Nano最新文献

{"title":"Unlocking the Potential of Trans-Himalayan High-Altitude Seabuckthorn (Hippophae rhamnoides) Plants in the Green Synthesis of Silver Nanoparticles Against Drug-Resistant Foodborne Pathogens: A Step Towards Sustainable Food Safety Goals","authors":"Richa Arora, Vijay Kumar Bharti, Shubhankhi Dey","doi":"10.1142/s1793292024500243","DOIUrl":"https://doi.org/10.1142/s1793292024500243","url":null,"abstract":"<p>Controlling foodborne pathogens is challenging due to the new emergence of antimicrobial resistance to conventional antimicrobials. Therefore, new alternative antimicrobials need to be developed to control foodborne pathogens and avoid microbial resistance. Furthermore, the potential of trans-Himalayan high-altitude seabuckthorn (<i>Hippophae rhamnoides </i>) plants has not been explored much for the synthesis of silver nanoparticles having antibacterial properties. Hence, this study investigated the development of long-term stable silver nanomaterials using the aqueous extract of seabuckthorn leaves through a green-synthesis approach and evaluated their antibacterial efficacy. These synthesized nanomaterials were characterized along with their stability using UV spectrometry for lambda max (<span><math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"><mi>λ</mi><mo>max</mo></math></span><span></span>) characteristics. Further, the nanoparticles were evaluated for zeta potential (mV), polydispersity index, particle size distribution (nm), electrophoretic mobility (<span><math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"><mi>μ</mi></math></span><span></span>mcm/Vs) and conductivity (mS/cm). The seabuckthorn silver nanoparticles are of 260<span><math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"><mspace width=\".17em\"></mspace></math></span><span></span>nm size and stable (−15<span><math altimg=\"eq-00004.gif\" display=\"inline\" overflow=\"scroll\"><mspace width=\".17em\"></mspace></math></span><span></span>mV zeta potential) with good antioxidant and antibacterial properties against two typical food pathogens, e.g., <i>Escherichia coli</i> (MTCC 3222) and <i>Salmonella typhimurium</i> (MTCC 3224). Hence, this study developed an eco-friendly, rapid, low-cost green synthesis method for the development of seabuckthorn-coated, stable silver nanoparticles with good antibacterial activity against foodborne pathogens.</p>","PeriodicalId":18978,"journal":{"name":"Nano","volume":"58 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140808911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arc Discharge Synthesis and Multistep Purification of Multiwall Carbon Nanotubes","authors":"Madni Shifa, Zaigham Saeed Toor, Fawad Tariq","doi":"10.1142/s1793292024500073","DOIUrl":"https://doi.org/10.1142/s1793292024500073","url":null,"abstract":"<p>This research work describes the cost-effective synthesis and purification of multiwall carbon nanotubes (MWCNTs). Synthesis of CNTs was carried out in distilled water between two electrodes using the electric arc discharge (EAD) method. EAD is a simple and straightforward route in which an electric arc is generated between graphite electrodes through DC power source to produce soot which contains MWCNTs along with impurities. The deposited soot containing MWCNTs was then chipped off and purified. In this case, multistep purification scheme was opted to remove unwanted impurities from produced MWCNTs. Purification route comprised thermal treatment, chemical treatment and a combination of both to yield pure MWCNTs. Thermal treatments were carried out in normal air and under controlled flow of oxygen at different temperatures whereas chemical treatment was performed using acidic solution. Thermo gravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD) were carried out before and after purification treatments to investigate the outcome of employed treatments. Results showed that the thermal or chemical treatment alone is not sufficient to remove impurities from soot. Moreover, the introduction of an oxide group through chemical treatment reduces the oxidization temperature of graphitic particles. It was found that the chemical treatment followed by thermal annealing under the controlled flow of oxygen is the most appropriate method for successful purification of MWCNTs synthesized via EAD method.</p>","PeriodicalId":18978,"journal":{"name":"Nano","volume":"17 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Electromagnetic Characteristics and Microwave Absorbing Properties of a Novel Stainless Steel Powder","authors":"Jun Zhang, Xiaoying Liu, Jiangbo Huang, Hua Chen, Haochuan Wan, Pingan Yang","doi":"10.1142/s1793292024500061","DOIUrl":"https://doi.org/10.1142/s1793292024500061","url":null,"abstract":"&lt;p&gt;In order to solve the problem of insufficient oxidation resistance and corrosion resistance of magnetic metal absorbent represented by carbonyl iron powder, a wave absorbing composite material which consists of different filling mass proportions of the atomized electrolytic stainless steel powder and paraffin wax is investigated. The electromagnetic (EM) characteristics and absorbing performance of the proposed composite material were tested with Agilent N5234A vector network analyzer in a frequency range of 2–18&lt;span&gt;&lt;math altimg=\"eq-00001.