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Förster Resonance Energy Transfer and Enhanced Emission in Cs4PbBr6 Nanocrystals Encapsulated in Silicon Nano-Sheets for Perovskite Light Emitting Diode Applications. 封装在硅纳米片中的 Cs4PbBr6 纳米晶体的佛斯特共振能量转移和增强发射,用于 Perovskite 发光二极管。
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-03 DOI: 10.3390/nano14191596
Araceli Herrera Mondragon, Roberto Gonzalez Rodriguez, Noah Hurley, Sinto Varghese, Yan Jiang, Brian Squires, Maoding Cheng, Brooke Davis, Qinglong Jiang, Mansour Mortazavi, Anupama B Kaul, Jeffery L Coffer, Jingbiao Cui, Yuankun Lin
{"title":"Förster Resonance Energy Transfer and Enhanced Emission in Cs<sub>4</sub>PbBr<sub>6</sub> Nanocrystals Encapsulated in Silicon Nano-Sheets for Perovskite Light Emitting Diode Applications.","authors":"Araceli Herrera Mondragon, Roberto Gonzalez Rodriguez, Noah Hurley, Sinto Varghese, Yan Jiang, Brian Squires, Maoding Cheng, Brooke Davis, Qinglong Jiang, Mansour Mortazavi, Anupama B Kaul, Jeffery L Coffer, Jingbiao Cui, Yuankun Lin","doi":"10.3390/nano14191596","DOIUrl":"https://doi.org/10.3390/nano14191596","url":null,"abstract":"<p><p>Encapsulating Cs<sub>4</sub>PbBr<sub>6</sub> quantum dots in silicon nano-sheets not only stabilizes the halide perovskite, but also takes advantage of the nano-sheet for a compatible integration with the traditional silicon semiconductor. Here, we report the preparation of un-passivated Cs<sub>4</sub>PbBr<sub>6</sub> ellipsoidal nanocrystals and pseudo-spherical quantum dots in silicon nano-sheets and their enhanced photoluminescence (PL). For a sample with low concentrations of quantum dots in silicon nano-sheets, the emission from Cs<sub>4</sub>PbBr<sub>6</sub> pseudo-spherical quantum dots is quenched and is dominated with Pb<sup>2+</sup> ion/silicene emission, which is very stable during the whole measurement period. For a high concentration of Cs<sub>4</sub>PbBr<sub>6</sub> ellipsoidal nanocrystals in silicon nano-sheets, we have observed Förster resonance energy transfer with up to 87% efficiency through the oscillation of two PL peaks when UV excitation switches between on and off, using recorded video and PL lifetime measurements. In an area of a non-uniform sample containing both ellipsoidal nanocrystals and pseudo-spherical quantum dots, where Pb<sup>2+</sup> ion/silicene emissions, broadband emissions from quantum dots, and bandgap edge emissions (515 nm) appear, the 515 nm peak intensity increases five times over 30 min of UV excitation, probably due to a photon recycling effect. This irradiated sample has been stable for one year of ambient storage. Cs<sub>4</sub>PbBr<sub>6</sub> quantum dots encapsulated in silicon nano-sheets can lead to applications of halide perovskite light emitting diodes (PeLEDs) and integration with traditional semiconductor materials.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11478374/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Metal-Cation-Induced Tiny Ripple on Graphene. 金属阳离子在石墨烯上引发的微小波纹
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-02 DOI: 10.3390/nano14191593
Yingying Huang, Hanlin Li, Liuyuan Zhu, Yongshun Song, Haiping Fang
{"title":"Metal-Cation-Induced Tiny Ripple on Graphene.","authors":"Yingying Huang, Hanlin Li, Liuyuan Zhu, Yongshun Song, Haiping Fang","doi":"10.3390/nano14191593","DOIUrl":"https://doi.org/10.3390/nano14191593","url":null,"abstract":"<p><p>Ripples on graphene play a crucial role in manipulating its physical and chemical properties. However, producing ripples, especially at the nanoscale, remains challenging with current experimental methods. In this study, we report that tiny ripples in graphene can be generated by the adsorption of a single metal cation (Na<sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup>, Cu<sup>2+</sup>, Fe<sup>3+</sup>) onto a graphene sheet, based on the density functional theory calculations. We attribute this to the cation-π interaction between the metal cation and the aromatic rings on the graphene surface, which makes the carbon atoms closer to metal ions, causing