Article
Nanoscience & Nanotechnology
Guangming Xu, Xilong Shen, Lei Zhang, Jie Tang, Chuan He, Ziqiang Zhou, Tian Xu, Meifeng Xu, Yonglong Jin, Chaonan Wang
Summary: In this study, a flexible and transparent silver/polystyrene/polydimethylsiloxane (Ag/PS/PDMS) substrate with high density of hot spots and satisfactory uniformity was developed using a cost-effective approach. The substrate demonstrated high sensitivity and desirable uniformity with a meat-ball like surface structure, and showed great potential for in-situ food safety analysis.
Article
Spectroscopy
Yusheng Zhang, Yong Wang, Anran Liu, Songqin Liu
Summary: We have developed a new flexible surface-enhanced Raman scattering (SERS) substrate for the selective and sensitive determination of thiram residue in fruits and juices. The substrate consists of gold nanostars (Au NSs) with a multi-branching structure, which are self-assembled on aminated Polydimethylsiloxane (PDMS) slides through electrostatic interaction. The SERS method can distinguish thiram from other pesticide residues by measuring the characteristic peak intensity at 1371 cm-1. The SERS substrate exhibits a good sensitivity, stability, and selectivity for the detection of thiram in food samples and can be used as a common method for pesticide detection in food samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Spectroscopy
Muhammad Haroon, Muhammad Ashraf, Nisar Ullah, Muhammad Nawaz Tahir, Abdulaziz A. Al-Saadi
Summary: In this study, a palladium-based highly reduced graphene oxide (Pd-HRG) with localized surface plasmon resonance (LSPR) properties was synthesized and used as an effective surface-enhanced Raman scattering (SERS) substrate for the highly sensitive detection of procaine. The concentration detection of procaine samples was optimized by adjusting pre-concentration parameters. The Pd-HRG nanocomposite exhibited remarkable LSPR response with a Raman enhancement factor of 8.7 x 10(2). The Pd-HRG was employed to modify a fluorine doped tin oxide electrode (Pd-HRG/FTO), resulting in an enhancement factor of 7.5 x 10(4) using the EC-SERS technique. The electronic and surface properties of the synthesized Pd-HRG and functionalized FTO electrode were evaluated using various characterization techniques. Quantum chemical calculations were conducted to investigate the interaction between procaine molecules and the nanostructured surface model. Pd-HRG, with its efficient and cost-effective fabrication, shows promise as an EC-SERS substrate for the detection of organic therapeutic drugs.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Materials Science, Multidisciplinary
Kroerit Maneejark, Narong Sangwaranatee, Noppadon Chamchoi, Narong Kulnides, Pacharamon Somboonsaksri, Saksorn Limwichean, Tawee Pogfay, Sukon Kalasung, Pitak Eiamchai, Viyapol Patthanasettakul, Nutthamon Limsuwan, Narit Triamnak, Noppadon Nuntawong, Mati Horprathum
Summary: In this study, a adsorbable SERS substrate with nano-in-micro rough structure was successfully fabricated on PDMS. The substrate exhibited high sensitivity for methylene blue and methamphetamine, making it suitable for trace detection and on-site drug screening.
Article
Chemistry, Analytical
Yaodi Zhu, Shijie Liu, Lijun Zhao, Na Wang, Mengya Li, Dong Liang, Gaiming Zhao, Weijia Liu, Lingxia Sun, Lina Xu, Miaoyun Li
Summary: This study presents a novel Au@AgNP self-assembly with PDMS film surface-enhanced Raman scattering (SERS) substrate for quick and highly sensitive detection of foodborne pathogens in beef. The method does not require bacterial culture and exhibits high reproducibility and Raman enhancement effect. It can effectively distinguish different classes of pathogens.
MICROCHEMICAL JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Peipei Zhang, Jing Wu, Su Wang, Jinghuai Fang
Summary: Triangular Au/Ag nanoparticle arrays with sub-10 nm gap were prepared using stress-induced local cracking and high expansion coefficient of flexible PDMS. The approach exhibited good controllability and repeatability for SERS analysis, showing great potential in surface trace detection.
