Micro and Nano Systems Letters最新文献_第9页

Synthesis of metallic aluminum particles by electrolysis in aqueous solution 水溶液中电解合成金属铝颗粒的研究

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-12-08 DOI: 10.1186/s40486-021-00141-4

Takefumi Hosoya, Takehiro Yonezawa, Noriko Yamauchi, Kouichi Nakashima, Yoshio Kobayashi

{"title":"Synthesis of metallic aluminum particles by electrolysis in aqueous solution","authors":"Takefumi Hosoya, Takehiro Yonezawa, Noriko Yamauchi, Kouichi Nakashima, Yoshio Kobayashi","doi":"10.1186/s40486-021-00141-4","DOIUrl":"10.1186/s40486-021-00141-4","url":null,"abstract":"<div><p>The present work proposes a method for fabricating metallic Al particles in aqueous solution. An aqueous colloidal solution was prepared from an aqueous aluminum nitrate nonahydrate solution by electrolysis using metallic Al plates as the anode and cathode under ultrasonic irradiation in water at 25–45 °C. The sizes of the particles in the colloidal solutions prepared at 25, 35, and 45 °C were 76.3, 77.0, and 84.7 nm, respectively. The powder obtained from the colloidal solution prepared at 25 °C was not crystalline. By contrast, the powders obtained from the colloidal solutions prepared at 35 and 45 °C had a crystal structure of cubic Al and crystal sizes of 55.7 and 59.3 nm, respectively. Thus, elevated temperatures promoted both particle growth and crystal growth, which was explained by higher temperatures increasing the frequency and energy of particle collisions. The metallic Al particles were chemically stable in both an aqueous solution and the ambient atmosphere. The chemically stable metallic Al particles are expected to be used as sources for fabricating materials related to fuels, energy storage, and pigments.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"9 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-021-00141-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138520614","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

CMOS voltage-controlled oscillator with high-performance MEMS tunable inductor 具有高性能MEMS可调谐电感的CMOS压控振荡器

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-11-26 DOI: 10.1186/s40486-021-00140-5

Uikyu Chae, Jeongsoo Park, Jeong-Geun Kim, Hyun-Yong Yu, Il-Joo Cho

{"title":"CMOS voltage-controlled oscillator with high-performance MEMS tunable inductor","authors":"Uikyu Chae, Jeongsoo Park, Jeong-Geun Kim, Hyun-Yong Yu, Il-Joo Cho","doi":"10.1186/s40486-021-00140-5","DOIUrl":"10.1186/s40486-021-00140-5","url":null,"abstract":"<div><p>LC CMOS voltage-controlled oscillators (VCOs) with tunable inductors are essential for high-performance, multi-band communication systems, such as IoT applications and 5G communication. However, VCOs that use CMOS tunable inductors have difficulty in achieving high RF performance due to the low Q-factor of the inductor. In addition, previously reported CMOS VCOs integrated with MEMS inductors have used CMOS switches for tuning frequency bands, but they also had large signal losses on the switch. Herein, we propose a CMOS VCO that is integrated with a MEMS tunable inductor that tunes the frequency band with three MEMS switches. The proposed MEMS tunable inductor enables us to achieve high RF performance due to the suspended structure, and RF MEMS switches enable lower signal loss than CMOS switches. In this work, we successfully fabricated the proposed CMOS VCO integrated with a MEMS tunable inductor using the flip-chip bonding process, and we measured oscillation frequencies according to the actuation of the three switches. The oscillation powers were measured as − 3.03 dBm @ 1.39 GHz, − 5.80 @ 1.98 GHz, − 7.44 dBm @ 2.81 GHz, and − 8.77 dBm @ 3.68 GHz.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"9 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2021-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-021-00140-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138520594","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

Efficacy in degradation of carcinogenic pollutant sulforhodamine B by green synthesized silver nanoparticles 绿色合成纳米银对致癌物硫代丹B的降解效果