deformation of the graphene sheet, especially in the out-of-plane direction, thereby creating ripples. The equivalent pressures applied to graphene sheets in out-of-plane direction, generated by metal cation-π interactions, reach magnitudes on the order of gigapascals (GPa). More importantly, the electronic and mechanical properties of graphene sheets are modified by the adsorption of various metal cations, resulting in opened bandgaps and enhanced rigidity characterized by a higher elastic modulus. These findings show great potential for applications for producing ripples at the nanoscale in graphene through the regulation of metal cation adsorption.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11477897/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetization States and Coupled Spin-Wave Modes in Concentric Double Nanorings. 同心双纳米环中的磁化态和耦合自旋波模式
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-02 DOI: 10.3390/nano14191594
Bushra Hussain, Michael G Cottam
{"title":"Magnetization States and Coupled Spin-Wave Modes in Concentric Double Nanorings.","authors":"Bushra Hussain, Michael G Cottam","doi":"10.3390/nano14191594","DOIUrl":"https://doi.org/10.3390/nano14191594","url":null,"abstract":"<p><p>Concentric multiple nanorings have previously been fabricated and investigated mainly for their different static magnetization states. Here, we present a theoretical analysis for the magnetization dynamics in double nanorings arranged concentrically, where there is coupling across a nonmagnetic spacer due to the long-range dipole-dipole interactions. We employ a microscopic, or Hamiltonian-based, formalism to study the discrete spin waves that exist in the magnetic states where the individual rings may be in either a vortex or an onion state. Numerical results are shown for the frequencies and the spatial amplitudes (with relative phase included) of the spin-wave modes. Cases are considered in which the magnetic materials of the rings are the same (taken to be permalloy) or two different materials such as permalloy and cobalt. The dependence of these properties on the mean radial position of the spacer were studied, showing, in most cases, the existence of two distinct transition fields. The special cases, where the radial spacer width becomes very small (less than 1 nm) were analyzed to study direct interfaces between dissimilar materials and/or effects of interfacial exchange interactions such as Ruderman-Kittel-Kasuya-Yoshida coupling. These spin-wave properties may be of importance for magnetic switching devices and sensors.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11478674/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Electrochemical Detection of H2O2 Using Bi2O3/Bi2O2Se Nanocomposites. 使用 Bi2O3/Bi2O2Se 纳米复合材料进行 H2O2 电化学检测。
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-02 DOI: 10.3390/nano14191592
Pooja D Walimbe, Rajeev Kumar, Amit Kumar Shringi, Obed Keelson, Hazel Achieng Ouma, Fei Yan
{"title":"Electrochemical Detection of H<sub>2</sub>O<sub>2</sub> Using Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>O<sub>2</sub>Se Nanocomposites.","authors":"Pooja D Walimbe, Rajeev Kumar, Amit Kumar Shringi, Obed Keelson, Hazel Achieng Ouma, Fei Yan","doi":"10.3390/nano14191592","DOIUrl":"https://doi.org/10.3390/nano14191592","url":null,"abstract":"<p><p>The development of high-performance hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) sensors is critical for various applications, including environmental monitoring, industrial processes, and biomedical diagnostics. This study explores the development of efficient and selective H<sub>2</sub>O<sub>2</sub> sensors based on bismuth oxide/bismuth oxyselenide (Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>O<sub>2</sub>Se) nanocomposites. The Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>O<sub>2</sub>Se nanocomposites were synthesized using a simple solution-processing method at room temperature, resulting in a unique heterostructure with remarkable electrochemical characteristics for H<sub>2</sub>O<sub>2</sub> detection. Characterization