Article
Nanoscience & Nanotechnology
Chaonan Wang, Meifeng Xu, Tian Xu, Yonglong Jin
Summary: Utilizing a replacement reaction approach, distinct Ag nanostructures were prepared on DVD and PDMS surfaces, with high SERS activity Ag nanoplates ingeniously transferred onto PDMS. The resulting Ag/PDMS substrates exhibited remarkable sensitivity, uniformity, and stability, demonstrating the potential for in situ detection on curved surfaces.
Article
Spectroscopy
Xiaoyuan Ma, Jie Xie, Zhouping Wang, Yin Zhang
Summary: A flexible SERS substrate based on PDMS modified with gold nanostars was developed for in-situ detection of pesticide residues on fruit surfaces. The substrate showed good signal uniformity, stability, and sensitivity, with the capability to directly detect pesticides in agricultural products on site without the need for sample preprocessing steps.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Physical
Yasemin Celik, Ayse Kurt
Summary: Hybrid SERS substrates combining noble metal nanoparticles and graphene-based materials offer a stable and cost-effective platform for SERS analysis, which shows great potential to promote the application of SERS for routine analyses.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Analytical
Qian Chen, Changli Shi, Lixia Qin, Shi-Zhao Kang, Xiangqing Li
Summary: A novel Cu2O-based SERS platform with special structure was successfully constructed, offering high sensitivity and stable response towards crystal violet molecules. The nanocomposite exhibited considerable SERS enhancement for CV detection, maintaining high performance even after multiple cycles and long-term exposure.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Yuri Kang, Hyeok Jung Kim, Sung Hoon Lee, Hyeran Noh
Summary: Paper is a popular platform material in sensor research, with porosity, large surface area, and biodegradability. A silver-chitosan nanocomposite layer was successfully fabricated on paper celluloses using a layer-by-layer method and pH-triggered chitosan assembly, achieving evenly anchored silver nanoparticles and a detection limit of 5.13 ppb for 4-aminothiophenol in SERS measurement. The material shows potential for further biosensing applications.
Article
Chemistry, Multidisciplinary
Jie Li, Qiutian She, Wenxi Wang, Ru Liu, Ruiyun You, Yaling Wu, Jingzheng Weng, Yunzhen Liu, Yudong Lu
Summary: Label-free surface-enhanced Raman scattering (SERS) analysis has great potential for the early diagnosis and screening of colon cancer. In this study, Ag NPs/CNC/GO nanocomposite film was successfully fabricated as a uniform SERS active substrate for the analysis of clinical serum. Combined with the PCA-LDA model, the nanofilm showed promising results for colon cancer screening.
Article
Engineering, Electrical & Electronic
Heena Sammi, Neha Sardana
Summary: A facile method for fabricating cost-effective, scalable, and flexible surface-enhanced Raman scattering substrate based on natural rose petal is discussed in this study. The substrate, created through a nano casting approach using rose petals as a template and PDMS as an elastomer, features an inverted texture. By depositing spherical and well-distributed gold nanoparticles onto the inverted texture, the substrate enhances the signal strength through the generation of local surface plasmon resonance and hot spots. The flexible substrate is capable of sensing low concentrations of organic pollutants and pesticides, and has shown good stability and reusability.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Review
Polymer Science
Guoshuai Liu, Kang Shi, Hui Sun
Summary: Hemicellulose, as a main component of agricultural and forestry biomass, has abundant source, biodegradability, nontoxicity and good biocompatibility. However, the mechanical properties and barrier properties of hemicellulose films are not sufficient, and modification for enhancement is still a challenge. Therefore, blending hemicellulose with nanofibers or nanoparticles has attracted research attention for efficient improvement in properties and cost efficiency in food packaging.
Article
Energy & Fuels
Sathiyamoorthy Murugesan, Muhammad Haroon, Tawfik A. Saleh, Abdulaziz A. Al-Saadi
Summary: Detection of sulfur-containing compounds in petroleum products is an important research topic, but the use of surface-enhanced Raman scattering (SERS) method has not been well explored. In this study, a nanocomposite material was employed to identify different concentrations of dibenzothiophene (DBT) in commercial diesel fuel, and the use of silver nanoparticles and zeolitic materials helped in enhancing Raman signals and reducing fluorescence background for low detection level.
