Article
Chemistry, Analytical
Baha Ondes, Fatma Akpinar, Murat Uygun, Mihrican Muti, Deniz Aktas Uygun
Summary: A highly stable urea biosensor was prepared by immobilizing urease enzyme onto nanoparticles, showing a detection limit of 0.77 mu M and a linear concentration range of 0.01 mM-500 mM. The biosensor system exhibited high repeatability and retained a certain level of activity after long-term storage. Interference from common interferents was found to be negligible, and the biosensor was proven suitable for detecting urea in artificial human serum.
MICROCHEMICAL JOURNAL
(2021)
Article
Engineering, Environmental
Salhah D. Al-Qahtani, Hanan K. Alzahrani, Omer A. Azher, Zeid O. Owidah, Matokah Abualnaja, Turki M. Habeebullah, Nashwa M. El-Metwaly
Summary: A high-sensitivity viscose fabric was developed for colorimetric recognition of urea in fluids using co-encapsulated calcium alginate nanoparticles. Extracted anthocyanin from red-cabbage and urease enzyme were studied for their role in the fabrication of a biosensor on fabrics. The colorimetric changes of the fabric were monitored with increasing urea concentration, showing a shift in absorbance spectra and color variations.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Cheol-Kyun Choi, Samy M. Shaban, Byeong-Seok Moon, Do-Gi Pyun, Dong-Hwan Kim
Summary: This study developed a rapid and reliable colorimetric urea biosensor assisted by a smartphone, with high selectivity, sensitivity, and reliability. It enables direct diagnosis of human urine and paves the way for daily monitoring systems of renal and hepatic dysfunction diseases.
ANALYTICA CHIMICA ACTA
(2021)
Article
Polymer Science
Mohamed H. El-Newehy, Hany El-Hamshary, Waheed M. Salem
Summary: Cellulose, a widely-used material, was utilized as a carrier for urease enzyme and tricyanofuran hydrazone to develop a novel fibrous film sensor. The sensor can detect urea visually with rapid response time and low detection limits. The morphology of the nanofibrous films was characterized using various analytical tools, showcasing the successful immobilization of urease enzyme and TCFH onto cellulose nanofibers.
Article
Chemistry, Multidisciplinary
Nur Izzati Zakaria, Rosmawani Mohammad, Sharina Abu Hanifah, Azrilawani Ahmad
Summary: In this study, an optical biosensor for urea based on functionalised calcium carbonate nanoparticles was successfully developed. The biosensor showed a colorimetric indication of urea concentrations and had a wide linear response range, low detection limit, good reproducibility, and no interference from major cations. The fabricated biosensor demonstrated no significant difference with the standard method for urea determination in urine samples.
ARABIAN JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Analytical
Yao Wang, Yang Zhang, Yuedan Wang, Rufeng Zhu, Yuanli Chen, Xue Liu, Jia Xu, Mufang Li, Dong Wang
Summary: A cotton yarn biosensor based on electrochemical transistor functionalized with MWCNT and PANI was developed for the detection of urea. The transistor showed high on/off current ratio, fast response time, and good operational stability, allowing for monitoring urea in a wide linear range. The sensor demonstrated superior reproducibility and specificity, confirming its potential for practical applications in biological detection in body fluids.
Review
Environmental Sciences
Marta Klimczyk, Anna Siczek, Lech Schimmelpfennig
Summary: The addition of urease inhibitor NBPT to urea fertilizers can reduce ammonia emissions, while nitrification inhibitors may lead to an increase in ammonia emission. Factors such as dose and date of application, method of application, type of soil and pH, as well as atmospheric conditions, also have an impact on ammonia emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Multidisciplinary
Amrish Prabakaran, Bahrudeen Shahul Hameed, K. S. Shalini Devi, Uma Maheswari Krishnan
Summary: A promising electrochemical biosensor was developed for the direct detection of urea, utilizing urease enzyme and a nanointerface consisting of gold nanoparticle decorated Prussian blue nanocubes and multi-walled carbon nanotubes. The sensor showed a linear sensing range between 1 and 10 mM urea concentration with a response time of 20 s at 0.2 V vs. Ag/AgCl, and has a detection limit and sensitivity values of 0.32 mM and 0.108 mu A/mM, respectively. The biosensor demonstrated good selectivity and was validated with rat blood serum.
Article
Polymer Science
Natalia Guerrero-Alburquerque, Shanyu Zhao, Daniel Rentsch, Matthias M. Koebel, Marco Lattuada, Wim J. Malfait
Summary: Urea, as an alternative to KOCN, shows potential for grafting ureido groups onto amines in aqueous media due to its low cost, non-toxicity, and biocompatibility. Reaction times are almost independent of substrate and pH, but excess urea is required for practically feasible reaction rates.
Article
Chemistry, Analytical
Farzaneh Shalileh, Hossein Sabahi, Mohammad Golbashy, Mehdi Dadmehr, Morteza Hosseini
Summary: A novel colorimetric paper-based urea biosensor was developed for the rapid and accurate detection of urea adulteration in milk. The biosensing mechanism relies on the color change of anthocyanin due to the urease-mediated hydrolysis of urea and pH increment. The biosensor showed promising results for the detection of urea in milk samples, even in the presence of other adulterants and interferents.