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;mspace width=\".17em\"&gt;&lt;/mspace&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;GHz. The experimental results show that the real and imaginary parts of the dielectric permittivity of stainless steel powder/paraffin composites will increase with the filling mass fraction in the test frequency band, while the real part of the permeability &lt;span&gt;&lt;math altimg=\"eq-00002.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;μ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;′&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt; decreases with the increase of the mass fraction, and the imaginary part &lt;span&gt;&lt;math altimg=\"eq-00003.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mi&gt;μ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;′&lt;/mi&gt;&lt;mi&gt;′&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt; increases with the increase of the mass fraction. At a thickness of 3&lt;span&gt;&lt;math altimg=\"eq-00004.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;mspace width=\".17em\"&gt;&lt;/mspace&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;mm, with the filling mass fraction increasing from 20&lt;span&gt;&lt;math altimg=\"eq-00005.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;mspace width=\".17em\"&gt;&lt;/mspace&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;wt.% to 60&lt;span&gt;&lt;math altimg=\"eq-00006.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;mspace width=\".17em\"&gt;&lt;/mspace&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;wt.%, the peak frequency of reflection loss (RL) moves to low frequency from 17.92&lt;span&gt;&lt;math altimg=\"eq-00007.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;mspace width=\".17em\"&gt;&lt;/mspace&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;GHz to 16&lt;span&gt;&lt;math altimg=\"eq-00008.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;mspace width=\".17em\"&gt;&lt;/mspace&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;GHz. Meanwhile, the minimum reflection loss (RL&lt;span&gt;&lt;math altimg=\"eq-00009.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mstyle&gt;&lt;mtext mathvariant=\"normal\"&gt;min&lt;/mtext&gt;&lt;/mstyle&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;) also shows a downward trend, and the RL&lt;span&gt;&lt;math altimg=\"eq-00010.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;msub&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mstyle&gt;&lt;mtext mathvariant=\"normal\"&gt;min&lt;/mtext&gt;&lt;/mstyle&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt; value with a filling mass fraction of 60&lt;span&gt;&lt;math altimg=\"eq-00011.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;mspace width=\".17em\"&gt;&lt;/mspace&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;wt.% is −8.93&lt;span&gt;&lt;math altimg=\"eq-00012.gif\" display=\"inline\" overflow=\"scroll\"&gt;&lt;mspace width=\".17em\"&gt;&lt;/mspace&gt;&lt;/math&gt;&lt;/span&gt;&lt;span&gt;&lt;/span&gt;dB. It can be seen that stainless steel powder shows good micr","PeriodicalId":18978,"journal":{"name":"Nano","volume":"46 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Milling Processing, Morphology, and Optical Characterization of Powders from Natural Pigments as a Potential Sensitizing Material for Optical Sensors and Dye-Sensitized Solar Cells","authors":"José Adalberto Castillo-Robles, Eddie Nahúm Armendáriz-Mireles, Carlos Adrián Calles-Arriaga, Enrique Rocha-Rangel, Wilian Jesús Pech-Rodríguez, Ivanovich Estrada Guel, Erick Santiago Mata Herrera, José Alberto Ramírez-de-León","doi":"10.1142/s1793292024500085","DOIUrl":"https://doi.org/10.1142/s1793292024500085","url":null,"abstract":"<p>Dye-Sensitized Solar Cells (DSSC) and optical fiber-based-sensors sensitized with organic dyes play a fundamental role in modern technology, particularly in the family of photovoltaic power generation devices and measurement of chemical variables. DSSC is low-cost, highly efficient, and easy to manufacture. Therefore, they are a suitable option for many engineering applications. This paper deals with natural pigment extraction (spirulina, carrots (beta-carotene), and beetroot) at different milling and temperature conditions. Nanoparticles were fabricated using an SPEX mill and a planetary ball mill. The particle size distribution, absorbance (UV-Vis), and powder morphology were obtained using Field Emission Scanning Electron