Micro and Nano Systems Letters最新文献_第5页

Non-fullerene acceptor based photoelectric material for retinal prosthesis 基于非富勒烯受体的视网膜假体光电材料

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-09-28 DOI: 10.1186/s40486-023-00177-8

Hyunsun Song, Hyeonhee Roh, Jae Young Kim, Byung Chul Lee, Bright Walker, Maesoon Im

{"title":"Non-fullerene acceptor based photoelectric material for retinal prosthesis","authors":"Hyunsun Song, Hyeonhee Roh, Jae Young Kim, Byung Chul Lee, Bright Walker, Maesoon Im","doi":"10.1186/s40486-023-00177-8","DOIUrl":"10.1186/s40486-023-00177-8","url":null,"abstract":"<div><p>Microelectronic retinal implants can restore a useful level of artificial vision in photoreceptor-damaged retina. Previously commercialized retinal prostheses require transocular connection lines to an external power supply and/or for data transmission, which are unwieldy and may cause unwanted side effects, such as infections. A recently reported wireless device used a rigid silicon substrate. However, it had the potential for a long-term mechanical mismatch with soft retinal tissue. In this work, we used organic photovoltaic materials which can be fabricated on flexible substrates as well as be operated without any physical connection to the external world. The present study employed PCE10 as an active layer for retinal prosthetic application for the first time. Compared to previously studied organic photovoltaic materials used in retinal prosthesis research (such as P3HT), our PCE10 devices showed higher efficiency, providing a huge advantage in this field. When the PCE10 was blended with other non-fullerene acceptors achieving a ternary organic photovoltaic layer (PCE10:ITIC:Y6 blend), it showed lower reduction of photocurrent under same irradiation frequency condition. The fabrication method for our organic photovoltaic device was simple and easy to control its thickness. The fabricated devices showed adequate photocurrent to stimulate the retinal neurons with a smaller reduction in generated photocurrent during repeating stimuli compared to P3HT or PCE10 alone.Author names: Please confirm if the author names are presented accurately and in the correct sequence (given name, middle name/initial, family name). Author: Given name [Jae Young] Last name [Kim]. Author: Given name [Byung Chul] Last name [Lee].Yes, they are correct.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00177-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797495","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 LIG-based pressure sensors with various silicon-based elastomeric encapsulation layers 不同硅基弹性体封装层的硅基压力传感器研究

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-09-27 DOI: 10.1186/s40486-023-00176-9

Yoo-Kyum Shin, Ki-Hoon Kim, Min-Ho Seo

{"title":"Investigation of LIG-based pressure sensors with various silicon-based elastomeric encapsulation layers","authors":"Yoo-Kyum Shin, Ki-Hoon Kim, Min-Ho Seo","doi":"10.1186/s40486-023-00176-9","DOIUrl":"10.1186/s40486-023-00176-9","url":null,"abstract":"<div><p>Laser-induced graphene (LIG) has attracted significant interest in the field of pressure sensors owing to the high sensitivity associated with its inherent three-dimensional porous structure. However, the brittleness of fabricated LIG poses a critical challenge in terms of durability. To address this issue, current research on LIG-based pressure sensors has focused on the utilization of Si-elastomer encapsulation layers. Despite the importance of the mechanical properties of Si elastomers for the performance of physical sensors, few studies have been conducted on the characterization of pressure sensors based on the encapsulation layer. In this study, we investigated the electromechanical characteristics of LIG-based pressure sensors encapsulated in various Si-based elastomers. For an unbiased evaluation, we first introduce a simple and reliable fabrication process for LIG-based pressure sensors with different Si-elastomer encapsulation layers. Subsequently, the electromechanical responses of the sensors were characterized using an automated pressure machine, demonstrating that sensors with encapsulation layers with a lower Young’s modulus exhibited increased resistance changes and extended response times. Finally, an in-depth exploration of the environmental stability of the pressure sensors was conducted for various encapsulation materials, ultimately confirming negligible performance variations based on the encapsulation materials.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00176-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797784","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

Overcoming delamination in two-photon lithography for improving fabrication of 3D microstructures 克服双光子光刻中分层现象，改善三维微结构的制造

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-09-22 DOI: 10.1186/s40486-023-00173-y