Article
Chemistry, Analytical
Elias B. Santos, Chiara Valsecchi, Jaderson L. S. Goncalves, Luis F. Avila, Jacson W. Menezes
Article
Chemistry, Physical
D. A. Turchetti, C. Zanlorenzi, L. G. T. A. Duarte, R. F. S. Santos, T. D. Z. Atvars, R. A. Domingues, L. C. Akcelrud
JOURNAL OF PHYSICAL CHEMISTRY B
(2020)
Article
Physics, Multidisciplinary
Keshav Sharma, Nathalia L. Costa, Yoong Ahm Kim, Hiroyuki Muramatsu, Newton M. Barbosa Neto, Luiz G. P. Martins, Jing Kong, Alexandre Rocha Paschoal, Paulo T. Araujo
PHYSICAL REVIEW LETTERS
(2020)
Article
Chemistry, Analytical
Enzo V. H. Agressott, Thiago Alves de Moura, Nathalia Leal Marinho, Thiago de L. Vasconcelos, Francisco Afranio Cunha, P. B. A. Fechine, Antonio Gomes de Souza Filho, Alexandre R. Paschoal
VIBRATIONAL SPECTROSCOPY
(2020)
Article
Chemistry, Physical
Jie-Yi Yao, Anne Helene Fostier, Elias Barros Santos
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Materials Science, Multidisciplinary
Emerson C. G. Campos, Denis A. Turchetti, Alisson J. Santana, Raquel A. Domingues, Luis G. T. A. Duarte, Teresa D. Z. Atvars, Leni Akcelrud
Summary: The study presents a hybrid structure polymer complexed with europium ions, exhibiting luminescence sensitive to viscous chemical environments. The material shows dual-emission profile with red luminescence in DMF and DMSO, and blue emission in chloroform and toluene. DMSO and DMF are suggested to restrict intramolecular motion/rotation, minimizing non-radioactive energy losses and promoting europium luminescence.
Article
Physics, Multidisciplinary
Nathalia L. Costa, Keshav Sharma, Yoong Ahm Kim, Go Bong Choi, Morinobu Endo, Newton M. Barbosa Neto, Alexandre R. Paschoal, Paulo T. Araujo
Summary: The temperature dependence of the Raman C-band frequency of linear carbon chains can be used to evaluate their thermal properties within the Debye formalism, providing universal relations for quantities such as internal energy, heat capacity, coefficient of thermal expansion, thermal strain, and Gruneisen parameter in terms of the number of carbon atoms and temperature.
PHYSICAL REVIEW LETTERS
(2021)
Article
Polymer Science
Emerson C. G. Campos, Denis A. Turchetti, Cristiano Zanlorenzi, Raquel A. Domingues, Luis G. T. A. Duarte, Teresa D. Z. Atvars, Leni Akcelrud
Summary: The work explores the solvent effects on the photophysical properties of a terbium copolymer, indicating that the terbium emission is sensitive to the chemical environment and that an aggregation-induced emission phenomenon may occur in certain solvents. Theoretical studies suggest that the DMSO environment may optimize the energy transfer to the terbium ion.
Article
Polymer Science
Ru He, Raquel A. Domingues, Silvano Valandro, Kirk S. Schanze
Summary: In this study, the synthesis, characterization, and application of platinum poly-yne (NPtAP) as an organic light-emitting diode (OLED) emitter were successfully demonstrated. The use of N-heterocyclic carbene (NHC) ligands with chiral 2-ethylhexyl substituents helped enhance the photoluminescence quantum yield of the platinum poly-yne, while limiting interchain interactions. The prototype solution-processed OLEDs employing NPtAP displayed yellow-green electroluminescence (EL).
Article
Materials Science, Multidisciplinary
Andreia de Morais, Luiz Gustavo T. A. Duarte, Denis A. Turchetti, Rodrigo A. Mendes, Jilian N. de Freitas, Teresa D. Z. Atvars, Fernando H. Cristovan, Raquel A. Domingues
Summary: A novel green-emitting terpolymer PFABT containing electron-pushing and electron-pulling units was synthesized via Suzuki coupling reaction. The excitation states of anthracene and benzothiadiazole in the copolymers were investigated, showing different emission characteristics. Blends of PFABT with PVK in various ratios exhibited increased energy transfer efficiency, impacting the performance of polymer light-emitting diodes emitting green light.
