Micro and Nano Engineering最新文献_第4页

Recent progress on gold nanoparticle biosensors monitored water quality: Insights on diversified contaminants and functionalization paradigms 监测水质的金纳米粒子生物传感器的最新进展：关于多样化污染物和功能化范例的见解

Micro and Nano Engineering Pub Date : 2024-05-18 DOI: 10.1016/j.mne.2024.100261

Parth Malik , Ruma Rani , Rachna Gupta , Rakesh Kumar Ameta , Tapan Kumar Mukherjee

{"title":"Recent progress on gold nanoparticle biosensors monitored water quality: Insights on diversified contaminants and functionalization paradigms","authors":"Parth Malik , Ruma Rani , Rachna Gupta , Rakesh Kumar Ameta , Tapan Kumar Mukherjee","doi":"10.1016/j.mne.2024.100261","DOIUrl":"https://doi.org/10.1016/j.mne.2024.100261","url":null,"abstract":"<div><p>Over the past few years, water quality monitoring has swiftly emerged as a thrust area for most of the developing nations. Despite its renewable essence, incessant industrialization and urbanization have depleted the natural water resources, culminating in adverse impact on potable water quality. As a consequence, reliable technologies with utmost sensitivity and accurate predictions <em>vis-à-vis</em> authentic qualitative standards are urgently needed. Herein, interest in using gold nanoparticles (Au NPs) biosensors to gauge the qualitative profile of water resources has been quite significant. Major fascinations for Au NPs biosensing driven water quality monitoring are steadfast preparation methodologies, well-understood mechanisms for size-shape modulation and inert sensitivity manifested remarkable functionalization abilities. The size-shape modulated functionalization advances for Au NPs are the dynamic outcomes of their quantum effects, anchored <em>via</em> single or multidimensional quantum confinements (QCs). Morphologies as vibrant as rod, spherical, cylindrical, shells and combinatorial regime have been the backbone aspects of Au NPs based biosensors. With such insights, the present article focuses on last decade noted advances aimed at Au NPs biosensors assessed water quality. The studies discussed herewith were retrieved from Pubmed using the keywords, “Gold Nanoparticle Biosensors for Water Quality Monitoring”. The knowledge shared herein could consolidate the fabrication of future Au nanomaterials based sensing technologies <em>vis-à-vis</em> functionalization mechanisms, cost considerations, precision aspects, integrated possibilities and long-term cautions.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100261"},"PeriodicalIF":0.0,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000248/pdfft?md5=035af649efca26b4d1459d91ee82964f&pid=1-s2.0-S2590007224000248-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141090183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Plasmonic metamaterial absorber for MWIR and LWIR bispectral microbolometers 用于中波红外和低波红外双谱微测辐射计的等离子超材料吸收器

Micro and Nano Engineering Pub Date : 2024-05-16 DOI: 10.1016/j.mne.2024.100262

Alexander Litke , Elahe Zakizade , Marvin Michel , Sascha Weyers , Anna Lena Schall-Giesecke

{"title":"Plasmonic metamaterial absorber for MWIR and LWIR bispectral microbolometers","authors":"Alexander Litke , Elahe Zakizade , Marvin Michel , Sascha Weyers , Anna Lena Schall-Giesecke","doi":"10.1016/j.mne.2024.100262","DOIUrl":"10.1016/j.mne.2024.100262","url":null,"abstract":"<div><p>Plasmonic metamaterial absorbers (PMAs) designed for multispectral imaging in the infrared (IR) with uncooled microbolometers are investigated. The study presents Fourier transform infrared spectroscopy (FTIR) measurements of PMAs consisting of metal-insulator-metal-stacks (MIM) with square-shaped micropatches as top metal layers. The measurements reveal high absorptances of 82% to 99% for distinct wavelengths within a range from 2 μm to 9.2 μm. The spectra are evaluated with respect to the lateral dimensions of the patches and to the refractive indices of the used dielectrics SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub> and Ta<sub>2</sub>O<sub>5</sub>. Numerical simulations and analytical calculations of the TM<sub>010</sub>-mode using the transmission line model (TLM) for microstrip antennas show good qualitative agreement with the measurement results. Additionally, bispectral PMAs were fabricated consisting of fields of PMAs with two different patch sizes arranged in a chessboard pattern. The individual fields of this pattern correspond to microbolometers with 12 μm pitch in shape and size. Two distinct absorption maxima can be seen in the spectra measured by FTIR. The choice of materials, deposition methods and patterning processes is suitable for the integration into the existing Fraunhofer IMS's nanotube microbolometer technology to realize multispectral infrared imaging. The fabrication process is CMOS-compatible and carried out on 8-in. wafers.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100262"},"PeriodicalIF":0.0,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259000722400025X/pdfft?md5=f4203714dbb897b05b563c1db386a14d&pid=1-s2.0-S259000722400025X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141024538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of hydrothermally-produced ZnO nanorods and the mechanisms of Li incorporation as a possible dopant 研究水热法生产的氧化锌纳米棒以及锂作为一种可能的掺杂剂的掺入机理

