SPIE Micro + Nano Materials, Devices, and Applications最新文献_第3页

Bio-functionalisation of polyether ether ketone using plasma immersion ion implantation 等离子体浸没离子注入聚醚醚酮生物功能化研究

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202506

E. Wakelin, Giselle C. Yeo, A. Kondyurin, Michael J. Davies, D. Mckenzie, A. Weiss, M. Bilek

{"title":"Bio-functionalisation of polyether ether ketone using plasma immersion ion implantation","authors":"E. Wakelin, Giselle C. Yeo, A. Kondyurin, Michael J. Davies, D. Mckenzie, A. Weiss, M. Bilek","doi":"10.1117/12.2202506","DOIUrl":"https://doi.org/10.1117/12.2202506","url":null,"abstract":"Plasma immersion ion implantation (PIII) is used here to improve the surface bioactivity of polyether ether ketone (PEEK) by modifying the chemical and mechanical properties and by introducing radicals. Modifications to the chemical and mechanical properties are characterised as a function of ion fluence (proportional to treatment time) to determine the suitability of the treated surfaces for biological applications. Radical generation increases with treatment time, where treatments greater than 400 seconds result in a high concentration of long-lived radicals. Radical reactions are responsible for oxidation of the surface, resulting in a permanent increase in the polar surface energy. The nano-scale reduced modulus was found to increase with treatment time at the surface from 4.4 to 5.2 GPa. The macromolecular Young’s modulus was also found to increase, but by an amount corresponding to the volume fraction of the ion implanted region. The treated surface layer exhibited cracking under cyclical loads, associated with an increased modulus due to dehydrogenation and crosslinking, however it did not show any sign of delamination, indicating that the modified layer is well integrated with the substrate – a critical factor for bioactive surface coatings to be used in-vivo. Protein immobilisation on the PIII treated surfaces was found to saturate after 240 seconds of treatment, indicating that there is room to tune surface mechanical properties for specific applications without affecting the protein coverage. Our findings indicate that the modification of the chemical and mechanical properties by PIII treatments as well as the introduction of radicals render PEEK well suited for use in orthopaedic implantable devices.","PeriodicalId":320411,"journal":{"name":"SPIE Micro + Nano Materials, Devices, and Applications","volume":"117 35","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131912987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Optical parameter measurement of highly diffusive tissue body phantoms with specifically designed sample holder for photo diagnostic and PDT applications 高度扩散组织体幻影的光学参数测量与特别设计的样品支架的照片诊断和PDT应用

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202497

A. Rehman, K. Rehman, S. Anwar, S. Firdous, M. Nawaz

{"title":"Optical parameter measurement of highly diffusive tissue body phantoms with specifically designed sample holder for photo diagnostic and PDT applications","authors":"A. Rehman, K. Rehman, S. Anwar, S. Firdous, M. Nawaz","doi":"10.1117/12.2202497","DOIUrl":"https://doi.org/10.1117/12.2202497","url":null,"abstract":"Knowledge of optical properties (absorption coefficients, scattering Coefficients, and anisotropy) is necessary for understanding light tissue interactions. Optical parameters define the behavior of light in the tissues. Intralipid and Indian ink are well-established tissue body phantoms. Quantitative characterization of biological tissues in terms of optical properties is achieved with integrating sphere. However, samples having significantly higher scattering and absorption coefficients such as malignant tissues potentially reduce the signal to noise ratio (SNR) and accuracy of integrating sphere. We have measured the diffuse reflection and transmission of these phantoms by placing them in integrating sphere at 632.8 nm and then applied IAD method to determine the optical properties tissue phantoms composed of Indian ink (1.0%) and Intralipid (20%). We have fabricated a special sample holder with thin microscopic cover slips which can be used to measure signal from highly concentrated intralipid and Indian ink solutions. Experiments conducted with various phantoms reveal significant improvement of SNR for a wide range of optical properties. This approach opens up a field for potential applications in measurement of optical properties of highly diffusive biological tissues. For 20% intralipid μa =0.112±0.046 cm-1 and μs =392.299±10.090 cm-1 at 632.8 nm and for 1.0% Indian ink μa =9.808±0.490 cm-1 and μs =1.258±0.063 cm-1 at same wavelength. System shows good repeatability and reproducibility within 4.9% error. Work may have important biomedical applications in photo-diagnosis and Photodynamic therapy.","PeriodicalId":320411,"journal":{"name":"SPIE Micro + Nano Materials, Devices, and Applications","volume":"329 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117069269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Comparison of sensor structures for the signal amplification of surface plasmon resonance immunoassay using enzyme precipitation 酶沉淀法表面等离子体共振免疫分析信号放大传感器结构的比较

