Synthetic Metals最新文献_第10页

Interfacial effects of gold on PEDOT nanotubes modified electrodes employed for the adsorption of micropollutants 金对用于吸附微污染物的 PEDOT 纳米管改性电极的界面效应

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-20 DOI: 10.1016/j.synthmet.2024.117755

Ana L. Soares , Thiago N.M. Cervantes , Diogo S. Pellosi , Luís F. Marchesi , Frederico L.F. Soares , Marcio Vidotti

{"title":"Interfacial effects of gold on PEDOT nanotubes modified electrodes employed for the adsorption of micropollutants","authors":"Ana L. Soares , Thiago N.M. Cervantes , Diogo S. Pellosi , Luís F. Marchesi , Frederico L.F. Soares , Marcio Vidotti","doi":"10.1016/j.synthmet.2024.117755","DOIUrl":"10.1016/j.synthmet.2024.117755","url":null,"abstract":"<div><div>In this work poly(3,4-ethylenedioxythiophene) nanotubes (PEDOT-NTs) containing gold nanoparticles (AuNPs) were electrochemically synthesized and characterized in detail by using in situ Raman spectroelectrochemistry. Combining conducting polymers and metallic nanoparticles (AuNPs) enhanced conductivity and superficial area of PEDOT-NTs, key factors for electrochemical sensors. In order, to better understand the modified electrodes behavior, two different micropollutants, butylparaben and triclosan, were added onto the electrode surface and the spectroelectrochemical characterization was done. The Raman imaging showed that micropollutants adsorption increases the presence of partially oxidized segments in PEDOT nanotubes, showing that PEDOT-NTs/AuNPs modified electrodes has sensitivity to micropollutants presence. In this regard the electrochemical impedance spectroscopy characterization was performed and agrees with the spectroelectrochemical characterization results, in which the charge-transfer resistance increase proportionally with the micropollutants concentration. Therefore, the present work shows the potentiality of combining the unique characteristics of the PEDOT nanotubes decorated with AuNPs nanoparticles to develop devices for detection of organic molecules of environmental interest.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"309 ","pages":"Article 117755"},"PeriodicalIF":4.0,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Enhancement of organic field-effect transistor performance via precision molecular alignment of a P4T2F-HD-based conjugated polymer 通过 P4T2F-HD 型共轭聚合物的精密分子配位提高有机场效应晶体管的性能

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-18 DOI: 10.1016/j.synthmet.2024.117754

Radhe Shyam , Takaaki Manaka , Rajiv Prakash

{"title":"Enhancement of organic field-effect transistor performance via precision molecular alignment of a P4T2F-HD-based conjugated polymer","authors":"Radhe Shyam , Takaaki Manaka , Rajiv Prakash","doi":"10.1016/j.synthmet.2024.117754","DOIUrl":"10.1016/j.synthmet.2024.117754","url":null,"abstract":"<div><div>This study conducts a detailed exploration of how the orientation of molecules affects the efficiency of organic field-effect transistors (OFETs), with a particular focus on a new conjugated polymer, P4T2F-HD. The study examines the fabrication of both large-scale, anisotropically oriented thin films and non-oriented, isotropic thin films of P4T2F-HD through two separate approaches: the Unidirectional Film Transfer Method (UFTM) for oriented films and spin-coating for isotropic films. Results indicate that UFTM notably excels in directing the molecular alignment of P4T2F-HD across extensive areas, thereby creating anisotropic thin films, whereas spin-coating yields isotropic thin films lacking specific orientation. Further investigation into the properties of these films through various analytical techniques sheds light on the role of molecular orientation in influencing their electronic characteristics. OFETs fabricated with anisotropically oriented P4T2F-HD films exhibit markedly improved performance, characterized by higher charge carrier mobility and enhanced electrical stability, in comparison to their isotropic counterparts. The study evidences that the directional arrangement of macromolecules plays a pivotal role in OFETs functionality, with UFTM-derived films demonstrating a significant leap in field-effect mobility—showing an over 100-fold improvement over spin-coated films. This boost is linked to the effective charge transmission along the polymer chains, enabled by precise molecular alignment.</div></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"309 ","pages":"Article 117754"},"PeriodicalIF":4.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142315823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Graphene quantum dots with covalently bonded gold nanoparticles winning the battle against methicillin-resistant Staphylococcus aureus under blue light 带有共价键金纳米粒子的石墨烯量子点在蓝光下战胜耐甲氧西林金黄色葡萄球菌