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-11-22 DOI: 10.1186/s40486-021-00138-z

Ramakrishnan Jayakrishnan, Anju Joseph, Vinoy Thomas

引用次数: 0

Stereoscopic facial imaging for pain assessment using rotational offset microlens arrays based structured illumination 基于结构照明的旋转偏置微透镜阵列用于疼痛评估的立体面部成像

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-11-15 DOI: 10.1186/s40486-021-00139-y

Jae-Myeong Kwon, Sung-Pyo Yang, Ki-Hun Jeong

引用次数: 0

A highly smart MEMS acetone gas sensors in array for diet-monitoring applications 一种用于饮食监测应用的高智能MEMS丙酮气体传感器阵列

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-10-30 DOI: 10.1186/s40486-021-00136-1

Jae Eun Lee, Chan Kyu Lim, Hyunjoon Song, Sung-Yool Choi, Dae-Sik Lee

引用次数: 0

Effects of low temperature on electrophysiology and mechanophysiology of human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) 低温对人类诱导多能干细胞衍生心肌细胞（hiPSC-CMs）电生理学和机械生理学的影响

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-10-28 DOI: 10.1186/s40486-021-00135-2

Pooja P. Kanade, Nomin-Erdene Oyunbaatar, Dong-Weon Lee

引用次数: 0

Influence of citrate buffer and flash heating in enhancing the sensitivity of ratiometric genosensing of Hepatitis C virus using plasmonic gold nanoparticles 柠檬酸缓冲液和闪蒸加热对提高等离子体金纳米颗粒比例基因感测丙型肝炎病毒敏感性的影响

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-10-26 DOI: 10.1186/s40486-021-00134-3

Hrishikesh Shashi Prakash, Pranay Amruth Maroju, Naga Sai Sriteja Boppudi, Aniket Balapure, Ramakrishnan Ganesan, Jayati Ray Dutta

{"title":"Influence of citrate buffer and flash heating in enhancing the sensitivity of ratiometric genosensing of Hepatitis C virus using plasmonic gold nanoparticles","authors":"Hrishikesh Shashi Prakash, Pranay Amruth Maroju, Naga Sai Sriteja Boppudi, Aniket Balapure, Ramakrishnan Ganesan, Jayati Ray Dutta","doi":"10.1186/s40486-021-00134-3","DOIUrl":"10.1186/s40486-021-00134-3","url":null,"abstract":"<div><p>Gold nanoparticles (Au NPs) based technology has been shown to possess enormous potential in the viral nucleic acid diagnosis. Despite significant advancement in this domain, the existing literature reveals the diversity in the conditions employed for hybridization and tagging of thiolated nucleic acid probes over the Au NPs. Here we employ the probe sequence derived from the Hepatitis C virus to identify the optimal hybridization and thiol-Au NP tagging conditions. In a typical polymerase chain reaction, the probes are initially subjected to flash heating at elevated temperatures to obtain efficient annealing. Motivated by this, in the current study, the hybridization between the target and the antisense oligonucleotide (ASO) has been studied at 65 °C with and without employing flash heating at temperatures from 75 to 95 °C. Besides, the efficiency of the thiolated ASO’s tagging over the Au NPs with and without citrate buffer has been explored. The study has revealed the beneficial role of flash heating at 95 °C for efficient hybridization and the presence of citrate buffer for rapid and effective thiol tagging over the Au NPs. The combinatorial effect of these conditions has been found to be advantageous in enhancing the sensitivity of ratiometric genosensing using Au NPs.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"9 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2021-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-021-00134-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138520604","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

Continuous preparation of bicelles using hydrodynamic focusing method for bicelle to vesicle transition 用水动力聚焦法连续制备小囊体，使小囊体向囊泡过渡

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-10-25 DOI: 10.1186/s40486-021-00133-4

