Journal of Nonlinear Optical Physics & Materials最新文献_第3页

4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-07-28 DOI: 10.1142/s0218863523990011

引用次数: 0

Applications of soft biomaterials based on organic and hybrid thin films deposited from the vapor phase 基于气相沉积的有机和杂化薄膜的软生物材料的应用

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-07-10 DOI: 10.1088/2515-7639/ace5df

Sophie Marcelja, Lisanne Demelius, T. A. Ali, Margherita Aghito, Fabian Muralter, G. H. Rodríguez, M. Kräuter, K. Unger, Lukas Wolfsberger, A. Coclite

{"title":"Applications of soft biomaterials based on organic and hybrid thin films deposited from the vapor phase","authors":"Sophie Marcelja, Lisanne Demelius, T. A. Ali, Margherita Aghito, Fabian Muralter, G. H. Rodríguez, M. Kräuter, K. Unger, Lukas Wolfsberger, A. Coclite","doi":"10.1088/2515-7639/ace5df","DOIUrl":"https://doi.org/10.1088/2515-7639/ace5df","url":null,"abstract":"Soft biomaterials are a crucial component in several application fields. They are used, for example, in biomedical implants, biosensors, drug delivery systems as well as in tissue engineering. In parallel to extensive ongoing efforts to synthesize new materials, the development of means to tailor the materials’ surface properties and thus their interaction with the environment is an important field of research. This has led to the emergence of several surface modification techniques that enable the exploitation of biomaterials in a broader range of technologies. In particular, the use of functional thin films can enable a plethora of biomedical applications by combining advantageous bulk properties of the substrate (e.g. flexibility, lightweight, structural strength) with tailored surface properties of the thin film (e.g. enhancing/prevention of cell proliferation, controlled drug release). For some biomedical applications, thin films can also be the main functional components, e.g. in biosensors. The present review focuses on recent developments in the applications of soft biomaterials based on thin films deposited from the vapor phase. In the field of soft biomaterials, the possibility of depositing from the vapor phase—without the need for any solvents—offers the unprecedented benefit that no toxic leachables are included in the biomaterial. Further, due to the complete lack of solvents and chemicals overall being used in small quantities only, depositing thin films from the vapor phase can be a more sustainable choice than other techniques that are commonly used.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"4 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87097647","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Requisites on material viscoelasticity for exceptional points in passive dynamical systems 被动动力系统中异常点的材料粘弹性要求

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-07-03 DOI: 10.1088/2515-7639/ace381

Abhishek Gupta, R. Thevamaran

{"title":"Requisites on material viscoelasticity for exceptional points in passive dynamical systems","authors":"Abhishek Gupta, R. Thevamaran","doi":"10.1088/2515-7639/ace381","DOIUrl":"https://doi.org/10.1088/2515-7639/ace381","url":null,"abstract":"Recent progress in non-Hermitian physics and the notion of exceptional point (EP) degeneracies in elastodynamics have led to the development of novel metamaterials for the control of elastic wave propagation, hypersensitive sensors, and actuators. The emergence of EPs in a parity-time symmetric system relies on judiciously engineered balanced gain and loss mechanisms. Creating gain requires complex circuits and amplification mechanisms, making engineering applications challenging. Here, we report strategies to achieve EPs in passive non-Hermitian elastodynamic systems with differential loss derived from viscoelastic materials. We compare different viscoelastic material models and show that the EP emerges only when the frequency-dependent loss-tangent of the viscoelastic material remains nearly constant in the frequency range of operation. This type of loss tangent occurs in materials that undergo stress-relaxation over a broad spectrum of relaxation times, for example, materials that follow the Kelvin–Voigt fractional derivative (KVFD) model. Using dynamic mechanical analysis, we show that a few common viscoelastic elastomers, such as polydimethylsiloxane and polyurethane rubber, follow the KVFD behavior such that the loss tangent becomes almost constant after a particular frequency. The material models we present and the demonstration of the potential of a widely available material system in creating EPs pave the way for developing non-Hermitian metamaterials with hypersensitivity to perturbations or enhanced emissivity.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"2 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74611730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Direct observation of the magnetic anisotropy of an Fe(II) spin crossover molecular thin film Fe(II)自旋交叉分子薄膜磁各向异性的直接观察

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-07-01 DOI: 10.1088/2515-7639/ace21a

Ashley S. Dale, Saeed Yazdani, T. K. Ekanayaka, Esha Mishra, Yuchen Hu, P. Dowben, J. Freeland, Jian Zhang, R. Cheng