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-17 DOI: 10.1016/j.synthmet.2024.117753

Sladjana Dorontic , Svetlana Jovanovic , Andjela Stefanovic , Dejan Kepic , Michelangelo Scopelliti , Gabriele Ciasca , Riccardo Di Santo , Danica Bajuk Bogdanovic , Olivera Markovic , Biljana Todorovic Markovic , Zoran Markovic

{"title":"Graphene quantum dots with covalently bonded gold nanoparticles winning the battle against methicillin-resistant Staphylococcus aureus under blue light","authors":"Sladjana Dorontic , Svetlana Jovanovic , Andjela Stefanovic , Dejan Kepic , Michelangelo Scopelliti , Gabriele Ciasca , Riccardo Di Santo , Danica Bajuk Bogdanovic , Olivera Markovic , Biljana Todorovic Markovic , Zoran Markovic","doi":"10.1016/j.synthmet.2024.117753","DOIUrl":"10.1016/j.synthmet.2024.117753","url":null,"abstract":"<div><p>Over the last decades, bacterial resistance has become one of the emerging health threats. Particularly dangerous are bacterial strains resistant to various antibacterial drugs. Herein, we modified graphene quantum dots (GQDs) to produce efficient photo-induced antibacterial agents. GQDs were modified with (a) ethylene-diamine (EDA), (b) with EDA and gold nanoparticles (AuNPs), and (c) 3-amino-1,2,4-triazole (TA) using carbodiimide coupling. Photo-induced antibacterial activity of modified GQDs was tested against 8 bacterial strains. Treatment with modified GQDs and blue light (wavelength of 470 nm) resulted in remarkable antibacterial activity with minimal inhibitory concentrations (MIC) of 7.81 µg mL<sup>−1</sup> for <em>K. pneumoniae</em> and <em>S. aureus</em> and 3.9 µg mL<sup>−1</sup> against MRSA and <em>E. faecalis</em>. Planar organization of GQDs functionalized with AuNPs allowed direct access of molecular oxygen to AuNPs leading to more efficient <sup>1</sup>O<sub>2</sub> production as well as the <sup>1</sup>O<sub>2</sub> production from excited GQDs. Thus, GQDs functionalized with AuNPs showed outstanding efficiency in the battle against several bacterial strains, particularly those that lead to nosocomial infections.</p></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"309 ","pages":"Article 117753"},"PeriodicalIF":4.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Nanostructured electrochemical platform for sensitive detection of melatonin in human serum and tablets 用于灵敏检测人血清和药片中褪黑素的纳米结构电化学平台

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-16 DOI: 10.1016/j.synthmet.2024.117750

Khadija Bahend , Nurgul K. Bakirhan , Mina El Fazdoune , Abdallah El-Asri , El Arbi Bazzaoui , Mohammed Bazzaoui

{"title":"Nanostructured electrochemical platform for sensitive detection of melatonin in human serum and tablets","authors":"Khadija Bahend , Nurgul K. Bakirhan , Mina El Fazdoune , Abdallah El-Asri , El Arbi Bazzaoui , Mohammed Bazzaoui","doi":"10.1016/j.synthmet.2024.117750","DOIUrl":"10.1016/j.synthmet.2024.117750","url":null,"abstract":"<div><p>Melatonin (MT) is a crucial hormone for biological rhythms that influences sleep-wake cycles. The therapeutic value of MT in neurological disorders highlights the need for precise detection. However, challenges like low concentrations in biological samples and complex matrix interferences persist, necessitating rapid and precise analytical techniques. This study presents the novelty of designing a novel sensor that combines a molecularly imprinted polymer with polytoluidine blue O (PTBO) and multi-walled carbon nanotubes on a glassy carbon electrode for MT detection and the study of the interaction between MT and the proposed sensor using density functional theory (DFT). DFT showed that MT has a high nucleophilic character and low electrophilicity compared to TBO, which is a strong electrophile. This supports electron transfer from MT to TBO/PTBO, as indicated by the electronic chemical potentials and molecular electrostatic potentials. Scanning electron microscopy was used to see the morphology. Electrochemical measurements using differential pulse voltammetry demonstrated enhanced sensitivity and selectivity. Under optimized conditions, the sensor exhibited a linear response ranging from 1 to 1000 µM with a limit of detection and limit of quantification of 0.027 µM and 0.092 µM respectively. The performance of the sensor was evaluated in pharmaceutical tablets and human serum. Validation experiments confirmed the reliability of the sensor, with recovery rates of 97.5 % for serum and 98.0 % for pharmaceutical tablets, alongside low relative standard deviations indicating good precision. Interference studies showed minimal effects from coexisting substances, highlighting the selectivity of the proposed sensor. Comparative analysis with existing sensors showed superior performance.</p></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"309 ","pages":"Article 117750"},"PeriodicalIF":4.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142241072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Thiophene appended schiff base probe for selective ‘turn-on’ response for copper (ii) ion and their applications in live cell imaging Thiophene appended schiff base probe for selective ‘turn-on’ response for copper (ii) ion and their applications in live cell imaging 用于铜（ii）离子选择性 "开启 "响应的噻吩添加的雪夫碱探针及其在活细胞成像中的应用用于铜（ii）离子选择性 "开启 "响应的噻吩添加的雪夫碱探针及其在活细胞成像中的应用

