Micro and Nano Systems Letters最新文献_第4页

Dispersion and agglomeration of carbon nanoclusters in 4-(trans-4′-hexylcyclohexyl)-isothiocyanatobenzene media on ITO and graphene surfaces: role of surface effect 碳纳米团簇在4-(反式-4 ' -己基环己基)-异硫氰酸苯介质中在ITO和石墨烯表面的分散和团聚:表面效应的作用

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-11-30 DOI: 10.1186/s40486-023-00182-x

Archana Kumari Singh, Satya Pal Singh

{"title":"Dispersion and agglomeration of carbon nanoclusters in 4-(trans-4′-hexylcyclohexyl)-isothiocyanatobenzene media on ITO and graphene surfaces: role of surface effect","authors":"Archana Kumari Singh, Satya Pal Singh","doi":"10.1186/s40486-023-00182-x","DOIUrl":"10.1186/s40486-023-00182-x","url":null,"abstract":"<div><p>We have synthesized carbon nanoparticles using mandarin juice via green synthesis rout. We have doped carbon nanoparticles in liquid crystal media and studied the surface effect on self-assembly of carbon nanoclusters on ITO coated glass surface and on graphene sheet. The purpose of this study is to construct uniform nano-micro droplets for novel applications and to understand and explore the underlying science behind molecular scale reorganization in the presence of functional surfaces like graphene. We have used density functional theory approach to confirm that the carbon nanoparticles in globular structures are dispersed in presence of graphene sheet due to chemical interaction of carbon rings (or say carbon nanoparticles) with graphene carbon atoms. In order to minimize the free energy, the carbon nanoparticles leave the carbon globular structures and are dispersed to form rectangular structures in presence of LC media at graphene surface. The carbon nanoparticles are dispersed to increase contact area with graphene surface. The results are useful in construction of desired nano-micro structures for possible novel purposes in medical field since carbon nanoparticles are biocompatible. Optical microscopy, FESEM, NMR and UV spectra verifies the droplet formation and its effect on the surface and electronic properties of carbon nanoparticles.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00182-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138468365","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

Development of an amperometric sensor for epinephrine determination using an Azure A/silver nanocluster modified electrode 采用Azure A/银纳米簇修饰电极的肾上腺素测定安培传感器的研制

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-11-29 DOI: 10.1186/s40486-023-00174-x

C. Priya, S. Anuja, R. Suresh Babu, S. Sriman Narayanan

{"title":"Development of an amperometric sensor for epinephrine determination using an Azure A/silver nanocluster modified electrode","authors":"C. Priya, S. Anuja, R. Suresh Babu, S. Sriman Narayanan","doi":"10.1186/s40486-023-00174-x","DOIUrl":"10.1186/s40486-023-00174-x","url":null,"abstract":"<div><p>A novel electrochemical sensor was developed for the detection of Epinephrine (EP) utilizing Azure A (AzA), a phenothiazine dye, and citrate-capped silver nanoparticles. The interaction between Azure A and silver nanoparticles facilitated the formation of AzA/silver nanoclusters through a self-assembled approach. The morphological analysis of AzA/silver nanoclusters was conducted using field-emission scanning electron microscopy (FESEM). The nanoclusters were then immobilized on a graphite electrode via a simple drop-casting method, resulting in a modified electrode. The electrochemical properties of the modified electrode were investigated using cyclic voltammetry and linear sweep voltammetry techniques. The modified electrode exhibited enhanced electrocatalytic oxidation of EP at a lower oxidation potential of 0.27 V. The electrochemical analysis demonstrated that the modified electrode functioned as an amperometric sensor, enabling the detection of EP within a concentration range of 4.6 × 10<sup>–7</sup> to 3.6 × 10<sup>–3</sup> M, with a correlation coefficient of 0.9950 and a detection limit of 2.2 × 10<sup>–7</sup> M (S/N = 3). The modified electrode exhibited excellent selectivity, sensitivity, and a remarkably low detection limit, making it highly suitable for EP determination. Its ease of preparation further adds to the practicality and potential applications of this electrode.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00174-x","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138454643","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