Micro and Nano Engineering Pub Date : 2024-05-15 DOI: 10.1016/j.mne.2024.100260

Georgios P. Papageorgiou , Nikolaos Boukos , Maria Androulidaki , Dimitrios Christofilos , Vassilis Psycharis , Maria Katsikini , Fani Pinakidou , Eleni C. Paloura , Christoforos Krontiras , Eleni Makarona

{"title":"Investigation of hydrothermally-produced ZnO nanorods and the mechanisms of Li incorporation as a possible dopant","authors":"Georgios P. Papageorgiou , Nikolaos Boukos , Maria Androulidaki , Dimitrios Christofilos , Vassilis Psycharis , Maria Katsikini , Fani Pinakidou , Eleni C. Paloura , Christoforos Krontiras , Eleni Makarona","doi":"10.1016/j.mne.2024.100260","DOIUrl":"https://doi.org/10.1016/j.mne.2024.100260","url":null,"abstract":"<div><p>Zinc oxide (ZnO) has emerged as one of the most promising candidates for mass-producing cost-efficient optoelectronic devices. This is primarily because it can be synthesized in high-quality nanostructures on a wide range of substrates through relatively simple chemical methods. However, producing p-type ZnO, regardless of the chosen method, remains an open and controversial issue. In this work, Li-doped ZnO nanostructures of varying Li-cocnentration were produced via a two-step hydrothermal growth synthesis and an in-depth analysis based on with Field Emission Scanning Electron Microscopy (FE-SEM), X-ray diffraction (XRD), Raman Spectroscopy, Extended X-Ray Absorption Fine Structure (EXAFS) Spectroscopy, and temperature-dependent Photoluminescence (PL) was carried out in an effort to gain insights into the Li-incorporation mechanisms. The findings indicated a strong interplay between the native defects responsible for the inherent n-type character of the material and Li incorporation. It is suggested that this interplay hinders the successful conversion of the Li-doped nanorods into p-type nanostructures and that when employing the hydrothermal approach it is essential to identify the precise conditions necessary for genuine Li incorporation as a Zn substitutional.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100260"},"PeriodicalIF":0.0,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000236/pdfft?md5=9550786a76dde3a2bafc733a00d2da47&pid=1-s2.0-S2590007224000236-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141067393","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanophotonic integrated active-passive InP membrane devices and circuits fabricated using ArF scanner lithography 利用 ArF 扫描光刻技术制造的纳米光子集成有源-无源 InP 膜器件和电路

Micro and Nano Engineering Pub Date : 2024-05-13 DOI: 10.1016/j.mne.2024.100258

Aleksandr Zozulia , Jeroen Bolk , Rene van Veldhoven , Gleb Nazarikov , Vadim Pogoretskiy , Samir Rihani , Graham Berry , Kevin Williams , Yuqing Jiao

{"title":"Nanophotonic integrated active-passive InP membrane devices and circuits fabricated using ArF scanner lithography","authors":"Aleksandr Zozulia , Jeroen Bolk , Rene van Veldhoven , Gleb Nazarikov , Vadim Pogoretskiy , Samir Rihani , Graham Berry , Kevin Williams , Yuqing Jiao","doi":"10.1016/j.mne.2024.100258","DOIUrl":"https://doi.org/10.1016/j.mne.2024.100258","url":null,"abstract":"<div><p>We present a novel fabrication approach to an integrated nanophotonic platform, based on a III-V membrane bonded to a Si substrate with benzocyclobutene (BCB). The process incorporates a hybrid lithography strategy combining deep-UV and electron-beam lithography on the same wafer. We report for the first time the usage of deep-UV scanner lithography for the fabrication of the active-passive tapers and sub-micron waveguides on the same wafer, which enables better critical dimension control, uniformity, and reproducibility. The platform uses an active-passive butt-joint interface and includes components such as distributed feedback (DFB) and distributed Bragg reflector (DBR) lasers, electro-optical (EO) and electro-absorption (EA) modulators, and sub-micron ultra-confined passive waveguides, all monolithically integrated into a single membrane layer. The active devices have a heat sink achieved by ultra-thin BCB bonding. Lasers demonstrate up to 26 mW of optical power in the waveguide and a direct modulation bandwidth of up to 21 GHz. The modulators show static extinction up to 28.8 dB.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100258"},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000212/pdfft?md5=d5fd93e8bf263fb4464f4415b20d46ae&pid=1-s2.0-S2590007224000212-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140951304","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cross-sectional geometry effect on bending strength of gold micro-cantilever with trapezoidal cross-section 横截面几何形状对梯形截面金微型悬臂弯曲强度的影响

