Article
Materials Science, Multidisciplinary
Ulrika Boda, Ioannis Petsagkourakis, Valerio Beni, Peter Andersson Ersman, Klas Tybrandt
Summary: The challenge of high-performance fully printed stretchable OECTs is addressed by developing fully screen-printed stretchable OECTs. Three stretchable functional screen-printing inks are developed, enabling the fabrication of OECTs. The stretchable OECTs show good characteristics and can withstand high strains. An electrochromic smart pixel is demonstrated by connecting a stretchable OECT to a stretchable electrochromic display. The development of screen-printed stretchable electrochemical devices, particularly OECTs, is believed to pave the way for their use in wearable applications and commercial products.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Engineering, Electrical & Electronic
Amirhossein Hassanpoor Kalhori, Woo Soo Kim
Summary: Sensing technology in the Internet-of-Things (IoT) era is crucial for the next industrial revolution. Wireless sensors, particularly those made using printing methods and conductive materials, allow for wireless monitoring of physical and chemical changes in various applications. This article focuses on recent studies exploring advancements in printing methodologies for RF sensing technologies, covering sensor design, mechanisms, performance, and materials, to forecast the future of industry-proven printed wireless RF sensors.
ACS APPLIED ELECTRONIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Sehyun Park, Seunghyeb Ban, Nathan Zavanelli, Andrew E. Bunn, Shinjae Kwon, Hyo-ryoung Lim, Woon-Hong Yeo, Jong-Hoon Kim
Summary: Recent advances in soft materials and nano-microfabrication have made it possible to develop flexible wearable electronics. Printing technologies have shown efficiency and compatibility with polymeric materials for manufacturing wearable electronics. In this study, fully screen-printable, skin-conformal electrodes were presented for low-cost and scalable manufacturing of wearable electronics. The screen printing process enables easy, cost-effective, and high-throughput manufacturing, while the ink used for the conductive layer printing allows for natural deformation under stretching and bending conditions. Real-time wireless electrocardiogram monitoring was successfully demonstrated using the printed electrodes, with an algorithm developed for accurate heart rate and respiratory rate calculations, as well as arrhythmia detection.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Chen Ding, Jiayi Wang, Wei Yuan, Xiaojin Zhou, Yong Lin, Guoqing Zhu, Jie Li, Tao Zhong, Wenming Su, Zheng Cui
Summary: The paper introduces a thermal transfer printing method for fabric electrodes, which overcomes the challenges of manufacturing high-performance fabric electrodes while maintaining the original characteristics of textiles. The fabric electrodes prepared by this method exhibit high conductivity, high adhesion, good abrasion/washing resistance, high patterning resolution, and good electromechanical performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Multidisciplinary
Robert Brooke, Kosala Wijeratne, Kathrin Hubscher, Dagmawi Belaineh, Peter Andersson Ersman
Summary: Large area manufacturing of printed electronic components on A4-sized substrates is achieved using screen printing and vapor phase polymerization. The resulting conductive polymer patterns have high resolution and can be adjusted in thickness. The polymer films produced using this method show improved surface roughness, higher conductivity, and better resolution compared to commercial screen printing ink. Organic electrochemical transistors fabricated through vapor phase polymerization demonstrate excellent performance in terms of switching behavior and amplification factor.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Article
Materials Science, Multidisciplinary
Weiwei Li, Haoran Zhang, Srujana Kagita, Atif Shamim
Summary: This paper introduces a novel screen-printable composite ink for printing dielectric substrates for high frequency electronics with low dielectric loss suitable for mm-wave applications. Moreover, a custom silver nanowires based ink is used for metallic printing to ensure high conductivity and stable electrical response. Through the demonstration of a flexible quasi-Yagi antenna, the material system and printing processes have been confirmed to be suitable for mass production of IoT and wearable electronics.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Chemistry, Analytical
Franck Kimetya Byondi, Youchung Chung
Summary: This paper presents a long-range convex cavity-type passive UHF RFID tag for energy harvesting in IoT sensors, suitable for use on both metal and non-metal surfaces. The tag antenna provides a linear polarized frontal reading range of 35 m and side reading range above 15 m, operating at both 920 MHz and 915 MHz UHF RFID frequencies. The antenna characteristics, structure, modeling, simulation, and experimental results are discussed, with a comparison between mathematical reading range and experimental data.