Microfluidic thrombosis analysis system: possibilities and limitations 微流控血栓分析系统:可能性与局限性

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-11-23 DOI: 10.1186/s40486-023-00185-8

Dong-Hwi Ham, Ji-Seob Choi, Jin-Ho Choi, Woo-Tae Park

{"title":"Microfluidic thrombosis analysis system: possibilities and limitations","authors":"Dong-Hwi Ham, Ji-Seob Choi, Jin-Ho Choi, Woo-Tae Park","doi":"10.1186/s40486-023-00185-8","DOIUrl":"10.1186/s40486-023-00185-8","url":null,"abstract":"<div><p>Thrombosis is a double-edged sword. Normal thrombus formation within injured blood vessel is an important natural defensive mechanism to prevent excessive bleeding, whereas abnormal thrombus formation leads to critical disease such as stroke or myocardial infarction. One of keys in the pathophysiology mechanism involved in the thrombus formation is acute hemodynamic changes within the vessel lumen, which has been investigated mostly in pre-clinical and clinical studies. However, studies involving animal or human subjects are frequently limited by technical difficulties and requirement of substantial blood volume. Microfluidic systems have emerged as a valuable tool owing to their inherent advantages including minimal sample requirements and rapid analysis capabilities. In this mini review, we present a summary of microfluidic systems designed for thrombosis analysis, encompassing fabrication processes, design, and analysis methods. We also discuss both the potentials and limitations of microfluidic platform for the analysis of thrombus mechanisms.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00185-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138431627","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

Silicon nanoparticles: fabrication, characterization, application and perspectives 硅纳米颗粒:制备、表征、应用与展望

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-11-23 DOI: 10.1186/s40486-023-00184-9

Taeyeong Kim, Jungchul Lee

引用次数: 0

Plasma dicing before grinding process for highly reliable singulation of low-profile and large die sizes in advanced packages 在研磨前进行等离子切割，可在先进封装中实现低轮廓和大尺寸模具的高可靠性模拟

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-11-18 DOI: 10.1186/s40486-023-00183-w

Keunhoi Kim, Jongcheol Park, Kyoungmin Kim, TaeHyun Kim, SooHyun Kwon, Yeeun Na

{"title":"Plasma dicing before grinding process for highly reliable singulation of low-profile and large die sizes in advanced packages","authors":"Keunhoi Kim, Jongcheol Park, Kyoungmin Kim, TaeHyun Kim, SooHyun Kwon, Yeeun Na","doi":"10.1186/s40486-023-00183-w","DOIUrl":"10.1186/s40486-023-00183-w","url":null,"abstract":"<div><p>The demand for advanced packaging is driven by the need for low-profile, densely-integrated, large-die Si devices in substrate-based or wafer-level packaging. Die strength is a critical parameter for ultrathin dies, making die singulation a vital aspect of advanced packaging technology. In this work, we present a dicing before grinding (DBG) process to compare and analyze die strengths using a mechanical blade, stealth laser, and plasma dicing. The three DBG processes were applied to a 200 mm silicon (Si) wafer process with a die size of 10 × 10 mm<sup>2</sup> and thicknesses of 100, 200, and 300 μm, respectively. Optical and electron microscopes were employed to investigate chipping quality, sidewall damage, and surface contamination. The bare Si die’s strength was assessed using a three-point bending test. Plasma dicing before grinding (PDBG) resulted in less contamination, chipping, and cracking compared to other DBG processes. Furthermore, PDBG exhibited the highest die strength of 1052 Pa.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00183-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138138519","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 and characterization of silicon-on-insulator wafers 绝缘体上硅晶圆的制备与表征

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-11-13 DOI: 10.1186/s40486-023-00181-y