techniques, including powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM), confirmed the successful formation of the nanocomposites and their structural integrity. The synthesis time was varied to obtain the composites with different Se contents. The end goal was to obtain phase pure Bi<sub>2</sub>O<sub>2</sub>Se. Electrochemical measurements revealed that the Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>O<sub>2</sub>Se composite formed under optimal synthesis conditions displayed high sensitivity (75.7 µA µM<sup>-1</sup> cm<sup>-2</sup>) and excellent selectivity towards H<sub>2</sub>O<sub>2</sub> detection, along with a wide linear detection range (0-15 µM). The superior performance is attributed to the synergistic effect between Bi<sub>2</sub>O<sub>3</sub> and Bi<sub>2</sub>O<sub>2</sub>Se, enhancing electron transfer and creating more active sites for H<sub>2</sub>O<sub>2</sub> oxidation. These findings suggest that Bi<sub>2</sub>O<sub>3</sub>/Bi<sub>2</sub>O<sub>2</sub>Se nanocomposites hold great potential as advanced H<sub>2</sub>O<sub>2</sub> sensors for practical applications.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11478603/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synergic Effect of N and Se Facilitates Photoelectric Performance in Co-Hyperdoped Silicon. 氮和硒的协同效应促进共掺杂硅的光电性能
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-02 DOI: 10.3390/nano14191591
Haibin Sun, Xiaolong Liu, Caixia Xu, Long Xu, Yuwei Chen, Haima Yang, Xing Yang, Peng Rao, Shengli Sun, Li Zhao
{"title":"Synergic Effect of N and Se Facilitates Photoelectric Performance in Co-Hyperdoped Silicon.","authors":"Haibin Sun, Xiaolong Liu, Caixia Xu, Long Xu, Yuwei Chen, Haima Yang, Xing Yang, Peng Rao, Shengli Sun, Li Zhao","doi":"10.3390/nano14191591","DOIUrl":"https://doi.org/10.3390/nano14191591","url":null,"abstract":"<p><p>Femtosecond-laser-fabricated black silicon has been widely used in the fields of solar cells, photodetectors, semiconductor devices, optical coatings, and quantum computing. However, the responsive spectral range limits its application in the near- to mid-infrared wavelengths. To further increase the optical responsivity in longer wavelengths, in this work, silicon (Si) was co-hyperdoped with nitrogen (N) and selenium (Se) through the deposition of Se films on Si followed by femtosecond (fs)-laser irradiation in an atmosphere of NF<sub>3</sub>. The optical and crystalline properties of the Si:N/Se were found to be influenced by the precursor Se film and laser fluence. The resulting photodetector, a product of this innovative approach, exhibited an impressive responsivity of 24.8 A/W at 840 nm and 19.8 A/W at 1060 nm, surpassing photodetectors made from Si:N, Si:S, and Si:S/Se (the latter two fabricated in SF6). These findings underscore the co-hyperdoping method's potential in significantly improving optoelectronic device performance.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11478113/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142485789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Efficient Formaldehyde Gas Sensing Performance via Promotion of Oxygen Vacancy on In-Doped LaFeO3 Nanofibers. 通过促进掺杂 LaFeO3 纳米纤维上的氧空位实现高效甲醛气体传感性能
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-02 DOI: 10.3390/nano14191595
Lei Zhu, Jiaxin Zhang, Jianan Wang, Jianwei Liu, Wei Zhao, Wei Yan
{"title":"Efficient Formaldehyde Gas Sensing Performance via Promotion of Oxygen Vacancy on In-Doped LaFeO<sub>3</sub> Nanofibers.","authors":"Lei Zhu, Jiaxin Zhang, Jianan Wang, Jianwei Liu, Wei Zhao, Wei Yan","doi":"10.3390/nano14191595","DOIUrl":"https://doi.org/10.3390/nano14191595","url":null,"abstract":"<p><p>Perovskite oxide LaFeO<sub>3</sub>(LFO) emerges as a potential candidate for formaldehyde (HCHO) detection due to its exceptional electrical conductivity and abundant active metal sites. However, the sensitivity of the LFO sensor needs to be further enhanced. Herein, a series of La<sub>x</sub>In<sub>1-x</sub>FeO<sub>3</sub> (x = 1.0, 0.9, 0.8, and 0.7) nanofibers (L<sub>x</sub>In<sub>1-x</sub>FO NFs) with different ratios of La/In were obtained via the electrospinning method followed by a calcination process. Among all these L<sub>x</sub>In<sub>1-x</sub>FO NFs sensors, the sensor based on the L<sub>0.8</sub>In<sub>0.2</sub>FO NFs possessed the maximum response value of 18.8 to 100 ppm HCHO at the operating temperature of 180 °C, which was 4.47 times higher than that based on pristine LFO NFs (4.2). Furthermore, the L<sub>0.8</sub>In<sub>0.2</sub>FO NFs sensor also exhibited a rapid response/recovery time (2 s/22 s), exceptional repeatability, and long-term stability. This excellent gas sensing performance of the L<sub>0.8</sub>In<sub>0.2</sub>FO NFs can be attributed to the large number of oxygen vacancies induced by the replacement of the A-site La<sup>3+</sup> by In<sup>3+</sup>, the large specific surface area, and the porous structure. This research presents an approach to enhance the HCHO gas sensing capabilities by adjusting the introduced oxygen vacancies through the doping of A-sites in perovskite oxides.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11478380/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Renewable Resources as Promising Materials for Obtaining Graphene Oxide-like Structures. 可再生资源是获得类石墨烯结构的理想材料。
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-01 DOI: 10.3390/nano14191588
Tilek Kuanyshbekov, Kydyrmolla Akatan, Nazim Guseinov, Renata Nemkaeva, Bayan Kurbanova, Zhandos Tolepov, Malika Tulegenova, Sana Kabdrakhmanova, Almira Zhilkashinova
{"title":"Renewable Resources as Promising Materials for Obtaining Graphene Oxide-like Structures.","authors":"Tilek Kuanyshbekov, Kydyrmolla Akatan, Nazim Guseinov, Renata Nemkaeva, Bayan Kurbanova, Zhandos Tolepov, Malika Tulegenova, Sana Kabdrakhmanova, Almira Zhilkashinova","doi":"10.3390/nano14191588","DOIUrl":"https://doi.org/10.3390/nano14191588","url":null,"abstract":"<p><p>Currently, one of the topical directions in the field of production and application of graphene-like nanostructures is the use of renewable natural raw materials, which have unlimited resources for an economically efficient large-scale yield of a product with environmental safety. In this regard, we present the production of graphene oxide (GO) from a renewable natural raw material of plant biomass, birch activated carbon (BAC), and a comparison of the obtained physicochemical, mechanical, and electrical properties of birch activated carbon-graphene oxide (BAC-GO) and graphite-graphene oxide (G-GO) synthesized from the initial materials, BAC and graphite (G). Results obtained from this study confirm the successful oxidation of BAC, which correlates well with the physical-chemical dates of the G-GO and BAC-GO samples. Change in data after the oxidation of graphite and BAC was facilitated by the structure of the starting materials and, presumably, the location and content of functional oxygen-containing groups in the G-GO and BAC-GO chains. Based on the results, the application of a cost-effective, eco-friendly colloidal solution of nanodispersed BAC-GO from a plant biomass-based high-quality resource for producing large-scale nanostructured graphene is validated which has potential applicability in nanoelectronics, medicine, and other fields.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11478307/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Features of High-Precision Photothermal Analysis of Liquid Systems by Dual-Beam Thermal Lens Spectrometry. 利用双光束热透镜光谱仪对液体系统进行高精度光热分析的特点。
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-01 DOI: 10.3390/nano14191586
Vladislav R Khabibullin, Ivan V Mikheev, Mikhail A Proskurnin