Micro and Nano Engineering Pub Date : 2024-05-11 DOI: 10.1016/j.mne.2024.100259

Ryohei Hori , Kazuya Fujita , Chun Yi Chen , Tomoyuki Kurioka , Jhen-Yang Wu , Tso-Fu Mark Chang , Katsuyuki Machida , Hiroyuki Ito , Yoshihiro Miyake , Masato Sone

{"title":"Cross-sectional geometry effect on bending strength of gold micro-cantilever with trapezoidal cross-section","authors":"Ryohei Hori , Kazuya Fujita , Chun Yi Chen , Tomoyuki Kurioka , Jhen-Yang Wu , Tso-Fu Mark Chang , Katsuyuki Machida , Hiroyuki Ito , Yoshihiro Miyake , Masato Sone","doi":"10.1016/j.mne.2024.100259","DOIUrl":"https://doi.org/10.1016/j.mne.2024.100259","url":null,"abstract":"<div><p>Gold is a promising material for movable components in MEMS devices by the high mass density, which allows reduction of the Brownian noise. Mechanical properties of metallic materials are known to be affected by the sample size effect. When bending test is utilized, the sample geometry effect is another factor. In this study, effects of the shape of the cross-section, or the cross-sectional geometry effect, are evaluated using micro-cantilevers with a trapezoidal cross-section. The yield stresses are ranged from 112 MPa to 185 MPa in micro-cantilevers composed of single crystalline gold, and the yield stresses varied from 372 MPa to 489 MPa in polycrystalline gold micro-cantilevers. The yield stress is found to be higher in the micro-cantilever having a smaller ratio of the top width over the bottom width, which demonstrates the cross-sectional geometry effect. Also, the cross-sectional geometry effect is more significant in the polycrystalline micro-cantilevers.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100259"},"PeriodicalIF":0.0,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000224/pdfft?md5=c975d3baea9813e31a1d20e50884ceb8&pid=1-s2.0-S2590007224000224-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140951303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fabrication of pyrolytic carbon interdigitated microelectrodes by maskless UV photolithography with epoxy-based photoresists SU-8 and mr-DWL 利用环氧基光刻胶 SU-8 和 mr-DWL，通过无掩模紫外光刻技术制造热解碳插接微电极

Micro and Nano Engineering Pub Date : 2024-05-08 DOI: 10.1016/j.mne.2024.100257

Nicolai Støvring , Babak Rezaei , Arto Heiskanen , Jenny Emnéus , Stephan Sylvest Keller

{"title":"Fabrication of pyrolytic carbon interdigitated microelectrodes by maskless UV photolithography with epoxy-based photoresists SU-8 and mr-DWL","authors":"Nicolai Støvring , Babak Rezaei , Arto Heiskanen , Jenny Emnéus , Stephan Sylvest Keller","doi":"10.1016/j.mne.2024.100257","DOIUrl":"10.1016/j.mne.2024.100257","url":null,"abstract":"<div><p>Maskless UV photolithography is increasingly used, especially in research environments where low turn-around time for new designs improves productivity. Here, we fabricate pyrolytic carbon interdigitated microelectrodes with small interelectrode gaps, good adhesion to the carrier substrate, high surface area and excellent electrochemical properties using maskless UV photolithography with two negative epoxy-based photoresists, namely the commonly used SU-8 and the recently developed mr-DWL. The minimum realizable trench width in 15 μm thick photoresist films is 2.4 ± 0.15 μm for mr-DWL 5 and 3.1 ± 0.10 μm for SU-8 2035. After pyrolysis, the two resulting pyrolytic carbon materials show similar electrochemical properties. However, shrinkage during pyrolysis is significantly lower for mr-DWL compared to SU-8, which is beneficial for the fabrication of interdigitated microelectrodes. Furthermore, delamination of the electrodes during processing and operation is prevented due to the introduction of poly silicon adhesion structures. This work provides valuable insights into maskless UV lithography as well as into the pyrolytic carbon process to increase the yield, performance and productivity for fabrication of microelectrodes.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100257"},"PeriodicalIF":0.0,"publicationDate":"2024-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000200/pdfft?md5=60673ebe8420e6820b9903f3d1fe7dce&pid=1-s2.0-S2590007224000200-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141049018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controlled wettability of biphilic patterned surfaces for enhanced atmospheric water harvesting 控制双亲图案表面的润湿性，增强大气集水能力

