Article
Materials Science, Multidisciplinary
Youlim Lee, Sehwan Song, Woochul Lee, Sang-Hee Yoon
Summary: There is an increasing demand for polymer-based electrical leads patterned on polymer substrates of any shape to connect two electrical components. However, electrical leads made of polymer nanocomposites that have high affinity to polymer substrates and outstanding applicability to curved surfaces are still challenging. This necessitates the development of photopatternable and electrically conductive polymer nanocomposites and comprehensive understanding of their constituent and processes involved in their development.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Miguel Cabello, Inmaculada Dominguez, Clara Macias, Francisco Perdigones, Carmen Aracil, Jose M. Quero
Summary: This paper presents a procedure to release SU-8 layers from glass substrates using typical undesirable effects, successfully fabricating a glass/gold microelectrodes array (MEA) for cell culture applications. The method takes advantage of thermal delamination and UV overexposure effects, demonstrating successful biological experiments with neuroblastoma cells on the MEA.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Deginet Admassu, Tejumade Durowade, Wei Gao, Silviu Velicu, Sivalingam Sivananthan
Summary: This study explores the adhesive wafer bonding of micro-actuators using SU-8 photoresist and how factors such as bonding temperature, pressure, baking time, and photoresist thickness affect the bonding strength. It was found that decreasing exposure dose and post-exposure baking temperature can enhance the bonding strength between micro-chips by inhibiting hardening and promoting softening of the photoresist layer.
MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Seyed Hossein Hosseini Biuki, Majid Badieirostami, Mahmoud Shahabadi
Summary: To demonstrate radiative cooling, a structure must have high reflectivity (above 90%) in the wavelength range of 0.3 to 3 mu m and high emissivity (for wavelengths ranging from 8 to 13 mu m) in the atmospheric transparency window. Inspired by microwave absorbers, a novel microstructure with close to unity emissivity is proposed for radiative cooling. The V-grooved multilayer periodic microstructure designed and analyzed shows excellent emissivity in the desired wavelength range, and SU-8 is selected as the suitable material for its fabrication.
IEEE PHOTONICS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Zhongyuan Li, Jinlong He, Ashwanth Subramanian, Nikhil Tiwale, Keith J. Dusoe, Chang -Yong Nam, Ying Li, Seok-Woo Lee
Summary: In this study, core-shell SU-8 nanocomposites fabricated via vapor-phase infiltration of nanoscale amorphous aluminum oxides showed an ultrahigh modulus of resilience much higher than most high-strength materials. The unique microstructural features, including the low aspect ratio of aluminum oxide nanoparticles, the larger particle size compared to the free volume size, and the thin interconnecting links within the particles, contribute to the exceptional combination of low specific Young's modulus and high specific yield strength, resulting in a specific modulus of resilience about ten times higher than materials with similar yield strength. The vapor-phase infiltration method demonstrated excellent capabilities in producing polymer nanocomposites that can absorb and release large amounts of elastic strain energy.
MATERIALS & DESIGN
(2023)
Article
Materials Science, Multidisciplinary
Yuchen Shao, Yuan'an Zhao, Hao Ma, Cheng Li, Dawei Li, Jianda Shao
Summary: The study shows that solvent content has an impact on the feature size of polymerization in multi-photon polymerization. Adjusting the solvent content can refine the polymer size, as low solvent content restricts the mobility of photon-induced H+ cations, leading to a reduction in polymer diameter.
Article
Polymer Science
Marius Pustan, Corina Birleanu, Rodica Voicu, Raluca Muller
Summary: This study investigates the effect of temperature on the mechanical and tribological properties of SU-8 polymer. The results show that increasing temperature leads to a decrease in the modulus of elasticity and hardness, while increasing the adhesion and friction forces. Additionally, hard baking at high temperature increases the modulus of elasticity and hardness, and decreases the adhesion and friction forces of the polymer.
Article
Computer Science, Information Systems
M. B. Jaafar, M. B. Othman, M. M. I. Megat Hasnan, H. Haroon
Summary: This study introduces the capability of the AgSiN/SU-8 layer on the silver-based SPR structure for water content detection in stingless bee honey. The results show that the AgSiN/SU-8 layer can protect the silver surface from erosion and minimize the formation of silver oxide.