ANALYTICA CHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Yuan Yuan, Yuhan He, Dongni Pei, Liujuan Tong, Shengqiang Hu, Lin Liu, Xinyao Yi, Jianxiu Wang
Summary: Urease-functionalized near-infrared (NIR) light-responsive gold nanoflowers (AuNFs) were used as a sensing platform for urea assay. By changing the temperature and activity of the urease-AuNFs composites, the concentration of urea could be rapidly detected. This method conveniently measured urea in blood samples within 10 minutes, and the results were in good agreement with clinical results.
MICROCHEMICAL JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Reena K. Sajwan, Purnima Sharma, G. B. V. S. Lakshmi, Pratima R. Solanki
Summary: A fluorescence Turn-On based strategy using MPA-CdSe QDs was utilized for urea determination, with a detection range from 1 to 120 mM and a lower detection limit of 1 mM. The pH sensitivity of MPA-CdSe QDs was key in detecting urea through the enzymatic reaction with urease and the release of ammonia.
Article
Multidisciplinary Sciences
Fan Jiang, Lei Wang, Nana Jin, Jing Yuan, Yanbin Li, Jianhan Lin
Summary: An electrochemical biosensor combining magnetic grid based bacterial separation and enzymatic catalysis based signal amplification was developed for Salmonella detection. The sensor was able to detect 50 CFU/mL Salmonella typhimurium in 1 hour.
Article
Chemistry, Analytical
Fares Zouaoui, Nadia Zine, Abdelhamid Errachid, Nicole Jaffrezic-Renault
Summary: In this article, a mathematical model was developed to optimize the configuration of a urea biosensor. The model was validated using experimental data and can simulate the biosensor's response under different conditions, guiding experiments, improving analytical performance, and reducing development costs.
Article
Materials Science, Multidisciplinary
J. Fernandez-Catala, A. Berenguer-Murcia, D. Cazorla-Amoros
Summary: In the synthesis of TiO2-MWCNT composites, using ultrasound probe treatment for MWCNT dispersion can improve the catalytic activity for propene photo-oxidation. The key factors for enhanced photocatalytic activity include good dispersion of MWCNT and an increase in surface oxygen functionalities.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Chemistry, Physical
Qi-Wen Chen, Ze-Qing Guo, Jian-Ping Zhou
Summary: Multifunctional continuous solid solutions NFMTO-x were successfully synthesized via a one-step hydrothermal method by controlling the ratio of Mg and Fe. The NFMTO-x materials exhibited enhanced visible light response, effective adsorption and photocatalytic degradation of organic pollutants, CO2 methanation capability, and easy recyclability due to their magnetic properties. This research provides a significant multifunctional material for water purification.
APPLIED SURFACE SCIENCE
(2024)
Review
Chemistry, Physical
George E. Stan, Maziar Montazerian, Adam Shearer, Bryan W. Stuart, Francesco Baino, John C. Mauro, Jose M. F. Ferreira
Summary: Bioactive glasses have the ability to form strong bonds with tissues and release therapeutic ions. However, their biomechanical compatibility limits their use in load-bearing applications. The use of magnetron sputtering technology to fabricate BG coatings shows promise in improving their efficacy and potential for application.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zhaoxuan Wang, Zhicheng Yan, Zhigang Qi, Yu Feng, Qi Chen, Ziqi Song, Meng Huang, Peng Jia, Ki Buem Kim, Weimin Wang
Summary: The corrosion behavior of Fe-60 and Fe-83 ribbons in 0.6 M NaCl was studied. Fe-60 exhibited a local corrosion mode and formed a stable passivation film with higher corrosion resistance, while Fe-83 showed a combination of local and global corrosion modes and had lower corrosion resistance. Controlling the precipitation of nanocrystalline phases and increasing the POx content in the passivation film significantly improved the corrosion resistance of Fe-based glassy alloys.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hao-Kai Peng, Sheng-Yen Zheng, Wei-Ning Kao, Ting-Chieh Lai, Kai-Sheun Lee, Yung- Hsien Wu
Summary: This study investigates the effects of high energy/fluence proton radiation on the performance of HfZrOx-based FeFETs memory with different Zr content. The results show that the characteristics of FeFETs are influenced by proton radiation, and the extent of the influence depends on the Zr content. FeFETs with 50% Zr content exhibit minimal changes in memory window and demonstrate good endurance and retention performance.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Zongyi Yue, Guangyi Wang, Zengguang Huang, Sihua Zhong
Summary: In this study, AZO and ITO films were successfully tuned as excellent passivation layers for c-Si surfaces, achieving effective minority carrier lifetime and outstanding optical properties through the optimization of annealing temperature and interfacial silicon oxide.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Martin Hruska, Jan Kejzlar, Jaroslav Otta, Premysl Fitl, Michal Novotny, Jakub Cizek, Oksana Melikhova, Matej Micusik, Peter Machata, Martin Vrnata