Taeyeong Kim, Jungchul Lee

引用次数: 0

Rheological behavior of 10W40 base oil containing different combinations of MWCNT-Al2O3 nanoparticles and determination of the target nano-lubricant for industrial applications 含不同MWCNT-Al2O3纳米颗粒组合的10W40基础油流变行为及工业应用目标纳米润滑剂的测定

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-10-31 DOI: 10.1186/s40486-023-00179-6

Mohammad Hemmat Esfe, Soheyl Alidoust, Hossein Hatami, Davood Toghraie

{"title":"Rheological behavior of 10W40 base oil containing different combinations of MWCNT-Al2O3 nanoparticles and determination of the target nano-lubricant for industrial applications","authors":"Mohammad Hemmat Esfe, Soheyl Alidoust, Hossein Hatami, Davood Toghraie","doi":"10.1186/s40486-023-00179-6","DOIUrl":"10.1186/s40486-023-00179-6","url":null,"abstract":"<div><p>The main goal of this research is to compare the rheological behavior of hybrid nano lubricants (HNLs) with different composition ratios in a base oil. The purpose of the comparison is to determine the HNL with the best lubrication performance at the start of the vehicle. Theoretical methods have confirmed the non-Newtonian behavior in different laboratory conditions. HNLs with the composition ratio of 30:70 and 25:75 had the highest percentage of increase and decrease in viscosity, respectively 34.97% and − 1.85% at T = 55 °C, shear rate SR = 6665 s<sup>−1</sup> and solid volume fraction SVF = 1% and T = 5 °C, SR = 3999 s<sup>−1</sup> and SVF = 0.05%. To predict the viscosity of the desired HNL, in the RSM, a special model with an accuracy of R<sup>2</sup> = 0.9997 has been used. The margin of deviation (MOD) is determined in the range of − 3.43% < MOD < 4.75%. Viscosity sensitivity analysis shows that the greatest sensitivity will result from SVF changes at high SVFs. The experimental results of this study will introduce the optimal nano polishing to the craftsmen, and the theoretical part of this study will save the researchers from spending time and excessive economic costs.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00179-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797892","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

Designing wearable capacitive pressure sensors with arrangement of porous pyramidal microstructures 多孔锥体结构可穿戴电容式压力传感器的设计

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-10-24 DOI: 10.1186/s40486-023-00178-7

Reza Javidi, Mahdi Moghimi Zand, Sara Alizadeh Majd

{"title":"Designing wearable capacitive pressure sensors with arrangement of porous pyramidal microstructures","authors":"Reza Javidi, Mahdi Moghimi Zand, Sara Alizadeh Majd","doi":"10.1186/s40486-023-00178-7","DOIUrl":"10.1186/s40486-023-00178-7","url":null,"abstract":"<div><p>Capacitive pressure sensors are essential for advanced applications like wearable medical devices, electronic skins, and biological signal detection systems. Enhancing sensitivity in these sensors is achieved by incorporating porous microstructures into the dielectric layer. The present research focuses on designing a capacitive pressure sensor comprising a porous micro-pyramidal dielectric layer featuring diagonally arranged pyramids. The effects of geometric parameters and material properties such as dielectric constant, porosity, base length, tip width, height, and the distance between the pyramidal microstructures were examined using the three-dimensional finite element simulations. A comparative analysis was conducted to evaluate the accuracy of the numerical solution. The simulation results were compared to experimental measurements, and the findings revealed a high level of agreement. The optimal quantity of data for this analysis was determined using the design of the experiment method, specifically the response surface model. The results show that arranging microstructures diagonally or laterally can impact sensitivity and initial capacitance. Specifically, employing a diagonal arrangement enhanced sensor sensitivity by up to 1.65 times while maintaining the initial capacitance relatively unaffected. Ultimately, this study derived mathematical equations from the collected data to estimate the initial capacitance and sensitivity of the sensor. The model predictions were compared to simulation results, and it was found that the models performed effectively.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00178-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134878413","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