Article
Engineering, Chemical
Carlos Henrique Vieira Brito, Diego Coelho Sanches Gloria, Elias Barros Santos, Raquel Aparecida Domingues, Gustavo Targino Valente, Nirton Cristi Silva Vieira, Maraisa Goncalves
Summary: In this study, the combination of activated carbon with graphene oxide was found to improve the adsorption efficiency for pharmaceutical contaminants. The composite showed higher surface area and oxygen content, and exhibited higher adsorption capacity than activated carbon alone. The adsorption efficiency of both activated carbon and activated carbon/graphene oxide composite was favored at pH values below 10.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Diego Coelho Sanches Gloria, Carlos Henrique Vieira Brito, Thais Aline Prado Mendonca, Tayra Rodrigues Brazil, Raquel Aparecida Domingues, Nirton Cristi Silva Vieira, Elias Barros Santos, Maraisa Goncalves
Summary: A photocatalyst consisting of titanium dioxide (TiO2) and activated carbon (AC) was prepared using a sol-gel method. Among the four different types of catalysts, TiO2/AC-30 showed the highest photocatalytic activity and achieved about 95% of Paracetamol degradation. TiO2/AC-30 can be considered as a promising candidate for water purification containing emergent contaminants.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Rochele Ferreira Silva Diniz, Thais Aline Prado Mendonca, Raquel Aparecida Domingues, Maraisa Goncalves
Summary: The study developed iron/carbon-based catalysts prepared from biodiesel residues, glycerin, showing efficient methylene blue oxidation performance and high stability.
Article
Chemistry, Multidisciplinary
Aline Kaori Katanosaka, Anne Helene Fostier, Elias Barros Santos
Summary: The study introduced an interdisciplinary experiment on nanotechnology focusing on silver nanoparticles (AgNPs) and their stability. The nanoparticles were synthesized using chitosan as a capping agent, and their size distribution was determined via transmission electron microscopy. The research explored the oxidation of AgNPs in the presence of various ions, showing different intensities of oxidation which could be explained using an electrochemistry approach. The simplicity of the procedure makes it relevant for graduate-level or upper-level undergraduate experimental course preparations in chemistry laboratories.
Article
Materials Science, Multidisciplinary
Deyong Zheng, Huihui Jin, Yucong Liao, Pengxia Ji
Summary: In this study, a highly stable and efficient catalyst, fluorine-doped Co3O4 (F-Co3O4), was developed for hydrogen production by water electrolysis. The F-Co3O4 catalyst exhibited a remarkable reduction in overpotential and demonstrated excellent stability for over 100 hours.
Article
Materials Science, Multidisciplinary
Ziwen Lv, Jintao Wang, Fengyi Wang, Jianqiang Wang, Fuquan Li, Hongtao Chen
Summary: Adding Cu6Sn5 nano particles can effectively inhibit the overgrowth of intermetallic compounds at the interfaces of solder joints in electronic devices, providing a solution to this issue. A new growth mechanism of intermetallic compounds at the interfaces was identified.
Article
Materials Science, Multidisciplinary
Jun Wang, Jiawei Chen, Wanru Liao, Fangyang Liu, Min Liu, Liangxing Jiang
Summary: A BiOI/AgI/Ag plasmonic heterostructure photocathode was successfully designed through electrodeposition, ion-exchange, and illumination methods. This photocathode exhibits superior performance in photoelectrochemical water splitting.
Article
Materials Science, Multidisciplinary
Xiaoxiao Liu, Xianxian Zhou, Xiaotao Ma, Qinbo Yuan, Shibin Liu
Summary: In this study, the authors propose a method to accelerate the reaction of polysulfides in lithium-sulfur batteries using a Ni@OC Mott-Schottky heterojunction as a catalyst. The experimental results demonstrate that the charge redistribution at the Ni@OC interface accelerates electron transfer and enhances catalytic activity, leading to improved reaction kinetics and battery performance.
Article
Materials Science, Multidisciplinary
Dayou Ma, Mohammad Rezasefat, Joziel Aparecido da Cruz, Sandro Campos Amico, Marco Giglio, Andrea Manes
Summary: The matrix has a significant effect on the impact resistance of composite materials. Replacing a brittle polymer with a more flexible one can improve impact resistance, but it poses challenges to standard testing methods. This study designs a new fixture for testing the low-velocity impact of soft composites and investigates the effect of the fixture on the mechanical performance.
