Article
Chemistry, Analytical
Francesco Del Giudice
Summary: The rheological characterization of liquids is widely applied in various fields. Traditional rheometers have limitations such as high costs, large sample volumes required, and difficult integration. In contrast, microfluidic devices offer advantages of low cost, small sample volumes required, and easy integration. This review introduces several microfluidic platforms for measuring rheological properties and provides prospects for future works.
Article
Automation & Control Systems
Yugandhar Arcot, G. L. Samuel, Lingxue Kong
Summary: In this study, the manufacturing capability of mechanical micromachining of polymers is explored. It is found that mechanical micromachining is the most suitable method, as it produces surfaces with lower surface energy. Further experiments indicate that polymers machined using mechanical micromachining are suitable for fabricating microfluidic devices.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Review
Otorhinolaryngology
Se Hwan Hwang, Alan M. Gonzalez-Suarez, Gulnaz Stybayeva, Alexander Revzin
Summary: Microfluidic systems offer precise control of liquid volumes for studying human disease mechanisms, drug discovery, personalized medicine, and organ physiology, disease diagnosis, and treatment evaluation in the field of otorhinolaryngology.
CLINICAL AND EXPERIMENTAL OTORHINOLARYNGOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Christian Griesche, Kilian Hoecherl, Antje J. Baeumner
Summary: Laser-induced graphene (LIG) is a desirable electrode material for bio- and chemosensors due to its graphene-like characteristics. The study found that the direct pressure-driven transfer of LIG electrodes onto standard polymer substrates produces highly functional transfer-LIG (tLIG) electrodes which outperformed LIG electrodes in some aspects, especially in more advanced microfluidic channel systems. LIG and tLIG have the potential to change electroanalytical sensing in diagnostic systems with their scalable and easy-to-integrate fabrication process.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Physical
Ju Hwan Kang, Sukyung Choi, Yu Jung Park, Jin Sung Park, Nam Sung Cho, Shinuk Cho, Bright Walker, Dong Soo Choi, Jin-Wook Shin, Jung Hwa Seo
Summary: Cu/graphene hybrid films serve as both p-type and n-type transparent conducting electrodes in organic solar cells, with sheet resistance and work function being significantly improved by controlling the thickness of Cu. The films also exhibit wrinkle features and doubled RMS currents, while devices utilizing Cu/graphene electrodes show much higher power conversion efficiencies compared to those with pristine graphene electrodes.
Article
Chemistry, Multidisciplinary
Merve Buldu-Akturk, Maryam Toufani, Ali Tufani, Emre Erdem
Summary: In this study, reduced graphene oxide/zinc oxide hybrid nanocomposites were prepared and investigated for supercapacitor electrodes. The evolution of intrinsic defects and their effects on the properties of the hybrid nanocomposites were studied using electron paramagnetic resonance spectroscopy. The electrochemical analyses showed improved charge transfer performance and ion diffusion in the rGO electrode with the incorporation of ZnO rich in core defects.
Article
Biochemical Research Methods
Aravind George, Farzan Akbaridoust, Nurul A. Zainal Abidin, Warwick S. Nesbitt, Ivan Marusic
Summary: Hydrodynamic trapping of particles in micro-nano scale applications has provided significant insights. Among non-contact methods, image-based real-time control in cross-slot microfluidic devices shows promise for single cellular assays. Experiments in different channels with varying control delay and magnification achieved sustained trapping of 5 μm diameter particles at high strain rates. The maximum attainable strain rate depends on the control delay and particle resolution, and with further improvements, higher strain rates can be achieved for single cellular assay studies.
Article
Chemistry, Physical
Yuling Zhuo, Eric Prestat, Ian A. Kinloch, Mark A. Bissett
Summary: Two-dimensional materials such as graphene and MoS2 have potential applications in energy storage, but their performance is limited by restacking and poor electrical conductivity. In this study, a true composite electrode was formed by chemically modifying graphene to self-assemble with MoS2, resulting in an alternating layer structure. This composite electrode exhibited improved energy storage properties and stability.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Green & Sustainable Science & Technology
Lanka Tata Rao, Satish Kumar Dubey, Arshad Javed, Sanket Goel
Summary: Laser-induced graphene (LIG) is a three dimensional porous material with excellent properties, and in this study, a low-cost microfluidic fuel cell with LIG electrodes was proposed. By optimizing parameters, the performance of the fuel cell was enhanced.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Chemistry, Analytical
Lauro A. Pradela-Filho, Diele A. G. Araujo, Regina M. Takeuchi, Andre L. Santos, Charles S. Henry
Summary: This study presents a new electrochemical method for tryptamine determination using a paper-based microfluidic device and a thermoplastic electrode (TPE) as a detector. The TPE demonstrated enhanced analytical response and antifouling effect compared to traditional glassy carbon electrodes. These findings suggest promising results for the electrochemical determination of tryptamine using thermoplastic composites.
ANALYTICA CHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
Georg Linz, Sebastian Bernhard Rauer, Lucas Stuewe, Daniel Josef Bell, Markus Rausch, Matthias Wessling
Summary: By depositing silver films on the sidewalls of microfluidic channels, a highly homogeneous electrical field can be achieved in the case of a rectangular channel, overcoming the limitations of conventional electrode integration methods while enabling optical analysis methods.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Engineering, Electrical & Electronic
Mrunali D. Wagh, Subhendu Kumar Sahoo, Sanket Goel
Summary: The research introduces a microfluidic device with integrated microchannel and interdigitated electrodes based on capacitive sensing mechanism manufactured using the laser-induced graphene technique. The device demonstrated linear impedance change for different chemicals in the range of 1-1000 ppm under microfluidic conditions, with a minimum detection limit of 1 ppm. The microfluidic taste sensor has the potential to provide low-cost, simple-to-integrate multi-functional point-of-care sensors for human sensory tastes, clinical, and environmental applications.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Review
Chemistry, Multidisciplinary
Falihah Balqis, Bagas Prakoso, Naufal Hanif Hawari, Calvin Eldona, Afriyanti Sumboja
Summary: This article reviews recent strategies for the structural design and synthesis methods of polyaniline/graphene electrodes in flexible supercapacitors. The article discusses the mechanism and features of flexible supercapacitors, current challenges, and effective strategies. It also provides future perspectives on the broader applications of flexible supercapacitors.