Article
Green & Sustainable Science & Technology
Anton Nailevich Gafurov, Thanh Huy Phung, Beyong-Hwan Ryu, Inyoung Kim, Taik-Min Lee
Summary: In this research, an artificial intelligence model was developed and integrated with a roll-to-roll screen printing system to detect printing defects. The model achieved a validation mean Intersection over Union (IoU) of 95.1%, demonstrating its potential for reliability assessment in screen printing.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Safoora Khosravi, Saeid Soltanian, Amir Servati, Ali Khademhosseini, Yangzhi Zhu, Peyman Servati
Summary: Wearable sweat biosensors embedded in textile substrates have gained attention for noninvasive monitoring of health parameters. A flexible electrochemical glucose sensor that can be screen-printed onto a textile substrate is demonstrated, achieving a linear response in the range of 20-1000μM of glucose concentration with high sensitivity and stability. These textile-based biosensors show high selectivity towards glucose and have the potential to impact the next generation of wearable devices.
Article
Chemistry, Multidisciplinary
Miquel Moras, Carme Martinez-Domingo, Roger Escude, Cristian Herrojo, Ferran Paredes, Lluis Teres, Ferran Martin, Eloi Ramon
Summary: This paper presents an organic, fully recyclable and eco-friendly 20-bit inkjet-printed chipless RFID tag, which operates in the near field and is implemented using chains of resonant elements. The tag is read by displacing it over a resonator-loaded transmission line and each resonant element is interrogated by a harmonic signal tuned to the resonance frequency.
APPLIED SCIENCES-BASEL
(2021)
Article
Materials Science, Multidisciplinary
Joao H. F. Conceicao, M. Party, D. Curtil, L. Svecova, N. Marlin, N. Reverdy-Bruas
Summary: The progress in electronics technology has led to unsustainable consumption of plastic-based products containing natural finite metallic resources. This study presents a fast and accurate method to measure the amount of metal deposited onto a paper-based substrate, which is crucial for determining the quantity of metal present in end-of-life printed electronics. The results show that acid leaching is the most precise and reliable method for this purpose, overcoming challenges posed by printed pattern geometry and production materials.
FLEXIBLE AND PRINTED ELECTRONICS
(2023)
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
Chemistry, Physical
Shuaishuai Chen, Huaqiang Fu, Yunfa Si, Xueyu Liu, Zhe Wang, Yixue Duan, Zixin Zhang, Hao Feng, Xin Zhao, Daping He
Summary: This study successfully prepared additive-free two-dimensional MXene inks and realized screen-printed MXene wireless electronics for the first time. By tuning the size of MXene nanosheet, the viscosity of MXene ink is regulated without any additives, resulting in highly conductive MXene film with fine printing resolution. RFID tags fabricated using additive-free MXene ink via screen printing exhibit stable antenna reading performance and superb flexibility.
Article
Chemistry, Analytical
Rocio Silvestre, Raul Llinares Llopis, Laura Contat Rodrigo, Victor Serrano Martinez, Josue Ferri, Eduardo Garcia-Breijo
Summary: Flexible hybrid electronics combines flexible-printed substrates with conventional electronics, allowing for the integration of electronic devices on fabrics. This study focuses on optimizing the design parameters for screen-printed silver tracks on textiles and analyzing the soldering of surface mount devices on fabric substrates at low temperatures. The results demonstrate the feasibility of using fabrics for flexible hybrid electronics.