Article
Materials Science, Multidisciplinary
Lingchang Wang, Qihang Yang, Huzhen Li, Ming Wei, Qian Wang, Zhenzhong Hu, Mengmeng Zhen
Summary: Bronze titanium dioxide (TiO2(B)) is a promising anode material for lithium-ion batteries due to its high specific capacity. However, its practical applications are hindered by poor conductivity and limited electrochemical kinetics. In this study, TiO2(B)-carbon nanosheets heterostructures are synthesized to enhance the cycling performance and rate capability of TiO2(B).
Article
Materials Science, Multidisciplinary
Atul Thakur, Ritesh Verma, Ankush Chauhan, Fayu Wan, Preeti Thakur
Summary: In this study, BaFe12O19 and BaFe12O19: Epoxy (50:50) nanocomposites were synthesized using the co-precipitation method. The structural information and material properties, such as crystallite size and electrical conductivity, were characterized by XRD, FESEM, EDX, and TEM techniques.
Article
Materials Science, Multidisciplinary
Jingyu Wu, Xinyan Ma, Yong Yang
Summary: A well-defined CoS2@NC(CS-500) hierarchical binder-free catalyst cathode is constructed through in-situ grown of ZIF-67 on carbon cloth and high-temperature carbonization. The cathode shows excellent reaction kinetics and electrochemical performance, providing inspiration for developing advanced Li-CO2 battery catalysts.
Article
Materials Science, Multidisciplinary
Svetlana M. Posokhova, Vladimir A. Morozov, Kirill N. Boldyrev, Dina Deyneko, Erzhena T. Pavlova, Bogdan I. Lazoryak
Summary: This study explores the impact of synthesis method and composition on the structure and luminescence properties of K5Eu1-xHox(MoO4)4 with the palmierite-type matrix. The co-doping of Eu3+ and Ho3+ ions plays a critical role in manipulating charge transfer and luminescence efficiency in the visible and infrared regions.
Article
Materials Science, Multidisciplinary
Jian Wang, Yeting Tao, Jingsheng Wang, Youtian Tao
Summary: A new electron-transport material iTPyBI-CN is developed through non-catalytic C-N coupling reaction. It exhibits better electroluminescence efficiency in organic light-emitting diodes compared to the commercial material TPBI, due to its twisted geometry and higher energy levels.
Article
Materials Science, Multidisciplinary
Tao Zhu, Feng Huang, Shuo Li, Yang Zhou
Summary: This article combines XRD analysis and microscopic structural observation to investigate the changes in limestone after high-temperature treatment. It finds that 500 degrees C is the critical temperature for crystalline and spatial arrangement changes in limestone, and the thermal conductivity, specific heat capacity, and heat storage coefficient gradually decrease after thermal treatment.
Article
Materials Science, Multidisciplinary
Muhammad Haekal Habibie, Fransiska Sri Herwahyu Krismastuti, Abdi Wira Septama, Faiza Maryani, Vivi Fauzia
Summary: This study focuses on the synthesis of zinc oxide nanostructure from zinc recovered from galvanization ash and highlights its potential as a sustainable source of zinc and as an antibacterial agent.
Article
Materials Science, Multidisciplinary
Jingyi Li, Yixin Xing, Wei Gu, Shousi Lu
Summary: In this study, PC@CaP microparticles were fabricated using biomimetic mineralization. The results showed that under environmental stress, PC@CaP exhibited improved stability and antioxidative activity, indicating its potential use in high-added value fields.
Article
Materials Science, Multidisciplinary
Yan Liu, Shunyou Chen
Summary: In this study, TNTs were used as a drug carrier and modified with ZIF-8 and silk fibroin to obtain a new drug loading platform. The results showed that this drug-loaded platform had a good drug release effect in vitro and could promote cell proliferation and osteogenic differentiation.
Article
Materials Science, Multidisciplinary
Chunhui Zhu, Wentao Wang, Qing Zhen, Xinning Huang, Shixin Li, Shaochang Wang, Xiaoping Ma, Xiaoxia Liu, Yalong Jiao, Kai Sun, Zhuangzhi Li, Huaixin Yang, Jianqi Li
Summary: A type of stacking fault is revealed in e-InSe crystal, which is associated with a small stacking-fault energy and shows exceptional plasticity.