Article
Chemistry, Physical
Oliver Braun, Jan Overbeck, Maria El Abbassi, Silvan Kaser, Roman Furrer, Antonis Olziersky, Alexander Flasby, Gabriela Borin Barin, Qiang Sun, Rimah Darawish, Klaus Muellen, Pascal Ruffieux, Roman Fasel, Ivan Shorubalko, Mickael L. Perrin, Michel Calame
Summary: This study reports a method for integrating atomically precise graphene nanoribbons in a field-effect transistor geometry using graphene electrodes defined by electron beam lithography, which allows for controlled electrode geometries. Thermal annealing is found to be a crucial step for successful device operation, ensuring stable electronic transport characteristics.
Article
Biochemical Research Methods
Florian Gerstl, Uma Pongkitdachoti, Fuangfa Unob, Antje J. Baeumner
Summary: High performance laser-induced graphene (LIG) electrodes were integrated into adhesive tape-based microfluidic channels for electrochemical and electrochemiluminescent detection approaches. This provides low limits of detection, simple hardware requirements, and inexpensive fabrication for point-of-care sensor assays.
Article
Engineering, Electrical & Electronic
C. Harrison Brodie, Jasen Devasagayam, Christopher M. Collier
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2019)
Article
Optics
Isaac Spotts, C. Harrison Brodie, S. Andrew Gadsden, Mohammad Al-Shabi, Christopher M. Collier
Article
Materials Science, Multidisciplinary
C. Harrison Brodie, Isaac Spotts, Hajer Reguigui, Camille A. Leclerc, Michael E. Mitchell, Jonathan F. Holzman, Christopher M. Collier
Summary: The generation of terahertz (THz) radiation has become easier over time. Research and development of THz applications often require THz compatible optical components. Commercially accessible 3D printing systems with high resolution can be used to create novel THz optical components. The properties of the printed component depend on the filament material used. This study characterizes 23 3D printing materials using terahertz time-domain spectroscopy (THz-TDS) to determine their absorptive and refractive properties.
OPTICAL MATERIALS EXPRESS
(2022)
Article
Engineering, Electrical & Electronic
Rahul Eswar, C. Harrison Brodie, Christopher M. Collier
Summary: Antibiotic detection in dairy is crucial for preventing antibiotic resistance and protecting consumer health. The development of a digital microfluidic dairy device shows promise for fast and accurate antibiotic detection.
JOURNAL OF MICROELECTROMECHANICAL SYSTEMS
(2022)
Article
Optics
C. Harrison Brodie, Isaac Spotts, Christopher M. Collier
Summary: This paper presents a 3D printed THz Bragg structure that can filter specific THz frequencies, demonstrating its potential in advancing THz science and technology applications.
Article
Engineering, Electrical & Electronic
Isaac Spotts, C. Harrison Brodie, Daryoosh Saeedkia, S. Andrew Gadsden, Christopher M. Collier
Summary: To improve the performance and integration time of terahertz time-domain spectroscopy (THz-TDS) systems, an adaptive extended Kalman filter (EKF) method is proposed. The method is demonstrated on different THz-TDS setups, improving the maximum measurable absorption coefficient and significantly reducing the acquisition time. The adaptive EKF method maintains correct spectral information and is shown to be adaptable for both vapor and solid samples.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Rahul Eswar, C. Harrison Brodie, Hajer Reguigui, Christopher M. Collier
Summary: Digital microfluidics is utilized in on-site dairy testing to address the challenges of device integration and biofouling. The device developed in this work features a modular and inexpensive design, allowing for reconfiguration and automation. Experimental analyses show that an open system with thin-film dielectric layers is advantageous in reducing and mitigating biofouling.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2023)
Article
Computer Science, Interdisciplinary Applications
Sydney Lepard, Isaac Spotts, C. Harrison Brodie, Camille A. A. Leclerc, Rahul Eswar, Huiyan Li, Christopher M. M. Collier
Summary: This study proposes an advancement to microfluidic optical annealing methods through the application of whispering gallery mode (WGM) with near infrared excitation in a digital microfluidic chip. The use of WGM increases the interaction length between the droplet and light to improve heating and optical absorption, addressing the scaling limitations in optical-based microfluidics. The implementation of this system in an open system digital microfluidic chip shows potential for point-of-care microfluidic devices.
ENGINEERING REPORTS
(2023)
Article
Optics
Isaac Spotts, C. Harrison Brodie, Camille A. Leclerc, S. Andrew Gadsden, Mohammad Al-Shabi, Christopher M. Collier
Summary: There is a fundamental limitation in the implementation of terahertz spectral acquisition due to long experimental acquisition time. This study evaluates the effectiveness of the extended Kalman filter (EKF) and the extended sliding innovation filter (ESIF) in increasing the dynamic range in terahertz spectral acquisition. The results show that both filters can reduce the integration time and achieve similar dynamic ranges.
Article
Computer Science, Information Systems
C. Harrison Brodie, Christopher M. Collier