Cheol Woo Ha

{"title":"Overcoming delamination in two-photon lithography for improving fabrication of 3D microstructures","authors":"Cheol Woo Ha","doi":"10.1186/s40486-023-00173-y","DOIUrl":"10.1186/s40486-023-00173-y","url":null,"abstract":"<div><p>Two-photon lithography has emerged as a highly effective method for fabricating intricate three-dimensional (3D) microstructures. It enables the rapid fabrication of 3D microstructures, unlike conventional two-dimensional nanopatterning. Researchers have extensively investigated two-photon polymerization (TPP) for the fabrication of diverse 3D micro/nanodevices with high resolution. TPP can be applied in cell cultures, metamaterials, optical materials, electrical devices, and fluidic devices, to name a few. In this study, we investigate the applications and innovative research pertaining to TPP, which is an effective fabrication technique with significant advancement in various fields. In particular, we attempt to determine the reasons that cause the detachment or delamination of 3D microstructures during the development process and propose some solutions. A step-by-step fabrication process for a glass substrate, from photoresist deposition to laser scanning and the dissolution of the uncured photoresist, is presented. Defects such as pattern delamination are discussed, with emphasis on the cell scaffold structure and microlens array. Understanding and addressing these defects are vital to the success of 3D microstructure fabrication via TPP.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00173-y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134797425","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

Sweat-permeable electronic skin with a pattern of eyes for body temperature monitoring 带有眼睛图案的防汗电子皮肤，用于体温监测

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-09-15 DOI: 10.1186/s40486-023-00170-1

Jeong Hyeon Kim, Daniel J. Joe, Han Eol Lee

{"title":"Sweat-permeable electronic skin with a pattern of eyes for body temperature monitoring","authors":"Jeong Hyeon Kim, Daniel J. Joe, Han Eol Lee","doi":"10.1186/s40486-023-00170-1","DOIUrl":"10.1186/s40486-023-00170-1","url":null,"abstract":"<div><p>Human-machine interface has been considered as a prominent technology for numerous smart applications due to their direct communication between humans and machines. In particular, wearable electronic skins with a free form factor have received a lot of attention due to their excellent adherence to rough and wrinkled surfaces such as human skin and internal organs. However, most of the e-skins reported to date have some disadvantages in terms of mechanical instability and accumulation of by-products at the interface between the human skin and the device. Here, we report a mechanically stable e-skin via a newly designed pattern named the “eyes.” The ingeniously designed pattern of the eyes allowed mechanical stress and strain to be dissipated more effectively than other previously reported patterns. E-skin permeability of by-product was experimentally confirmed through sweat removal tests, showing superior sweat permeability compared to conventional e-skins. Finally, the real-time monitoring of the body temperature was carried out using our resistive-type thermometer in the e-skin.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00170-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796320","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 evaluation of a flexible temperature sensor array using multi-layer ceramic capacitors for spatial temperature mapping 利用多层陶瓷电容器进行空间温度映射的柔性温度传感器阵列的制造与评价

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-09-13 DOI: 10.1186/s40486-023-00172-z

Ji-Sung Yoon, Kwang-Seok Yun

引用次数: 0

Improved recovery of NO2 sensors using heterojunctions between transition metal dichalcogenides and ZnO nanoparticles 利用过渡金属二硫化物和ZnO纳米颗粒之间的异质结提高NO2传感器的回收率

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-09-11 DOI: 10.1186/s40486-023-00171-0

Leilei Wang, Jungwook Choi

引用次数: 0

Hydrophobic surface for direct PEGDA micro-pattern fabrication 用于直接PEGDA微图案制作的疏水表面

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-06-07 DOI: 10.1186/s40486-023-00169-8

Anna Danielak, Juhee Ko, Aminul Islam, David Bue Pedersen, Jungchul Lee

{"title":"Hydrophobic surface for direct PEGDA micro-pattern fabrication","authors":"Anna Danielak, Juhee Ko, Aminul Islam, David Bue Pedersen, Jungchul Lee","doi":"10.1186/s40486-023-00169-8","DOIUrl":"10.1186/s40486-023-00169-8","url":null,"abstract":"<div><p>Photopolymerization of hydrogels films has gained interest in many biomedical and industrial fields. Hydrogel micro-patterns fabricated directly on a device are used as filtering barriers, however, due to weak mechanical properties, these parts require a stable support but deposition of hydrogel in non-polymerized state brings a risk of sinking inside the structure. These limitations can be overcome by applying a hydrophobic surface. This paper presents a novel two-step method, in which a hydrophobic surface was designed and manufactured using mask-projection vat photopolymerization additive manufacturing (VPP). Afterwards, PEGDA-based hydrogel photopolymers were deposited on the surface and a micro-scale patterns were cured. The parts were subjected to water immersion and heating in order to evaluate the swelling and shrinking behaviour of hydrogel. The parts remained stable on the substrate and maintained the properties and the results revealed the shape retention over 97%. This work shows that VPP can be applied in the manufacturing of hydrophobic surfaces for hydrogel photopolymer deposition and curing without sacrificing critical properties.</p><h3>Graphical Abstract</h3>\u0000 <figure><div><div><div><picture><source><img></source></picture></div></div></div></figure>\u0000 </div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00169-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4305878","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

Advancements in visible-light-driven double perovskite nanoparticles for photodegradation 光降解用可见光驱动双钙钛矿纳米颗粒的研究进展