Article
Materials Science, Multidisciplinary
Peter Andersson Ersman, Jerry Eriksson, Darius Jakonis, Sandra Pantzare, Jessica Ahlin, Jan Strandberg, Stefan Sundin, Henrik Toss, Fredrik Ahrentorp, Kaies Daoud, Christian Jonasson, Henrik Svensson, Greger Gregard, Ulf Naslund, Christer Johansson
Summary: This study presents screen printed piezoelectric sensors laminated between glass panes in the temperature range of 80-110 degrees C. The sensors showed no degradation of the piezoelectric signals at 110 degrees C, despite approaching the Curie temperature of the piezoelectric material. The sensors were characterized by monitoring force impact in smart glass applications using a calibrated impact hammer system and standardized impact situations.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Multidisciplinary Sciences
P. Escobedo, M. D. Fernandez-Ramos, N. Lopez-Ruiz, O. Moyano-Rodriguez, A. Martinez-Olmos, I. M. Perez de Vargas-Sansalvador, M. A. Carvajal, L. F. Capitan-Vallvey, A. J. Palma
Summary: This study developed a sensing platform for real-time detection of gaseous CO2 inside FFP2 facemasks. The system combines an opto-chemical sensor with a flexible, battery-less near-field-enabled tag, and includes a smartphone application for wireless powering and data processing. The platform shows potential for non-invasive, wearable health assessment and preclinical research and diagnostics.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Nuria Lopez-Ruiz, Pablo Escobedo, Isidoro Ruiz-Garcia, Miguel A. Carvajal, Alberto J. Palma, Antonio Martinez-Olmos
Summary: This study presents a BCG system for measuring heart rate, breath rate, and activity of a user in bed. The system simplifies the analog and digital processing typically required in these systems while maintaining high performance.
Article
Chemistry, Analytical
Pablo Escobedo, Celia E. Ramos-Lorente, Ammara Ejaz, Miguel M. Erenas, Antonio Martinez-Olmos, Miguel A. Carvajal, Carlos Garcia-Nunez, Ignacio De Orbe-Paya, Luis F. Capitan-Vallvey, Alberto J. Palma
Summary: QRsens is a family of Quick Response (QR) sensing codes designed for in-situ air analysis. It uses a customized smartphone application to read both the QR code and the colorimetric sensors simultaneously. The study presents a built-in multi-sensing platform called QRsens, which can be used for affordable and real-time monitoring in different types of ambient air analysis applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Biophysics
Carmen Martin-Sierra, Mavys Tabraue Chavez, Pablo Escobedo, Victor Garcia-Cabrera, Francisco Javier Lopez-Delgado, Juan Jose Guardia-Monteagudo, Isidoro Ruiz-Garcia, Miguel M. Erenas, Rosario Maria Sanchez-Martin, Luis Fermin Capitan-Vallvey, Alberto J. Palma, Salvatore Pernagallo, Juan Jose Diaz-Mochon
Summary: The COVID-19 pandemic has emphasized the need for innovative diagnostic approaches. CoVradar, a novel colorimetric method, combines nucleic acid analysis, dynamic chemical labeling (DCL) technology, and the Spin-Tube device for detecting SARS-CoV-2 RNA in saliva samples. This method includes a fragmentation step using abasic peptide nucleic acid probes and biotinylated SMART bases for labeling and analysis. Signals are generated through recognition and incubation with a chromogenic substrate, and results are interpreted using CoVreader, a smartphone-based image processing system. CoVradar and CoVreader offer a molecular assay for SARS-CoV-2 RNA detection without the need for extraction or pre-labeling, providing advantages in time, cost, and simplicity.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Analytical
J. A. Moreno-Perez, I. Ruiz-Garcia, P. Martin-Holgado, A. Romero-Maestre, M. Anguiano, R. Vila, M. A. Carvajal
Summary: A commercial pMOS transistor from Vishay (USA) was characterized as a low-energy proton beam dosimeter. The transistor was biased and the silicon temperature was monitored during irradiations. Bias voltages of 0, 1, 5, and 10 V were applied, showing a linearly dependent sensitivity on voltage. The device presented promising characteristics as a dosimeter sensor for proton beams.
