stability.
研究领域:
环境科学
·
材料科学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2019
·
IF 3.192
Jiangyou Long,Jianguo Li,Miaoni Li,Xiaozhu Xie
Conductive metallic micropatterns on transparent glass substrates are desired in lots of applications, e.g. electrofluidic devices and micrototal analysis systems. Due to the significant differences in material properties between metal and glass, the fabricated metallic micropatterns prone to show limited bonding strength to the glass substrates. In this paper, microgrooves with porous edge areas are prepared by a laser-induced backside wet etching (LIBWE) method. In the subsequent electroless plating process, this peculiar surface structure enables fast deposition of copper on these areas without further treatment of the surface. Moreover, due to the strong anchor effect caused by the porous microstructures, the obtained copper micropatterns show high bonding strength to the glass substrate. No damage or peeling is observed under 20-min sonication in water and repeated scotch tape test. These micropatterns can even survive from surface polishing by sandpapers. We also demonstrated that this copper micropatterns with low resistivity (1.9 μΩ·cm) could be used for rapid heating of localized surface areas, which may be a potential choice for various microsystems.
研究领域:
材料科学
·
微纳米制造
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Miao Zhang,Yongqiao Zhu,Dawei Li,Peizhong Feng,Cheng Xu
In this study, HfO 2 films were prepared using the sol–gel method with HfCl 4 as a precursor, HNO 3 as a hydrolysis inhibitor and polyethylene glycol as an additive. Investigations were then made into the properties and laser damage characteristics of the films after annealing at different temperatures. The prepared films have high transmittance, low absorption and high laser-induced damage threshold (LIDT). Specifically, the LIDT of the film was as high as 31.6 J/cm 2 after annealing at 353 K, and it gradually dropped to 21.7 J/cm 2 after annealing at 573 K, indicating its strong resistance to high temperature. This study reported a novel method for preparing sol–gel HfO 2 films with high LIDT and pinpointed the potential application of the films under high-temperature conditions.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2017
·
IF 4.162
Sheng Niu,Lijuan Zheng,Abdul Qayyum Khan,Guang Feng,Heping Zeng
A fast and sensitive analysis for trace level heavy metals in aqueous solution was realized by using an improved laser induced breakdown spectroscopy (LIBS) methodology. Solutions containing heavy metal elements, Ni, Cr, and Cd, were concentrated in a laser-pretreated area (25 × 20 mm 2 ) of a polished aluminum target surface, wherein pretreated grooves enabled homogeneous distribution of the metallic solutions in the well-defined area, and laser ablation of the aluminum target produced unique plasma excitation of various metallic ions . For 1-mL solutions deposited, we obtained an analytical precision of about 7% relative standard deviation (RSD), and limits of detection (LODs) of 22, 19, and 184 μg/L for Ni, Cr, and Cd, respectively. Moreover, the laser-pretreated metallic microstructure allowed more solution deposited with the help of a hot plate, which supported improvement of LODs to sub-μg/L level for Cr and Ni and μg/L level for Cd with about 20-mL solution engaged in the enrichment processes. The applicability of the proposed methodology was validated on certified reference materials and real river water.
研究领域:
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）