Summary: This paper presents a detailed study on the hydrogen sensing capabilities of highly nanoporous black gold films. The films exhibit fast response and recovery times at low temperatures. Different levels of nanoporosity were prepared and tested to investigate the sensing properties, and it was found that nanoporous black gold is suitable for hydrogen sensing. The sensitivity of the film depends on its nanoporosity.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yupu Wang, Gaofeng Teng, Chun To Yiu, Junyi Zhu
Summary: In the study of BM-SCO and HSCO thin films, it was found that H vacancies tend to prefer sites near the external surface or oxygen vacancy channels (OVCs), while H interstitials prefer sites of oxygen on a layer that contains six-fold coordinated Co. These findings not only enrich the understanding of complex surface phenomena of defect formation but also provide an explanation for the reversibility during phase transformation.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jiafeng Lu, Linping Teng, Qinxiao Zhai, Chunhua Wang, Matthieu Lancry, Ye Dai, Xianglong Zeng
Summary: In this study, we achieved full control of fiber nanograting orientation by manipulating laser polarization, and tailored space variant fiber nanogratings, which expanded the diversity in fiber nanograting engineering.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yibo Liu, Yujie Tao, Yue Liu, Qi Sun, Qinrong Lin, Kexin Kang, Qinghua Zhang, Qingjie Sun
Summary: This study investigates the wettability of the Ti-Cu-Fe multi-metal system, specifically the wetting behaviors of CuSi3 droplets on TC4 and 304SS plates. The results show that the CO2 + Ar gas atmosphere significantly affects interfacial mass transfer, thus influencing the wettability of the systems.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Jimei Liu, Fei Wang, Rong Guo, Yuqi Liu, Mengyu Zhang, Jaka Sunarso, Dong Liu
Summary: This study developed Co/MXene composites with anti-corrosion properties by varying the cobalt content. These composites exhibited remarkable electromagnetic absorption performance and high resistance to corrosion under various corrosive conditions. The study also revealed the mechanism of electron transfer from cobalt to MXene and the electromagnetic dissipation behavior originated from polarization loss alone.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Moujie Huang, Yongsong Ma, Jingbo Yang, Lingyun Xu, Hangqi Yang, Miao Wang, Xin Ma, Xin Xia, Junhao Yang, Deli Wang, Chuang Peng
Summary: Strong metal-support interactions (SMSIs) are important for enhancing catalytic activities and stability in thermal catalysis. This study demonstrates a method to create SMSIs in electrocatalysis using carbon nanotubes and Ru nanoparticles, resulting in excellent catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Ravi Trivedi, Brinti Mondal, Nandini Garg, Brahmananda Chakraborty
Summary: This study explores the potential of biphenylene as a nanocarrier for the delivery of the anticancer drug cisplatin. It is found that biphenylene offers physical stability, rapid release rate, solubility, and bio-compatibilities compared to other nanocarriers. The adsorption of cisplatin on the surface of biphenylene involves charge transfer from cisplatin to biphenylene. The drug is shown to be released at body temperature in an acidic environment. Biphenylene also exhibits excellent cytotoxicity activity and cellular uptake of the drug. Overall, biphenylene shows promise as a potential nanocarrier for cisplatin delivery.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Hyun Jeong, Hyeong Chan Suh, Ga Hyun Cho, Rafael Salas-Montiel, Hayoung Ko, Ki Kang Kim, Mun Seok Jeong
Summary: In this study, a potential platform to enhance Raman scattering and increase the number of observable Raman modes in monolayer transition metal dichalcogenides (TMDs) was proposed. The platform consisted of large-scale arrays of gold micropillars (MPs), which were able to enhance the Raman intensity of TMDs and make difficult-to-detect Raman modes observable. The platform showed great industrial advantages and wide applicability due to its low cost, simple process, large controllable area, and short process time.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Yasir Abbas, Shafqat Ali, Sajjad Ali, Waqar Azeem, Zareen Zuhra, Haoliang Wang, Mohamed Bououdina, Zhenzhong Sun
Summary: In this study, FeOx@SPNO-C core-shell nanospheres as a catalyst for degradation of sulfamethoxazole (SMX) were successfully synthesized. The synergistic interaction between FeOx and SPNO-C, high carbon charge density, and the presence of C = O groups and N/Fe-Nx sites were found to be key factors for the enhanced degradation of SMX.
APPLIED SURFACE SCIENCE
(2024)
Article
Chemistry, Physical
Qiaoting Yang, Yuxiao Gong, Yan Qian, Zhou-Qing Xiao, Serge Cosnier, Xue-Ji Zhang, Robert S. Marks, Dan Shan
Summary: This study proposes a hierarchical confinement strategy to design Prussian blue nanoparticles (PB NPs) with satisfactory electrocatalytic ability and stability. The catalytic synthesis of PB NPs is achieved through a hydrothermal process, and the as-prepared PB@NH2MIL exhibits efficient electronic transmission and enhanced electrocatalytic properties.
APPLIED SURFACE SCIENCE
(2024)