Article
Engineering, Electrical & Electronic
A. Pousibet-Garrido, P. Escobedo, D. Guirado, G. S. Ristic, A. J. Palma, M. A. Carvajal
Summary: This paper presents the development, evaluation, and validation of DosiTag, a dosimetric platform based on NFC technology. The system consists of a passive NFC sensing tag as the dosimeter unit and an NFC-enabled smartphone as the reader unit. A cloud service based on MQTT has also been implemented for data storage and classification. The dosimeter tag operates without external power supply, utilizing RF energy from the NFC link. The achieved sensitivity and resolution surpass previous NFC dosimeters, making DosiTag a promising low-cost electronic platform for dose control in radiotherapy.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Chemistry, Analytical
Inmaculada Ortiz-Gomez, Almudena Rivadeneyra, Jose F. Salmeron, Ignacio de Orbe-Paya, Diego P. Morales, Luis Fermin Capitan-Vallvey, Alfonso Salinas-Castillo
Summary: In this study, a microfluidic paper-based analytical device (mu PAD) with an NFC tag was proposed as a portable, simple and fast colorimetric method for glutathione (GSH) determination. The method took advantage of the oxidizing property of Ag+ on 3,3';,5,5'-tetramethylbenzidine (TMB), which resulted in a blue color fading when GSH was present. By integrating electronic interfaces into the hardware of digital image capture, a smartphone was utilized for the colorimetric determination of GSH. Importantly, this new method exhibited a low detection limit of 1.0 mu M, offering high sensitivity and a simple, fast, portable and low-cost GSH determination within 20 minutes using a colorimetric signal.
Article
Chemistry, Analytical
Juan A. Moreno-Perez, Isidoro Ruiz-Garcia, Ismael Navarro-Marchal, Nuria Lopez-Ruiz, Pablo J. Gomez-Lopez, Alberto J. Palma, Miguel A. Carvajal
Summary: This system can measure the flight time and height reached by the user through an Android application, providing monitoring for sports training and injury prevention. The performance tests confirmed the system's potential for monitoring high-level sports training sessions.
Article
Chemistry, Analytical
M. D. Fernandez-Ramos, A. Moraga-Cabezas, Antonio L. Medina-Castillo, L. F. Capitan-Vallvey
Summary: Formaldehyde is a common contaminant that poses health risks in occupational and environmental atmospheres. A colorimetric sensor has been developed to measure the concentration of formaldehyde quickly and accurately. It is portable, sensitive, and suitable for resource-limited settings.
Article
Chemistry, Analytical
Mathews de O. K. Franco, Wilson J. Cardoso, Castelo B. Vilanculo, Vagner B. dos Santos, Joao Paulo B. de Almeida, Luis Fermin Capitan-Vallvey, Willian T. Suarez
Summary: The study introduces a novel and efficient method for simultaneous determination of Cu2+ and furfural in cachaca samples using digital imaging analysis, two-phase system, and chemometrics tools. The method involves reactions between furfural and aniline in an acidic medium forming a pink Schiff base and between Cu2+ and cuprizone in a basic medium forming a blue complex. Partial least squares regression and ordered predictor selection analysis were used to construct prediction models and select the most predictive variables. The developed method showed high accuracy with mean absolute errors of 0.2 mg L-1 for Cu2+ and 0.3 mg per 100 mL of anhydrous alcohol for furfural. This simple method can be easily used by cachaca producers in the manufacturing process.
ANALYTICAL METHODS
(2023)
Article
Chemistry, Analytical
Josiane Lopes de Oliveira, Willian Toito Suarez, Vagner Bezerra dos Santos, Leandro Paulo da Silva, Luis Fermin Capitan-Vallvey
Summary: In this study, a novel cotton thread-based colorimetric sensor modified by carboxymethylcellulose (CMC) and cuprizone (CPZ) with smartphone detection was developed and applied for the quantitative determination of cupric ions in water and cachaca. The method is affordable and low-cost, allowing real-time and on-field determination analyses, especially with limited financial resources. The sensor showed high precision, with a range of quantification from 1 to 12 mg L-1 and a low detection limit of 0.21 mg L-1. The recovery assays in water and cachaca samples resulted in recovery percentages ranging from 84.9% to 107%. The precision of the proposed colorimetric method was validated by comparing the results with that of flame atomic absorption spectrometry and obtaining good agreement at the 95% confidence level.
ANALYTICAL METHODS
(2023)