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-13 DOI: 10.1016/j.synthmet.2024.117752

Preethi Dhanapal, Manju S.L.

引用次数: 0

Influence of nitrogen exchange in the core-shell structure of naphthalenediimide molecules on the advancement of quantum electronic properties 萘二亚胺分子核壳结构中的氮交换对量子电子特性进步的影响

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-12 DOI: 10.1016/j.synthmet.2024.117748

Hamid Hadi , Ahmed Mahmoud Ahmed Mahmoud , Imen Cherif , Reza Safari , Bouzid Gassoumi , Balkis Abdelaziz , A Aathif Basha , Predhanekar Mohamed Imran , Muhammad Usman Khan , Hasan Zandi , Mounira Mahdouani , Sahbi Ayachi , Rafik Ben Chaabane , Mahmoud M. Hessien

{"title":"Influence of nitrogen exchange in the core-shell structure of naphthalenediimide molecules on the advancement of quantum electronic properties","authors":"Hamid Hadi , Ahmed Mahmoud Ahmed Mahmoud , Imen Cherif , Reza Safari , Bouzid Gassoumi , Balkis Abdelaziz , A Aathif Basha , Predhanekar Mohamed Imran , Muhammad Usman Khan , Hasan Zandi , Mounira Mahdouani , Sahbi Ayachi , Rafik Ben Chaabane , Mahmoud M. Hessien","doi":"10.1016/j.synthmet.2024.117748","DOIUrl":"10.1016/j.synthmet.2024.117748","url":null,"abstract":"<div><p>This study explores how nitrogen substitution and gold electrodes collectively influence the electronic characteristics of naphthalenediimide (NDI) molecules (M = 1, 2, and 3) through theoretical analysis. Utilizing ELF, LOL, QTAIM, and NCI analyses, we reveal significant alterations in NDI's electronic structure and interactions upon bonding with gold electrodes (Au-M-Au). Both ELF and LOL analyses demonstrate increased electron localization and delocalization on the NDI surface due to gold electrodes, with a stronger effect on nitrogen-doped molecules (M = 2, 3). QTAIM analysis confirms favorable non-covalent interactions, including evident hydrogen bonding, between NDI molecules and gold electrodes, notably intensified in doped molecules, especially the Au…O interaction. NCI analysis provides insight into the diverse interactions within the molecular system. Overall, this research highlights the crucial role of gold electrodes and nitrogen substitution in fine-tuning NDI molecules' electronic properties. The observed modulation of electron behavior and formation of beneficial interactions with gold electrodes hint at promising applications for doped NDI-gold systems requiring efficient charge transport mechanisms.</p></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"309 ","pages":"Article 117748"},"PeriodicalIF":4.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142230184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Enhancing device characteristics of InP quantum dot LED through structural modification with polyethylene glycol blend 通过聚乙二醇混合物的结构改性提高 InP 量子点 LED 的器件特性

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-12 DOI: 10.1016/j.synthmet.2024.117747

Jaeseung Kim , Ji Ho Roh , Thi Na Le , Min Woo Hyeon , Bong Hoon Cha , Min Chul Suh , Hyunjung Kim

引用次数: 0

AC-driven QLED based on far-field effect of Au NPs 基于金氧化物远场效应的交流驱动 QLED

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-11 DOI: 10.1016/j.synthmet.2024.117749

Yanyue Yao, Zebang Zhao, Xiaojie Gong, Dandan Song, Bo Qiao, Zheng Xu, Suling Zhao