Micro and Nano Engineering Pub Date : 2024-04-30 DOI: 10.1016/j.mne.2024.100255

Joyce Estephan, Marie Panabière, Camille Petit-Etienne, Sebastien Labau, Léo Bon, Jean-Hervé Tortai, Cécile Gourgon

{"title":"Controlled wettability of biphilic patterned surfaces for enhanced atmospheric water harvesting","authors":"Joyce Estephan, Marie Panabière, Camille Petit-Etienne, Sebastien Labau, Léo Bon, Jean-Hervé Tortai, Cécile Gourgon","doi":"10.1016/j.mne.2024.100255","DOIUrl":"https://doi.org/10.1016/j.mne.2024.100255","url":null,"abstract":"<div><p>Water is a vital component for all living organisms, yet persistent water scarcity remains a global challenge. One potential solution lies in replicating the atmospheric water collection mechanism observed in the Stenocara beetle, characterized by a dorsal surface featuring alternating hydrophilic and hydrophobic regions. In this study, we have designed and examined two distinct biphilic patterned surface configurations, integrating various technologies, to mimic the beetle's water collection strategy. Our investigation evaluates the efficiency of these surfaces in both capturing water from fog and condensing water from dew. For fog collection two parameters were the most impactful: the roughness and the wettability contrast between hydrophilic and hydrophobic zones. In contrast, dew condensation was influenced by additional parameters notably the patterns' size and density that directly affect the water contact angle. It is worth noting, however, that the optimal surface for fog collection may not necessarily coincide with the most effective surface for dew condensation. Furthermore, our research includes a comparative analysis between the theoretically predicted volume of water droplet departure and the empirically observed results.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100255"},"PeriodicalIF":0.0,"publicationDate":"2024-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000182/pdfft?md5=ceffce399788bdc2ff24b6d2f8ce8bee&pid=1-s2.0-S2590007224000182-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140844409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CVD graphene-MoS2 Van der Waals heterostructures on the millimeter-scale 毫米尺度的 CVD 石墨烯-MoS2 范德华异质结构

Micro and Nano Engineering Pub Date : 2024-04-28 DOI: 10.1016/j.mne.2024.100256

Nico Rademacher , Eros Reato , Lukas Völkel , Annika Grundmann , Michael Heuken , Holger Kalisch , Andrei Vescan , Alwin Daus , Max C. Lemme

{"title":"CVD graphene-MoS2 Van der Waals heterostructures on the millimeter-scale","authors":"Nico Rademacher , Eros Reato , Lukas Völkel , Annika Grundmann , Michael Heuken , Holger Kalisch , Andrei Vescan , Alwin Daus , Max C. Lemme","doi":"10.1016/j.mne.2024.100256","DOIUrl":"https://doi.org/10.1016/j.mne.2024.100256","url":null,"abstract":"<div><p>This study investigates the interactions between chemical vapor-deposited graphene and metal-organic chemical vapor-deposited molybdenum disulfide (MoS<sub>2</sub>) in heterostructures assembled via wet transfer. We use Raman spectroscopy to quantitatively determine close coupling between graphene and MoS<sub>2</sub> based on the peak separations in graphene. Although annealing seems to be necessary after transfer to establish a close coupling, its parameters do not have a significant impact on the quality of coupling (for 100 °C < <em>T</em> < 400 °C and 5 min < <em>t</em> < 120 min). Furthermore, the method is robust against variations in graphene thickness because bilayers can be distinguished by comparing the full width at half maximum of the graphene 2D peak. We expand our study to mm<sup>2</sup>-scale areas of graphene-MoS<sub>2</sub> heterostructures finding that films assembled via wet-transfer technique exhibit considerable variability in terms of coupling strength. Evaluating such interactions in heterostructures on large areas is important for future practical applications in heterostructure devices.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100256"},"PeriodicalIF":0.0,"publicationDate":"2024-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000194/pdfft?md5=342c3ffee3f2291ee9ca619303288e95&pid=1-s2.0-S2590007224000194-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140824232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of the strain rate in compression of electrodeposited gold micro-pillars toward the design of MEMS components 电沉积金微柱压缩应变率对微机电系统元件设计的影响