SungHak Choi, BongSu Kang, Toshinori Shimanouchi, Keesung Kim, HoSup Jung

{"title":"Continuous preparation of bicelles using hydrodynamic focusing method for bicelle to vesicle transition","authors":"SungHak Choi, BongSu Kang, Toshinori Shimanouchi, Keesung Kim, HoSup Jung","doi":"10.1186/s40486-021-00133-4","DOIUrl":"10.1186/s40486-021-00133-4","url":null,"abstract":"<div><p>Bicelle is one of the most stable phospholipid assemblies, which has tremendous applications in the research areas for drug delivery or structural studies of membrane proteins owing to its bio-membrane mimicking characteristics and high thermal stability. However, the conventional preparation method for bicelle demands complicated manufacturing processes and a long time so that the continuous synthesis method of bicelle using microfluidic chip has been playing an important role to expand its feasibility. We verified the general availability of hydrodynamic focusing method with microfluidic chip for bicelle synthesis using various kinds of lipids which have a phase transition temperature ranged from − 2 to 41 °C. Bicelle can be formed only when the inside temperature of microfluidic chip was over the phase transition temperature. Moreover, the concentration condition for bicelle formation varied depending on the lipids. Furthermore, the transition process characteristics from bicelle to vesicle were analyzed by effective q-value, mixing time and dilution condition. We verified that the size of transition vesicles was controlled according to the effective q-value, mixing time, and temperature.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"9 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-021-00133-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138520619","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

Copper micromesh-based lightweight transparent conductor with short response time for wearable heaters 用于可穿戴式加热器的基于铜微网的轻质透明导体，响应时间短

IF 4.7

Micro and Nano Systems Letters Pub Date : 2021-10-25 DOI: 10.1186/s40486-021-00132-5

Han-Jung Kim, Yoonkap Kim

{"title":"Copper micromesh-based lightweight transparent conductor with short response time for wearable heaters","authors":"Han-Jung Kim, Yoonkap Kim","doi":"10.1186/s40486-021-00132-5","DOIUrl":"10.1186/s40486-021-00132-5","url":null,"abstract":"<div><p>Thickness-controlled transparent conducting films (TCFs) were fabricated by transfer printing a 100 nm thick Cu micromesh structure onto poly(vinyl alcohol) (PVA) substrates of different thicknesses (~ 50, ~ 80, and ~ 120 μm) to develop a lightweight transparent wearable heater with short response time. The Cu mesh-based TCF fabricated on a ~ 50 µm thick PVA substrate exhibited excellent optical and electrical properties with a light transmittance of 86.7% at 550 nm, sheet resistance of ~ 10.8 Ω/sq, and figure-of-merit of approximately 236, which are comparable to commercial indium tin oxide film-based transparent conductors. The remarkable flexibility of the Cu mesh-based TCF was demonstrated through cyclic mechanical bending tests. In addition, the Cu mesh-based TCF with ~ 50 μm thick PVA substrate demonstrated a fast Joule heating performance with a thermal response time of ~ 18.0 s and a ramping rate of ~ 3.0 ℃/s under a driving voltage of 2.5 V. Lastly, the reliable response and recovery characteristics of the Cu mesh/PVA film-based transparent heater were confirmed through the cyclic power test. We believe that the results of this study is useful in the development of flexible transparent heaters, including lightweight deicing/defogging films, wearable sensors/actuators, and medical thermotherapy pads.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"9 1","pages":""},"PeriodicalIF":4.7,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-021-00132-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138520620","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

Multiple ratiometric nanothermometry using semiconductor BiFeO3 nanowires and quantitative validation of thermal sensitivity 使用半导体BiFeO3纳米线的多比率纳米测温法和热敏性的定量验证

IF 3.6

Micro and Nano Systems Letters Pub Date : 2021-10-14 DOI: 10.36227/techrxiv.16780459

K. Prashanthi, K. K. Krishna Mohan, Ž. Antić, K. Ahadi, M. Dramićanin

引用次数: 2