Evaluation of stability and functionality of zinc oxide nanofluids for enhanced oil recovery 氧化锌纳米流体提高采收率的稳定性和功能评价

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-10-19 DOI: 10.1186/s40486-023-00180-z

Lengu Peter Tuok, Marwa Elkady, Abdelrahman Zkria, Tsuyoshi Yoshitake, Usama Nour Eldemerdash

{"title":"Evaluation of stability and functionality of zinc oxide nanofluids for enhanced oil recovery","authors":"Lengu Peter Tuok, Marwa Elkady, Abdelrahman Zkria, Tsuyoshi Yoshitake, Usama Nour Eldemerdash","doi":"10.1186/s40486-023-00180-z","DOIUrl":"10.1186/s40486-023-00180-z","url":null,"abstract":"<div><p>Nanofluids for enhanced oil recovery offer a breakthrough solution towards tertiary recovery and consequently higher oil production. Their ability to reduce interfacial tension, alteration of formation’s wettability, higher adsorption capacity, and acceleration of disjoining pressure makes them excellent candidates for enhanced oil recovery. The main objective of this paper is to investigate the effect of polymers on zinc oxide (ZnO) nanofluids for enhanced oil recovery (EOR) and the role played by chemical modification using polymer stabilizers on nanoparticle stability in nanofluids. Nanoparticles with an average particle size of 34 nm were synthesized and used to prepare nanofluids of different concentrations and their stability was evaluated using sedimentation and UV–vis spectrophotometry tests. ZnO-synthesized nanofluids were used solely and in addition to Polyvinylpyrrolidone (PVP) and Polyvinyl alcohol (PVA) as stabilizing agents. It was noted that ZnO nanofluids with PVA stabilizer recorded the highest oil recovery of 82%. In contrast, the ZnO nanofluids without stabilizing agents registered the lowest recovery rate during the flooding experiment. The results revealed that a higher injection rate increases the oil recovery and reduces the viscous fingering effect with a better displacement front. Furthermore, nanofluids containing polymeric stabilizing agents achieved better recovery factors compared to ZnO nanofluids without stabilizing agents. This phenomenon was also observed in the interfacial tension test where nanofluids with PVA and PVP stabilizers reduced the IFT by 59% and 61% respectively.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00180-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134878377","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

Current status and further development of deterministic lateral displacement for micro-particle separation 微颗粒分离的确定性侧向位移研究现状及进一步发展

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-10-04 DOI: 10.1186/s40486-023-00175-w

Alexander Zhbanov, Ye Sung Lee, Sung Yang

{"title":"Current status and further development of deterministic lateral displacement for micro-particle separation","authors":"Alexander Zhbanov, Ye Sung Lee, Sung Yang","doi":"10.1186/s40486-023-00175-w","DOIUrl":"10.1186/s40486-023-00175-w","url":null,"abstract":"<div><p>Deterministic lateral displacement (DLD) is a passive, label-free, continuous-flow method for particle separation. Since its discovery in 2004, it has been widely used in medical tests to separate blood cells, bacteria, extracellular vesicles, DNA, and more. Despite the very simple idea of the DLD method, many details of its mechanism are not yet fully understood and studied. Known analytical equations for the critical diameter of separated particles include only the gap between the columns in the DLD array and the fraction of the column shift. The dependence of the critical diameter on the post diameter, channel height, and a number of other geometric parameters remains unexplored. The problems also include the effect of flow rate and particle concentration on the critical diameter and separation efficiency. At present, DLD devices are mainly developed through numerical simulation and experimental validation. However, it is necessary to find fundamental regularities that would help to improve the separation quantitatively and qualitatively. This review discusses the principle of particle separation, the physical aspects of flow formation, and hydrodynamic forces acting on particles in DLD microchannels. Various analytical models of a viscous flow in an array of cylindrical posts are described. Prospects for further research are outlined.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00175-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134878240","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