{"title":"Direct observation of the magnetic anisotropy of an Fe(II) spin crossover molecular thin film","authors":"Ashley S. Dale, Saeed Yazdani, T. K. Ekanayaka, Esha Mishra, Yuchen Hu, P. Dowben, J. Freeland, Jian Zhang, R. Cheng","doi":"10.1088/2515-7639/ace21a","DOIUrl":"https://doi.org/10.1088/2515-7639/ace21a","url":null,"abstract":"In this work, we provide clear evidence of magnetic anisotropy in the local orbital moment of a molecular thin film based on the SCO complex [Fe(H2B(pz)2)2(bipy)] (pz = pyrazol−1−yl, bipy = 2,2′−bipyridine). Field dependent x-ray magnetic circular dichroism measurements indicate that the magnetic easy axis for the orbital moment is along the surface normal direction. Along with the presence of a critical field, our observation points to the existence of an anisotropic energy barrier in the high-spin state. The estimated nonzero coupling constant of ∼2.47 × 10−5 eV molecule−1 indicates that the observed magnetocrystalline anisotropy is mostly due to spin–orbit coupling. The spin- and orbital-component anisotropies are determined to be 30.9 and 5.04 meV molecule−1, respectively. Furthermore, the estimated g factor in the range of 2.2–2.45 is consistent with the expected values. This work has paved the way for an understanding of the spin-state-switching mechanism in the presence of magnetic perturbations.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"6 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86891539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Different healing characteristics of thiol-bearing molecules on CVD-grown MoS2 含硫醇分子对cvd生长的二硫化钼的不同愈合特性

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-07-01 DOI: 10.1088/2515-7639/acdfff

Giovanna Feraco, O. D. Luca, Ali Syari’ati, Sardar Hameed, A. A. El Yumin, Jianting Ye, R. Agostino, P. Rudolf

引用次数: 0

Incorporation of tungsten or cobalt into TaN barrier layers controls morphology of deposited copper 钨或钴掺入钽阻挡层控制了沉积铜的形态

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-06-30 DOI: 10.1088/2515-7639/acdeaa

Cara-Lena Nies, M. Nolan

{"title":"Incorporation of tungsten or cobalt into TaN barrier layers controls morphology of deposited copper","authors":"Cara-Lena Nies, M. Nolan","doi":"10.1088/2515-7639/acdeaa","DOIUrl":"https://doi.org/10.1088/2515-7639/acdeaa","url":null,"abstract":"Progress in semiconductor devices, which has enabled the information and communications technology explosion of the 21st century, has been driven by Moore’s Law and the accompanying aggressive scaling of transistors. However, it is now acknowledged that the currently used copper interconnects are becoming a bottleneck in sub-nm scaling. Semiconductor devices require a diffusion barrier and a seed layer in the volume available to the interconnect metal. This then limits the minimum size of the interconnect and copper suffers from a preference to form 3D islands which are non-conducting rather than conducting films. Therefore there is a pressing need to either replace copper, which has its own difficulties, or to reduce the volume taken up by the diffusion barrier and liner; ideally finding a single material displaying both properties is needed. We have previously shown that incorporation of Ru into the surface layer of TaN is a strong alternative to the usual TaN/Ta or TaN/Ru stacks. In this work we study other possible metals that can be incorporated into TaN, namely Co and W, which are less expensive and critical than Ru and can potentially outperform it. Our first principles density functional theory results from static relaxations and ab initio molecular dynamics show that there are several compositions of both Co- and W-doped TaN which should promote growth of 2D copper interconnects without compromising the barrier properties of TaN. With this selection of materials it should be possible to design new experimental processes that promote downscaled copper interconnects for the next generation of electronic devices. Additionally, our work presents an improved method towards prediction of thin film morphology on a given substrate, which can be of use for a variety of materials science applications.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"34 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78922365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Towards control of the chirality sign at ultrathin metal films: Bi at 2Ni/Co 超薄金属膜手性标志的控制:Bi at 2Ni/Co

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-06-26 DOI: 10.1088/2515-7639/acdf22

S. Gallego

引用次数: 0

From spectral analysis to hysteresis loops: a breakthrough in the optimization of magnetic nanomaterials for bioapplications 从光谱分析到磁滞回线:生物应用磁性纳米材料优化的突破

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-06-02 DOI: 10.1088/2515-7639/acdaf8