Microscopy (FESEM). Herein, the optical characterization of modified TiO₂ powder at different temperatures and milling conditions is performed. Results indicate that each natural dye is sensitive to operational temperature. In addition, the absorbance of the pigments is affected by milling conditions and particle size distribution. During SEM characterization, rounded particles were observed in the starting materials with average sizes of more than 15 microns in diameter until they were reduced to nanometer ranges close to 100 using SPEX milling. The observed absorption spectra range from 400 nm to 642 nm for spirulina. Moreover, the experimental results show that the intensity of the absorption peaks is affected by the temperature, which indicates a degradation of the dye. Therefore, different combinations of natural dyes will be feasible to improve the wide range of light absorption of the visible spectra and stability of DSSCs and optical fiber-based sensors.</p>","PeriodicalId":18978,"journal":{"name":"Nano","volume":"8 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ionic Liquids Nanoliposomes Based on Targeted and Active Permeability for Enhanced Combination Chemotherapy Efficiency","authors":"Kai Su, Peng Chen, Hao Gao, Yuan Zhai, Youbei Qiao, Chaoli Wang, Feng Yang","doi":"10.1142/s1793292023501151","DOIUrl":"https://doi.org/10.1142/s1793292023501151","url":null,"abstract":"<p>Tumor microenvironment severely restricts the delivery of chemotherapy drugs. The microenvironment responsive nanoparticles often have complex designs with hampered clinical translatability. Here, we show a kind of ionic liquids (ILs) with soybean lecithin (SL) as cation, folic acid (FA) as anion, in particular, it could formulate nanoliposome by film evaporation method to deliver cis-Diamineplatinum (II) dichloride (cisplatin, Cis) and doxorubicin hydrochloride (DOX). These special ILs liposome could target tumor cells via folate receptor-mediated endocytosis by enhancing the cellular uptake, and significantly improve the deep permeability by actively infiltrating throughout the tumor tissue owing to the special noncovalent bond between SL–FA ILs with cell membrane. Moreover, ILs liposomes improve delivery efficiency of Cis and DOX and enhance the combined chemotherapeutic effect. The simple preparation process of the ILs nanoliposome should facilitate the clinical transformation of nanodrugs.</p>","PeriodicalId":18978,"journal":{"name":"Nano","volume":"295 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2024-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140204419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Color-tunable emission of ZnO/Ag2O/MnO2 nanocomposite phosphor for solid-state lighting applications","authors":"Shafi ul Islam, Urosa Latief, Javid Ali, Mohd. Shahid Khan","doi":"10.1142/s179329202350114x","DOIUrl":"https://doi.org/10.1142/s179329202350114x","url":null,"abstract":"","PeriodicalId":18978,"journal":{"name":"Nano","volume":"78 1","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139011315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effectiveness of Graphene Nano-Ribbon Tunnel Field Effect Transistor for Bio-Molecular Identification","authors":"G. Nayana, P. Vimala","doi":"10.1142/s1793292023501138","DOIUrl":"https://doi.org/10.1142/s1793292023501138","url":null,"abstract":"","PeriodicalId":18978,"journal":{"name":"Nano","volume":"5 2","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139011548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Co@MoS2 nanocatalyst: enhanced activation of peroxymonosulfate for effective degradation of sulfadiazine","authors":"Sai Wang, En-Ni Wu, Liang Meng, Zhenjun Wang, Tuan-Tuan Wang","doi":"10.1142/s1793292023501102","DOIUrl":"https://doi.org/10.1142/s1793292023501102","url":null,"abstract":"","PeriodicalId":18978,"journal":{"name":"Nano","volume":"4 7","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139244129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Studies on the biocompatibility of carbon dots prepared utilizing aquatic waste","authors":"Yi Zhang, Ge Tian, Guosheng Luo, Ping Dong, Ruifang Hua, Fanping Wang, Yun Zhang","doi":"10.1142/s1793292023501126","DOIUrl":"https://doi.org/10.1142/s1793292023501126","url":null,"abstract":"","PeriodicalId":18978,"journal":{"name":"Nano","volume":"284 ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139242667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photoelectrochemical sensor based on MoS2/Bi2MoO6 heterojunction for triptriolide detection","authors":"Pengcheng Shuang, Yongming Luo","doi":"10.1142/s1793292023501114","DOIUrl":"https://doi.org/10.1142/s1793292023501114","url":null,"abstract":"","PeriodicalId":18978,"journal":{"name":"Nano","volume":"33 7","pages":""},"PeriodicalIF":1.2,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139244952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}