Article
Engineering, Electrical & Electronic
N. Fumeaux, D. Briand
Summary: Transient electronics provide a solution for reducing electronic waste and for use in implantable bioelectronics. We present a scalable method that combines chemical and photonic mechanisms to sinter printed Zn microparticles. The resulting patterns show high electrical conductivity, enabling the fabrication of biodegradable sensors and LC circuits.
NPJ FLEXIBLE ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Georges Dubourg, Marko Radovic, Borislav Vasic
Summary: This study demonstrated that laser processing can effectively reduce the cross-sensitivity to water vapor in ZnO-based sensors printed on paper, enhancing UV sensitivity and paving the way for low-cost and sophisticated paper-based sensors.
Article
Chemistry, Multidisciplinary
Yanbei Hou, Ming Gao, Jingwen Gao, Lihua Zhao, Edwin Hang Tong Teo, Dong Wang, H. Jerry Qi, Kun Zhou
Summary: This study develops flexible and durable wearable sensors using multi jet fusion (MJF) printing technology. The sensors can accurately investigate joint motions in the human body and predict human motions through the collected data using support vector machine. Additionally, the sensors demonstrate excellent performance in monitoring human breath and predicting breath modes, expanding their potential applications in healthcare.
Article
Multidisciplinary Sciences
Muhammad Asif Ali Rehmani, Kartikay Lal, Ayesha Shaukat, Khalid Mahmood Arif
Summary: This work presents a simple method for fabricating capacitive transduction electrodes for sensing applications. The electrodes were produced on a PMMA substrate using a laser engraving machine and characterized by optical microscopy. A functional polymer porous cellulose decorated sensing layer was applied to the geometries for humidity sensing. The resulting sensors exhibited good sensing response with sensitivities ranging from 0.13 to 2.37 pF/%RH. Moreover, by changing the electrode geometry, the sensitivity of the sensors can be increased up to 5 times. The simplicity of the fabrication process and the higher sensitivity offered by the electrode designs make them suitable for various applications, such as air quality sensors and touch or tactile sensors.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Analytical
Zhiyi Zhang, Mickey Chen, Salima Alem, Ye Tao, Ta-Ya Chu, Gaozhi Xiao, Chundra Ramful, Ryan Griffin
Summary: A new type of printed capacitive humidity sensor with stacked parallel-plate electrodes is introduced in this study. The sensor demonstrates high capacitance and sensitivity, enabling detection using low-cost electronic circuits. The use of a polymer sensing material and a grid top electrode design ensures stable performance and rapid response. The study also explores the impact of temperature on the sensor's performance.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Xianhong Zheng, Songlin Zhang, Mengjuan Zhou, Haibo Lu, Shuai Guo, Yaoxin Zhang, Changlong Li, Swee Ching Tan
Summary: Breathable and flexible pressure sensor with nonwoven fabrics as electrodes and sensing layers demonstrate good air permeability and high sensitivity. It can detect full-scale human motion, have fast response time, low detection limit, and superior sensitivity to humidity changes. This sensor shows promise in wearable electronics for body health monitoring, sports activity detection, and disease diagnosis.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Yuan Lin, Bingchang Zhang, Yihao Shi, Yongchao Zheng, Jia Yu, Jiansheng Jie, Xiaohong Zhang
Summary: Silicon-based field effect transistor (FET) sensors with high sensitivity have great potential for detecting chemical/biological species. This study investigates the impact of strain on the field-effect sensing property of silicon wires using humidity sensing as an example. The results show that the humidity sensitivity of FET sensors based on silicon wires increases with tensile strain but decreases with compressive strain. The findings highlight the potential of strain engineering in modulating the field-effect sensing property of Si wires for highly sensitive FET sensors.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Review
Chemistry, Multidisciplinary
Samuel Ahoulou, Etienne Perret, Jean-Marie Nedelec
Summary: Silicon nanowires are attractive materials due to their high surface-to-volume ratio and unique electrical properties, which can be further enhanced by adjusting surface properties with organic/inorganic compounds. This review provides an overview of techniques for modifying silicon nanowire surfaces and characterizing them, highlighting the potential advantages in sensing applications and chipless tag RFID technology. Future opportunities for functionalized silicon nanowires in RFID are also discussed.
Article
Chemistry, Physical
S. Moser, C. Kenel, L. A. Wehner, R. Spolenak, D. C. Dunand
Summary: 3D printing and sintering were used to fabricate porous Si scaffolds for lithium-ion batteries, with a hierarchically-porous architecture created to accommodate volume changes during (dis)charging. The influence of sintering parameters on Si strut porosity and resulting properties was studied, showing that optimal performance is achieved at around -50% Si strut porosity.