G. Barrera, P. Allia, P. Tiberto

{"title":"From spectral analysis to hysteresis loops: a breakthrough in the optimization of magnetic nanomaterials for bioapplications","authors":"G. Barrera, P. Allia, P. Tiberto","doi":"10.1088/2515-7639/acdaf8","DOIUrl":"https://doi.org/10.1088/2515-7639/acdaf8","url":null,"abstract":"An innovative method is proposed to determine the most important magnetic properties of bioapplication-oriented magnetic nanomaterials exploiting the connection between hysteresis loop and frequency spectrum of magnetization. Owing to conceptual and practical simplicity, the method may result in a substantial advance in the optimization of magnetic nanomaterials for use in precision medicine. The techniques of frequency analysis of the magnetization currently applied to nanomaterials both in vitro and in vivo usually give a limited, qualitative picture of the effects of the active biological environment, and have to be complemented by direct measurement of the hysteresis loop. We show that the very same techniques can be used to convey all the information needed by present-day biomedical applications without the necessity of doing conventional magnetic measurements in the same experimental conditions. The spectral harmonics obtained analysing the response of a magnetic tracer in frequency, as in magnetic particle spectroscopy/imaging, are demonstrated to lead to a precise reconstruction of the hysteresis loop, whose most important parameters (loop’s area, magnetic remanence and coercive field) are directly obtained through transformation formulas based on simple manipulation of the harmonics amplitudes and phases. The validity of the method is experimentally verified on various magnetic nanomaterials for bioapplications submitted to ac magnetic fields of different amplitude, frequency and waveform. In all cases, the experimental data taken in the frequency domain exactly reproduce the magnetic properties obtained from conventional magnetic measurements.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"16 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80633808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Halogenation effect on physicochemical properties of Ti3C2 MXenes 卤化对ti3c2mxenes理化性质的影响

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-05-25 DOI: 10.1088/2515-7639/acd8f3

Seyedeh Alieh Kazemi, Samuel Akinlolu Ogunkunle, Oscar J. Allen, W. Wen, Alan Wee-Chung Liew, Shiwei Yin, Yun Wang

{"title":"Halogenation effect on physicochemical properties of Ti3C2 MXenes","authors":"Seyedeh Alieh Kazemi, Samuel Akinlolu Ogunkunle, Oscar J. Allen, W. Wen, Alan Wee-Chung Liew, Shiwei Yin, Yun Wang","doi":"10.1088/2515-7639/acd8f3","DOIUrl":"https://doi.org/10.1088/2515-7639/acd8f3","url":null,"abstract":"Halogenated MXenes have been experimentally demonstrated to be promising two-dimensional materials for a wide range of applicability. However, their physicochemical properties are largely unknown at the atomic level. In this study, we applied density functional theory (DFT) to theoretically investigate the halogenation effects on the structural, electronic, and mechanical characteristics of Ti3C2, which is the most studied MXene material. Three atomic configurations with different adsorption sites for four kinds of halogen terminals (fluorine, chlorine, bromine, and iodine) were considered. Our DFT results reveal that the adsorption site of terminals has a considerable impact on the properties of MXene. This can be ascribed to the different coordination environments of the surface Ti atoms, which change d-orbital splitting configurations of surface Ti atoms and the stabilities of systems. According to the density of states, crystal orbital Hamilton population, and charge analyses, all the considered halogenated MXenes are metallic. The electronic and mechanical properties of the halogenated MXenes are strongly dependent on the electronegativity of the halogen terminal group. The Ti–F bond has more ionic characteristics, which causes Ti3C2F2 mechanically behave in a more ductile manner. Our DFT results, therefore, suggest that the physicochemical properties of MXenes can be tuned for practical applications by selecting specific halogen terminal groups.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"21 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91214675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Tuning the spin texture of graphene with size-specific Cu n clusters: a first-principles study 用特定尺寸的Cu n团簇调整石墨烯的自旋结构:第一性原理研究

IF 2.7 4区物理与天体物理

Journal of Nonlinear Optical Physics & Materials Pub Date : 2023-05-25 DOI: 10.1088/2515-7639/acd8f2

Ramasamy Murugesan, E. Janssens, J. van de Vondel, V. Afanas’ev, M. Houssa

{"title":"Tuning the spin texture of graphene with size-specific Cu n clusters: a first-principles study","authors":"Ramasamy Murugesan, E. Janssens, J. van de Vondel, V. Afanas’ev, M. Houssa","doi":"10.1088/2515-7639/acd8f2","DOIUrl":"https://doi.org/10.1088/2515-7639/acd8f2","url":null,"abstract":"The size dependent interaction of Cu n (n = 1‒5) clusters with pristine and defective (C-vacancy) graphene is studied by employing density functional theory. The computed binding energies are in the range of ∼0.5 eV for pristine graphene and ∼3.5 eV for defective graphene, indicating a much stronger interaction in the later system. The induced spin–orbit coupling interaction, due to the proximity of the Cu n cluster, is studied with non-collinear spin-polarized simulations. The clusters cause a spin splitting in the order of few meV. The resultant low energy bands spin textures are also computed, and a spin–valley coupling in the case of even atom clusters on pristine graphene is predicted, leading to the emergence of a spin lifetime anisotropy. For defective graphene, a complete out-of-plane spin texture and a large spin splitting of 40–100 meV is obtained for Cu n (n = 1, 2, 3, 5) clusters due to local magnetic moment. On the other hand, for Cu4/defective graphene, having no net magnetic moment, the spin–valley coupling prevails close to the band edges.","PeriodicalId":16520,"journal":{"name":"Journal of Nonlinear Optical Physics & Materials","volume":"129 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85497967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0