Micro and Nano Engineering Pub Date : 2024-04-23 DOI: 10.1016/j.mne.2024.100254

Shota Kanno , Taro Omura , Jhen-Yang Wu , Tomoyuki Kurioka , Chun-Yi Chen , Parthojit Chakraborty , Katsuyuki Machida , Hiroyuki Ito , Yoshihiro Miyake , Masato Sone , Tso-Fu Mark Chang

{"title":"Effects of the strain rate in compression of electrodeposited gold micro-pillars toward the design of MEMS components","authors":"Shota Kanno , Taro Omura , Jhen-Yang Wu , Tomoyuki Kurioka , Chun-Yi Chen , Parthojit Chakraborty , Katsuyuki Machida , Hiroyuki Ito , Yoshihiro Miyake , Masato Sone , Tso-Fu Mark Chang","doi":"10.1016/j.mne.2024.100254","DOIUrl":"https://doi.org/10.1016/j.mne.2024.100254","url":null,"abstract":"<div><p>In this study, the strain rate dependence in yield strengths of electrodeposited gold micro-pillars is evaluated for the design of movable components in MEMS devices. The micro-pillars are fabricated from electrodeposited gold by focused ion beam system. The strain rate dependence is quantified by the strain rate sensitivity, and the strain rate sensitivity is calculated from the yield strength obtained from compression tests of the gold micro-pillars having different sizes at different strain rates. An increase in the yield strength following a reduction in the pillar size is observed, which is the sample size effect. Also, weakening of the yield strength is observed following a decrease in the strain rate, which is the strain rate dependence, and the strain rate sensitivity of the gold micro-pillars is found be at roughly 0.03.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100254"},"PeriodicalIF":0.0,"publicationDate":"2024-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000170/pdfft?md5=2e1d5e856d9a5174587acc53b7d0f432&pid=1-s2.0-S2590007224000170-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140645225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Wheatstone bridge sensor arrays in foil by robust μ-via technology combining femtosecond-laser drilling and pulsed electrodeposition 通过结合飞秒激光钻孔和脉冲电沉积的鲁棒性 μ-via 技术在箔片中形成惠斯通电桥传感器阵列

Micro and Nano Engineering Pub Date : 2024-04-20 DOI: 10.1016/j.mne.2024.100252

Maolei Zhou, Yadi Zhen, Andreas Dietzel

{"title":"Wheatstone bridge sensor arrays in foil by robust μ-via technology combining femtosecond-laser drilling and pulsed electrodeposition","authors":"Maolei Zhou, Yadi Zhen, Andreas Dietzel","doi":"10.1016/j.mne.2024.100252","DOIUrl":"https://doi.org/10.1016/j.mne.2024.100252","url":null,"abstract":"<div><p>Flexible sensor arrays with multilevel circuits typically require complex production cycles leading to high costs and reliability issues. For establishing flexible arrays of strain sensors in Wheatstone bridge configurations structures on different levels within flexible films have to be connected by robust μ-via technology. Usually, dry etching is used to establish via-holes and direct current (DC) electrodeposition is used to fill them with copper. However, dry etching can lead to damages in the underlying electrode or incomplete removal of polymeric material, as inhomogeneities of polymeric foil thicknesses cannot completely be eliminated. This affects the quality of the plating and the reliability of the μ-via connections. It is aggravated by the fact that DC electroplated copper is often weakened by various defects, such as small voids. This article describes a reliable and less complex fabrication process for a Wheatstone bridge sandwich structure consisting of five polymer interlayers separating four metal layers. The femtosecond-laser μ-via drilling proved to be fast, material selective and therefore tolerant to inhomogeneities of polymeric foil thicknesses. Moreover, pulsed current (PC) electrodeposition significantly improved the quality of the copper filling. No voids were found using electron microscopy. Finally, the respiration monitoring sensors produced using this method were subjected to repetitive cycles of bending and relaxation. At a frequency of five cycles per second, reproducible cycles of signal changes were obtained, indicating the usefulness for detecting respiratory cycles of premature infants.</p></div>","PeriodicalId":37111,"journal":{"name":"Micro and Nano Engineering","volume":"23 ","pages":"Article 100252"},"PeriodicalIF":0.0,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590007224000157/pdfft?md5=36f574491110d65f5414a3f6e29f78e9&pid=1-s2.0-S2590007224000157-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140638400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0