JOURNAL OF POWER SOURCES
(2021)
Article
Engineering, Electrical & Electronic
Parveen Kumar, Sumit Kumar, Ashwani Kumar, Vivek Verma
Summary: An easily processed and cost effective method was used to produce highly efficient hydroelectric cells with no toxic byproduct. Structural and morphological analysis of the synthesized samples revealed porous nature and mesoporous size distribution. The dissociation of water molecules and ionic diffusion for electrical energy production were confirmed through dielectric and dc conductivity measurements.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
Yanming Ma, Xinqiang Hu, Shunbo Li, Ye He, Zengzilu Xia, Kaiyong Cai
Summary: In this study, a novel humidity sensor with increased specific surface area was designed. The sensor utilizes a porous PDMS substrate prepared in an economical friendly approach and applies high-quality nano silver wires as the intermediate conductive layer. Graphene oxide is used as the humidity sensitive material. The sensor exhibits a wide range of humidity detection and quick response with high sensitivity.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Engineering, Environmental
Xingzhe Zhang, Duo He, Qiang Yang, Massood Z. Atashbar
Summary: In this study, a new strategy to fabricate humidity sensors based on porous paper was reported. The sensors exhibited high sensitivity, quick response/recovery, high repeatability, and good stability. They were also highly foldable and twistable. Compared to previous humidity sensors, these sensors showed higher sensitivity and unique features, making them suitable for various applications including humidity sensing, breath detection, proximity detection, and non-touch switch.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Hu Peng, Leroy Grob, Lennart Jakob Konstantin Weiss, Lukas Hiendlmeier, Emir Music, Inola Kopic, Tetsuhiko F. Teshima, Philipp Rinklin, Bernhard Wolfrum
Summary: Chip-based impact electrochemistry enables measurement of nanoparticles in solution through detecting their stochastic collisions on polarized microelectrodes. However, the current planar microelectrode array design limits particle detection to the chip surface and doesn't allow detection in 3D environments. In this study, we present a rapid fabrication process for 3D microelectrode arrays by combining ink-jet printing with laser-patterning, enabling particle detection in three dimensions.
Article
Nanoscience & Nanotechnology
J. Li, J. Liu, W. Huo, J. Yu, X. Liu, M. J. Haslinger, M. Muehlberger, P. Kulha, X. Huang
Summary: Biodegradable electronics with the ability to disintegrate and dissolve in liquids have promising applications in healthcare and consumer electronics. Printing technology has the potential to produce complex electronic components with improved yield and throughput. However, achieving a fully printed biodegradable system with complex electronic components is still a challenge. This article summarizes the state-of-the-art techniques in printing biodegradable electronic devices and provides insights into the development of biodegradable inks and pastes suitable for printing. It also discusses the challenges and future trends in printing biodegradable electronics.
MATERIALS TODAY NANO
(2022)
Article
Engineering, Electrical & Electronic
Yumeng Luo, Binlu Yu, Liang Chen, Kwai Hei Li
Summary: A micro humidity sensor based on a GaN chip with silica opal is fabricated, providing a linear relationship, compact size, low cost, high repeatability, and ease of integration and operation.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Nazanin Zanjanizadeh Ezazi, Rubina Ajdary, Alexandra Correia, Ermei Makila, Jamb Salonen, Marianna Kemell, Jouni Hirvonen, Orlando J. Rojas, Heikki J. Ruskoaho, Helder A. Santos
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Engineering, Biomedical
Vimalkumar Balasubramanian, Andrii Domanskyi, Juho-Matti Renko, Mirkka Sarparanta, Chang-Fang Wang, Alexandra Correia, Ermei Makila, Osku S. Alanen, Jarno Salonen, Anu J. Airaksinen, Raimo Tuominen, Jouni Hirvonen, Mikko Airavaara, Helder A. Santos
Article
Engineering, Chemical
Weihua Zhang, Xiaoju Wang, Yongchao Zhang, Bas van Bochove, Ermei Makila, Jukka Seppala, Wenyang Xu, Stefan Willfor, Chunlin Xu
SEPARATION AND PURIFICATION TECHNOLOGY
(2020)
Article
Pharmacology & Pharmacy
Henrika Wickstrom, Rajesh Koppolu, Ermei Makila, Martti Toivakka, Niklas Sandler
Article
Radiology, Nuclear Medicine & Medical Imaging
Ulrika Jakobsson, Ermei Makila, Antti Rahikkala, Surachet Imlimthan, Jarkko Lampuoti, Sanjeev Ranjan, Jouni Heino, Pasi Jalkanen, Ulli Koster, Kenichiro Mizohata, Helder A. Santos, Jarno Salonen, Anu J. Airaksinen, Mirkka Sarparanta, Kerttuli Helariutta
NUCLEAR MEDICINE AND BIOLOGY
(2020)
Article
Engineering, Biomedical
Flavia Fontana, Hanna Lindstedt, Alexandra Correia, Jacopo Chiaro, Otto K. Kari, Joseph Ndika, Harri Alenius, Jonas Buck, Sandro Sieber, Ermei Makila, Jarno Salonen, Arto Urtti, Vincenzo Cerullo, Jouni T. Hirvonen, Helder A. Santos
ADVANCED HEALTHCARE MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Yunzhan Li, Zehua Liu, Li Li, Wenhua Lian, Yaohui He, Elbadry Khalil, Ermei Makila, Wenzhong Zhang, Giulia Torrieri, Xueyan Liu, Jingyi Su, Yuanming Xiu, Flavia Fontana, Jarno Solonen, Jouni Hirvonen, Wen Liu, Hongbo Zhang, Helder A. Santos, Xianming Deng
Article
Pharmacology & Pharmacy
Dave Lumen, Shiqi Wang, Ermei Makila, Surachet Imlimthan, Mirkka Sarparanta, Alexandra Correia, Christina Westerveld Haug, Jouni Hirvonen, Helder A. Santos, Anu J. Airaksinen, Werner Filtvedt, Jarno Salonen
Summary: Porous silicon is a biocompatible and biodegradable material that can be used in biomedical applications. A novel two-step production method for PSi nanoparticles, based on centrifuge chemical vapor deposition and electrochemical post-processing, has been developed for industrial scale production. The physical and biological quality of the cCVD-produced nanoparticles is comparable to those produced conventionally from silicon wafers.