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-05-22 DOI: 10.1186/s40486-023-00168-9

Runia Jana, P. Mary Rajaitha, Sugato Hajra, Hoe Joon Kim

{"title":"Advancements in visible-light-driven double perovskite nanoparticles for photodegradation","authors":"Runia Jana, P. Mary Rajaitha, Sugato Hajra, Hoe Joon Kim","doi":"10.1186/s40486-023-00168-9","DOIUrl":"10.1186/s40486-023-00168-9","url":null,"abstract":"<div><p>Perovskites are of significant interest in the field of photocatalysis. To date, many perovskite nanostructures have been developed, and their applications in photocatalysis have been studied. There has been considerable improvement in the research on metal doping in the perovskite structure to improve their optical and structural properties. This mini-review examines the recent progress in the synthesis of lead-free double perovskite nanoparticles and their application in visible-light photocatalysis. Lead-free perovskites are emerging as an eco-friendly solution in energy, electrochemistry, and sensing. Double perovskites are known for their flexible structural, optical, and morphological properties due to their lattice framework having a general form AAʹBBʹO<sub>6</sub>. They are more useful for hydrogen evolution due to their higher conduction band potential than simple perovskites. Here, we summarize the current progress and provide insights for the future development of double perovskites toward efficient photodegradation.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00168-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4875128","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

Stimuli-responsive polymer-based bioinspired soft robots 刺激反应聚合物仿生软机器人

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-05-08 DOI: 10.1186/s40486-023-00167-w

Swati Panda, Sugato Hajra, P. Mary Rajaitha, Hoe Joon Kim

{"title":"Stimuli-responsive polymer-based bioinspired soft robots","authors":"Swati Panda, Sugato Hajra, P. Mary Rajaitha, Hoe Joon Kim","doi":"10.1186/s40486-023-00167-w","DOIUrl":"10.1186/s40486-023-00167-w","url":null,"abstract":"<div><p>Soft robotics enables various applications in certain environments where conventional rigid robotics cannot deliver the same performance due to their form factor and stiffness. Animals use their soft external organs to carry out activities in response to challenging natural environments efficiently. The objective of soft robots is to provide biologically inspired abilities and enable adaptable and flexible interactions with complex objects and surroundings. Recent advances in stimuli-responsive soft robot technology have heavily used polymer-based multifunctional materials. Soft robots with incredibly sophisticated multi-mechanical, electrical, or optical capabilities have demonstrated the ability to modify their shape intelligently in response to external stimuli, such as light, electricity, thermal gradient, and magnetic fields. This short review covers recent advances in scientific techniques for incorporating multifunctional polymeric materials into stimuli-responsive bioinspired soft robots and their applications. We also discuss how biological inspiration and environmental effects can provide a viable viewpoint for bioinspired design in the innovative field of soft robotics. Lastly, we highlight the future outlooks and prospects for soft, stimuli-responsive, bio-inspired robots.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-023-00167-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4352672","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: 4

3D printing fabrication process for fine control of microneedle shape 3D打印制造工艺对微针形状进行精细控制

IF 3.6

Micro and Nano Systems Letters Pub Date : 2023-01-02 DOI: 10.1186/s40486-022-00165-4

Jinwoong Jeong, Jaeu Park, Sanghoon Lee

{"title":"3D printing fabrication process for fine control of microneedle shape","authors":"Jinwoong Jeong, Jaeu Park, Sanghoon Lee","doi":"10.1186/s40486-022-00165-4","DOIUrl":"10.1186/s40486-022-00165-4","url":null,"abstract":"<div><p>Microneedle electrode (ME) is used to monitor bioelectrical signals by penetrating via the skin, and it compensates for a limitation of surface electrodes. However, existing fabrication of ME have limited in controlling the shape of microneedles, which is directly relevant to the performance and durability of microneedles as an electrode. In this study, a novel method using 3D printing is developed to control needle bevel angles. By controlling the angle of printing direction, needle bevel angles are changed. Various angles of printing direction (0–90°) are investigated to fabricate moldings, and those moldings are used for microneedle fabrications using biocompatible polyimide (PI). The height implementation rate and aspect ratio are also investigated to optimize PI microneedles. The penetration test of the fabricated microneedles is conducted in porcine skin. The PI microneedle of 1000 μm fabricated by the printing angle of 40° showed the bevel angle of 54.5°, which can penetrate the porcine skin. The result demonstrates that this suggested fabrication can be applied using various polymeric materials to optimize microneedle shape.</p></div>","PeriodicalId":704,"journal":{"name":"Micro and Nano Systems Letters","volume":"11 1","pages":""},"PeriodicalIF":3.6,"publicationDate":"2023-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://mnsl-journal.springeropen.com/counter/pdf/10.1186/s40486-022-00165-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4082055","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: 1