{"title":"Features of High-Precision Photothermal Analysis of Liquid Systems by Dual-Beam Thermal Lens Spectrometry.","authors":"Vladislav R Khabibullin, Ivan V Mikheev, Mikhail A Proskurnin","doi":"10.3390/nano14191586","DOIUrl":"https://doi.org/10.3390/nano14191586","url":null,"abstract":"<p><p>Thermal lens spectrometry is a high-sensitivity method for measuring the optical and thermal parameters of samples of different nature. To obtain both thermal diffusivity and absorbance-based signal measurements with high accuracy and precision, it is necessary to pay attention to the factors that influence the trueness of photothermal measurements. In this study, the features of liquid objects are studied, and the influence of optical and thermal effects accompanying photothermal phenomena are investigated. Thermal lens analysis of dispersed solutions and systems with photoinduced activity is associated with a large number of side effects, the impact of which on trueness is not always possible to determine. It is necessary to take into account the physicochemical properties and optical and morphological features of the nanophase and components exhibiting photoinduced activity. The results obtained make it possible to reduce systematic and random errors in determining the thermal-diffusivity-based and absorbance-based photothermal signals for liquid objects, and also contribute to a deeper understanding of the physicochemical processes in the sample.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11478039/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470380","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermo- and Photoresponsive Smart Nanomaterial Based on Poly(diethyl vinyl phosphonate)-Capped Gold Nanoparticles. 基于聚(乙烯基膦酸二乙酯)封端金纳米粒子的热致和光致智能纳米材料。
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-01 DOI: 10.3390/nano14191589
Antonio Buonerba, Rosita Lapenta, Francesco Della Monica, Roberto Piacentini, Lucia Baldino, Maria Rosa Scognamiglio, Vito Speranza, Stefano Milione, Carmine Capacchione, Bernhard Rieger, Alfonso Grassi
{"title":"Thermo- and Photoresponsive Smart Nanomaterial Based on Poly(diethyl vinyl phosphonate)-Capped Gold Nanoparticles.","authors":"Antonio Buonerba, Rosita Lapenta, Francesco Della Monica, Roberto Piacentini, Lucia Baldino, Maria Rosa Scognamiglio, Vito Speranza, Stefano Milione, Carmine Capacchione, Bernhard Rieger, Alfonso Grassi","doi":"10.3390/nano14191589","DOIUrl":"https://doi.org/10.3390/nano14191589","url":null,"abstract":"<p><p>A new nanodevice based on gold nanoparticles (AuNPs) capped with poly(diethylvinylphosphonate) (PDEVP) has been synthesized, showing interesting photophysical and thermoresponsive properties. The synthesis involves a properly designed Yttriocene catalyst coordinating the vinyl-lutidine (VL) initiator active in diethyl vinyl phosphonate polymerization. The unsaturated PDEVP chain ending was thioacetylated, deacetylated, and reacted with tetrachloroauric acid and sodium borohydride to form PDEVP-VL-capped AuNPs. The NMR, UV-Vis, and ESI-MS characterization of the metal nanoparticles confirmed the formation of the synthetic intermediates and the expected colloidal systems. AuNPs of subnanometric size were determined by WAXD and UV-Vis analysis. UV-Vis and fluorescence analysis confirmed the effective anchoring of the thiolated PDEVP to AuNPs. The formation of 50-200 nm globular structures was assessed by SEM and AFM microscopy in solid state and confirmed by DLS in aqueous dispersion. Hydrodynamic radius studies showed colloidal contraction with temperature, demonstrating thermoresponsive behavior. These properties suggest potential biomedical applications for the photoablation of malignant cells or controlled drug delivery induced by light or heat for the novel PDEVP-capped AuNP systems.</p>","PeriodicalId":18966,"journal":{"name":"Nanomaterials","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11478069/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142470431","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mixed Systems of Quaternary Ammonium Foam Drainage Agent with Carbon Quantum Dots and Silica Nanoparticles for Improved Gas Field Performance. 季铵泡沫排水剂与碳量子点和二氧化硅纳米颗粒的混合体系,用于改善气田性能。
IF 4.4 3区 材料科学
Nanomaterials Pub Date : 2024-10-01 DOI: 10.3390/nano14191590
Yongqiang Sun, Yongping Zhang, Anqi Wei, Xin Shan, Qingwang Liu, Zhenzhong Fan, Ao Sun, Lin Zhu, Lingjin Kong
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