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
(2021)
Article
Materials Science, Biomaterials
Ruoyu Cheng, Shiqi Wang, Karina Moslova, Ermei Maekilae, Jarno Salonen, Jiachen Li, Jouni Hirvonen, Bing Xia, Helder A. Santos
Summary: In this study, we proposed an optimized solution to quantify the functionalization groups on porous silicon (PSi) using nuclear magnetic resonance (NMR) method. By combining hydrolysis with 1H NMR experiments, we successfully optimized the hydrolysis conditions and NMR parameters for quantitative analysis of surficial modification characterization of PSi.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2022)
Article
Chemistry, Physical
Henri Kivela, Mikko Salomaki, Petteri Vainikka, Ermei Makila, Fabrizio Poletti, Stefano Ruggeri, Fabio Terzi, Jukka Lukkari
Summary: Deep eutectic solvents (DESs) formed by hydrogen bond donors and acceptors can be affected by the presence of water, leading to changes in physical properties such as phase separation, viscosity, self-diffusion, and conductivity. Water interferes with the hydrogen bonding network, enhancing ion pair formation. These water-induced changes have both beneficial and potentially negative effects on DESs.
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Chemistry, Applied
Irina L. Simakova, Zuzana Vajglova, Paivi Maki-Arvela, Kari Eranen, Leena Hupa, Markus Peurla, Ermei M. Makila, Johan Warna, Dmitry Yu Murzin
Summary: A one-pot continuous synthesis of menthols from citral was achieved with high selectivity under specific conditions. Catalyst deactivation over time resulted in a decrease in the selectivity to menthols and an increase in the selectivity to isopulegols. A kinetic model was developed to describe the reaction, taking into account both metal and acid site deactivation, and showed good agreement with the experimental data.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2022)
Correction
Chemistry, Physical
Henri Kivela, Mikko Salomaki, Petteri Vainikka, Ermei Makila, Fabrizio Poletti, Stefano Ruggeri, Fabio Terzi, Jukka Lukkari
JOURNAL OF PHYSICAL CHEMISTRY B
(2022)
Article
Materials Science, Multidisciplinary
Lauri Marttila, Mikko Salomaki, Henri Kivela, Jukka Hassinen, Sari Granroth, Ermei Makila, Johan Nyman, Jukka Lukkari
Summary: This study investigates the film formation process of oxidative layer-by-layer multilayers, and shows that polyphosphate (PP) plays a crucial role in the stability and function of the multilayers. Low pH and long deposition times are beneficial for the formation of high-quality redox-active polymer films, while improving the electrical connection to the substrate and increasing film conductivity can make melanin films promising components for biodegradable supercapacitors.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
M. Herzberg, G. Zeng, E. Makila, M. Murtomaa, S. V. Sogaard, J. Garnaes, A. O. Madsen, J. Rantanen
Summary: This study demonstrates how atomic force microscopy (AFM) can be used to measure surface properties of molecular crystals and clarify differences at the crystal surface depending on the dehydration pathway. The results highlight the importance of considering microscale properties when characterizing nanoscale structures at the surface of particulate systems.
Article
Chemistry, Multidisciplinary
Antti Rahikkala, Flavia Fontana, Tomas Bauleth-Ramos, Alexandra Correia, Marianna Kemell, Jani Seitsonen, Ermei Makila, Bruno Sarmento, Jarno Salonen, Janne Ruokolainen, Jouni Hirvonen, Helder A. Santos