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202554

Chih‐Tsung Yang, B. Thierry

{"title":"Comparison of sensor structures for the signal amplification of surface plasmon resonance immunoassay using enzyme precipitation","authors":"Chih‐Tsung Yang, B. Thierry","doi":"10.1117/12.2202554","DOIUrl":"https://doi.org/10.1117/12.2202554","url":null,"abstract":"Surface plasmon resonance (SPR) biosensing has been successfully applied for the label-free detection of a broad range of bioanalytes ranging from bacteria, cell, exosome, protein and nucleic acids. When it comes to the detection of small molecules or analytes found at low concentration, amplification schemes are desirable to enhance binding signals and in turn increase sensitivity. A number of SPR signal amplification schemes have been developed and validated; however, little effort has been devoted to understanding the effect of the SPR sensor structures on the amplification of binding signals and therefore on the overall sensing performance. The physical phenomenon of long-range SPR (LRSPR) relies on the propagation of coupled surface plasmonic waves on the opposite sides of a nanoscale-thick noble metal film suspended between two dielectrics with similar refractive indices. Importantly, as compared with commonly used conventional SPR (cSPR), LRSPR is not only characterized by a longer penetration depth of the plasmonic waves in the analyzed medium but also by a greater sensitivity to bulk refractive index changes. In this work, an immunoassay signal amplification platform based on horseradish peroxidase (HRP) catalyzed precipitation was utilized to investigate the sensing performance with regards to cSPR and LRSPR. The enzymatic precipitation of 3, 3’-diaminobenzidine tetrahydrochloride (DAB)/H2O2 was used to amplify SPR signals. The structure-function relationship of cSPR and LRSPR sensors is presented for both standard refractometric measurements and the enzymatic precipitation scheme. Experimental data shows that despite its inherent higher sensitivity to bulk refractive index changes and higher figure of merit, LRSPR was characterized by a lower angular sensitivity in the model enzymatic amplification scheme used here.","PeriodicalId":320411,"journal":{"name":"SPIE Micro + Nano Materials, Devices, and Applications","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124965528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Electron-beam induced diamond-like-carbon passivation of plasmonic devices

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202567

E. Balaur, C. Sadatnajafi, D. Langley, Jiao Lin, S. Kou, B. Abbey

引用次数: 2

Luminescent solar concentrator improvement by stimulated emission 受激发射改进的发光太阳能聚光器

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202787

M. R. Kaysir, S. Fleming, Rowan W. MacQueen, T. Schmidt, A. Argyros

引用次数: 0

Plasmonic response in nanoporous metal: dependence on network topology 纳米多孔金属中的等离子体响应:对网络拓扑结构的依赖

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202278

Marc Gali, M. Tai, M. Arnold, M. Cortie, A. Gentle, Geoffrey B. Smith

{"title":"Plasmonic response in nanoporous metal: dependence on network topology","authors":"Marc Gali, M. Tai, M. Arnold, M. Cortie, A. Gentle, Geoffrey B. Smith","doi":"10.1117/12.2202278","DOIUrl":"https://doi.org/10.1117/12.2202278","url":null,"abstract":"The optical and electrical responses of open, nanoscale, metal networks are of interest in a variety of technologies including transparent conducting electrodes, charge storage, and surfaces with controlled spectral selectivity. The properties of such nanoporous structures depend on the shape and extent of individual voids and the associated hyper-dimensional connectivity and density of the metal filaments. Unfortunately, a quantitative understanding of this dependence is at present only poorly developed. Here we address this problem using numerical simulations applied to a systematically designed series of prototypical sponges. The sponges are produced by a Monte Carlo simulation of the dealloying of Ag-Al alloys containing from 60% to 85% Al. The result is a series of Ag sponges of realistic morphology. The optical properties of the sponges are then calculated by the discrete dipole approximation and the results used to construct an 'effective medium' model for each sponge. We show how the resulting effective medium can be correlated with the associated morphological characteristics of each target and how the optical properties are primarily controlled by the density of the sponge and its state of percolation.","PeriodicalId":320411,"journal":{"name":"SPIE Micro + Nano Materials, Devices, and Applications","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122715182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calculation of the dynamic characteristics of micro-mirror element based on thermal micro-actuators 基于热致动器的微镜元件动态特性计算