引用次数: 0

Thieno[3,2-b]thiophene flanked para-azaquinodimethane π-extended aromatic-quinoidal polymers 噻吩并[3,2-b]噻吩侧面对位氮杂喹啉二甲烷π-扩展芳香醌聚合物

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-10 DOI: 10.1016/j.synthmet.2024.117751

Bharath Dyaga , Witold Waliszewski , Zhitian Ling , Sasikumar Mayarambakam , Olivier Boyron , Wojciech Pisula , Bruno Schmaltz

{"title":"Thieno[3,2-b]thiophene flanked para-azaquinodimethane π-extended aromatic-quinoidal polymers","authors":"Bharath Dyaga , Witold Waliszewski , Zhitian Ling , Sasikumar Mayarambakam , Olivier Boyron , Wojciech Pisula , Bruno Schmaltz","doi":"10.1016/j.synthmet.2024.117751","DOIUrl":"10.1016/j.synthmet.2024.117751","url":null,"abstract":"<div><p>A series of thieno[3,2-<em>b</em>]thiophene (TT) flanked <em>para</em>-azaquinodimethane (<em>p</em>-AQM) based quinoidal conjugated polymers <strong>PAQM2TT-T</strong>, <strong>PAQM2TT-BT</strong> and <strong>PAQM3TT</strong> were designed in a strategy to extend the aromatic-quinoidal π-system. The three polymers were synthesized by Stille polycondensation, and their opto-electronic properties and device performance in field-effect transistors have been explored. From absorption spectroscopy, the polymers show low bandgaps (1.54–1.57 eV) and high HOMO energy levels. They exhibit typical p-type behavior according to the results of the characterization of the field-effect transistors with average charge carrier mobilities of 0.08 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup> for <strong>PAQM2TT-T</strong>, 0.12 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup> for <strong>PAQM2TT-BT</strong> and 0.05 cm<sup>2</sup> V<sup>−1</sup> s<sup>−1</sup> for <strong>PAM3TT</strong>. This report presents an alternative π-extended quinoidal-donor strategy to control the molecular design and properties of new <em>p</em>-AQM-based conjugated polymers.</p></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"309 ","pages":"Article 117751"},"PeriodicalIF":4.0,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142271823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Preparation and infrared shielding of polyaniline@MWCNTs flexible electrochromic device based on cotton fabric 基于棉织物的聚苯胺@MWCNTs 柔性电致变色装置的制备与红外屏蔽

IF 4 3区材料科学

Synthetic Metals Pub Date : 2024-09-07 DOI: 10.1016/j.synthmet.2024.117744

Mengjie Li, Wei Jiang, Yun Lin, Changhui Li, Xue Liu, Qiongzhen Liu, Wenwen Wang, Liyan Yang, Yuedan Wang, Dong Wang

{"title":"Preparation and infrared shielding of polyaniline@MWCNTs flexible electrochromic device based on cotton fabric","authors":"Mengjie Li, Wei Jiang, Yun Lin, Changhui Li, Xue Liu, Qiongzhen Liu, Wenwen Wang, Liyan Yang, Yuedan Wang, Dong Wang","doi":"10.1016/j.synthmet.2024.117744","DOIUrl":"10.1016/j.synthmet.2024.117744","url":null,"abstract":"<div><p>Electrochromic fabric was formed by interfacial polymerization of polyaniline (PANI) and multi-walled carbon nanotubes (MWCNTs) on the surface of cotton cloth. The morphology and properties of the composite films were controlled by changing the content of multi-walled carbon nanotubes. The electrochromic properties of the fabric and its application in the field of near-infrared thermal shielding were studied. It is found that the electrochromic fabrics with MWCNTs have better electrochemical and color-changing properties. Electrochromic fabrics achieve color changes from light yellow to yellow-green to dark green in the voltage range of −1.0–1.2 V, and maintain a fast color switching time (2.15 s for coloring, 1.89 s for bleaching) after 600 cycles. The reflection contrast (ΔR) at 500 nm is 23.01 %. Moreover, the electrochromic devices are assembled with fabrics. The device has obvious discoloration and good bending stability. In addition, the thermal shielding is realized by using their reflection characteristics in the visual-near-infrared region. The results show that the electrochromic device has a low surface temperature at different environmental condition, and the thermal reduction from the original state to the bleached state is up to 3.8 ° C, indicating the potential application of the device in thermal regulation.</p></div>","PeriodicalId":22245,"journal":{"name":"Synthetic Metals","volume":"309 ","pages":"Article 117744"},"PeriodicalIF":4.0,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0