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202444

S. Evstafyev, S. Timoshenkov, Vyacheslav K. Samoilykov, N. Korobova, A. Timoshenkov, Anatolij M. Tereshhenko

{"title":"Calculation of the dynamic characteristics of micro-mirror element based on thermal micro-actuators","authors":"S. Evstafyev, S. Timoshenkov, Vyacheslav K. Samoilykov, N. Korobova, A. Timoshenkov, Anatolij M. Tereshhenko","doi":"10.1117/12.2202444","DOIUrl":"https://doi.org/10.1117/12.2202444","url":null,"abstract":"Paper presents a structure of a micro-mirror element driven by thermal micro-actuators. Micro-mirror dimensions are 100x100 um and it was manufactured by a surface micromachining using microelectronics technologies. Thermal microactuator is a bimorph structure consisting of aluminum and silicon dioxide layers with a polysilicon heater between them. The description of manufacturing process for micro-mirror element is given. The micro-mirror motion is achieved by passing an electric current through the heater. The actuator structure is heated and rotates the mirror. The processes of heating and cooling of thermal micro-actuator structure directly affects the characteristics of manufactured micro-mirror, thus the studying of these processes is essential. The report proposes a method for calculating the heating and cooling time, taking into account the influence of the structure geometry, electrical characteristics of external influence and the environment conditions. Also a method for the experimental determination of the dynamic characteristics is proposed, along with the method of electro-thermal analogy. The results of calculation are in good agreement with the experimental data, which allows one to use it to determine the dynamic characteristics of micro-devices based on thermal microactuators.","PeriodicalId":320411,"journal":{"name":"SPIE Micro + Nano Materials, Devices, and Applications","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126145419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantum plasmonics for next-generation optical and sensing technologies 用于下一代光学和传感技术的量子等离子体

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2220785

M. Moaied, K. Ostrikov

{"title":"Quantum plasmonics for next-generation optical and sensing technologies","authors":"M. Moaied, K. Ostrikov","doi":"10.1117/12.2220785","DOIUrl":"https://doi.org/10.1117/12.2220785","url":null,"abstract":"Classical plasmonics has mostly focused on structures characterized by large dimension, for which the quantummechanical effects have nearly no impact. However, recent advances in technology, especially on miniaturized plasmonics devices at nanoscale, have made it possible to imagine experimental applications of plasmons where the quantum nature of free charge carriers play an important role. Therefore, it is necessary to use quantum mechanics to model the transport of charge carriers in solid state plasma nanostructures. Here, a non-local quantum model of permittivity is presented by applying the Wigner equation with collision term in the kinetic theory of solid state plasmas where the dominant electron scattering mechanism is the electron-lattice collisions. The surface plasmon resonance of ultra-small nanoparticles is investigated using this non-local quantum permittivity and its dispersion relation is obtained. The successful application of this theory in ultra-small plasmonics structures such as surface plasmon polariton waveguides, doped semiconductors, graphene, the metamaterials composed of alternating layers of metal and dielectric, and the quantum droplets is anticipated.","PeriodicalId":320411,"journal":{"name":"SPIE Micro + Nano Materials, Devices, and Applications","volume":"118 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114002774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Development of functional nano-particle layer for highly efficient OLED 高效OLED功能纳米粒子层的研制

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202489

Jae‐Hyun Lee, Min‐Hoi Kim, Haechul Choi, Y. Choi

引用次数: 0

Tunable microwave notch filter created by stimulated Brillouin scattering in a silicon chip 利用硅芯片中受激布里渊散射制备的可调谐微波陷波滤波器

SPIE Micro + Nano Materials, Devices, and Applications Pub Date : 2015-12-22 DOI: 10.1117/12.2202488

A. Casas-Bedoya, B. Morrison, M. Pagani, D. Marpaung, B. Eggleton

引用次数: 1