Article
Chemistry, Physical
Chuanlong Guan, Jinkui Chu, Ran Zhang
Summary: The interfacial properties of the resist/mold in UV-NIL have a significant impact on the surface morphology of nanopatterns. Increasing crosslinking conversion leads to decreased interfacial energy but higher stress during interfacial separation. Introducing a traction-separation description can better simulate the stress distribution at the interface. Appropriately reducing the crosslinking conversion can limit the interfacial stress and maintain the desired morphology.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Yan-Jun Huang, Wen-Huei Chang, Yi-Jui Chen, Chun-Hung Lin
Summary: The paper introduces a simple and cost-effective method for creating metal/SU-8 nanocomposites by applying a metal precursor drop onto the surface or nanostructure of SU-8 and exposing it to UV light. No pre-mixing or pre-synthesis of metal nanoparticles is required. TEM analysis confirms the composition and depth distribution of silver nanoparticles in the nanocomposites. The antibacterial properties of the nanocomposites are evaluated. Additionally, composite surfaces with customized colors and spectra are produced using gold and silver precursors.
Article
Chemistry, Physical
George H. Major, Sean C. Chapman, Jeffrey T. Chapman, Joshua I. Wheeler, Shiladitya Chatterjee, Cody V. Cushman, Daniel H. Ess, Matthew R. Linford
Summary: SU-8 is an important, epoxy-based, negative photoresist that can create high aspect ratio features. Spectroscopic ellipsometry (SE) is a nondestructive analytical technique that can be performed in the open air. In this study, different models were used to fit the SE measurement data of SU-8, with the B-spline model showing the lowest mean squared error. Additionally, time-dependent density functional theory (TD-DFT) modeling was found to be consistent with the measured optical function of SU-8.
SURFACE AND INTERFACE ANALYSIS
(2021)
Article
Chemistry, Physical
Su Yeon Lee, Jee Na Lee, Kiramage Chathuranga, Jong Soo Lee, Won Ho Park
Summary: Researchers have successfully achieved strong adhesion in wet environments by mimicking the adhesion mechanism of marine organisms. Results from the experiments show that hydrogels with gallol groups perform better than those with catechol groups, indicating that gallol-functionalized hydrogels have great potential as multifunctional adhesives.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Jongmoon Jang, Giulia Panusa, Giovanni Boero, Juergen Brugger
Summary: Glass-like carbon (GC) is a novel material with a combination of various properties, including high hardness, low density, low thermal conductivity, high chemical inertness, biocompatibility, high electrical conductivity. Although its application in mechanical sensors has not been explored, our research reveals its potential in electromechanical microdevices.
MICROSYSTEMS & NANOENGINEERING
(2022)
Review
Chemistry, Analytical
Ziyu Chen, Jeong-Bong Lee
Summary: SU-8, an epoxy-based negative-tone photoresist, has been widely used in fabricating biomedical devices. Despite its not complete biocompatibility, existing surface modification techniques can minimize biofouling. With proper treatments and surface modifications, SU-8 can be a unique choice for biomedical device fabrication.
Article
Chemistry, Multidisciplinary
Carla Fernandez-Rico, Jeffrey S. Urbach, Roel P. A. Dullens
Summary: Surface roughness plays a key role in determining mechanical properties, wettability, and self-assembly in colloidal systems. This study introduces a simple and fast method for producing rough colloidal SU-8 particles, controlling the size and density of asperities through nanoprecipitation reactions. Fluorescent labeling of the rough particles allows for confocal imaging and demonstrates their stability at high packing fractions, providing a valuable model system for studying the impact of surface roughness on materials composed of anisotropic particles.
Article
Chemistry, Physical
George H. Major, Vincent Fernandez, Neal Fairley, Matthew R. Linford
Summary: The Gaussian-Lorentzian sum (GLS) and product (GLP) functions are important in X-ray photoelectron spectroscopy (XPS) peak fitting, and were compared with the Voigt function. The study found that the GLS is a linear combination of Gaussian and Lorentzian functions, while one component of GLP can be extremely wide. The areas of GLS, GLP, and LA(m) functions exhibit linear and nonlinear changes with the mixing parameter m, with GLS and GLP showing better matches to LA(m) function at lower and higher m values.
SURFACE AND INTERFACE ANALYSIS
(2022)
Article
Chemistry, Analytical
Dhananjay I. Patel, George H. Major, Collin Jacobsen, Dhruv Shah, Brian R. Strohmeier, Daniel Shollenberger, David S. Bell, Morris D. Argyle, Matthew R. Linford
Summary: In this study, a new atmospheric pressure-atomic layer deposition system was developed for coating the inner walls of capillary columns used in gas chromatography. Unlike traditional ALD, this system operates at near-atmospheric pressure and addresses the challenges of thin film deposition inside capillaries. The researchers successfully deposited pinhole-free, uniform alumina thin films in the capillaries using the new system.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Mahsa Tamandani, Sayyed Hossein Hashemi, Massoud Kaykhaii, Ahmad Jamali Keikha, Ali Nasiriyan
Summary: In this study, a molecularly imprinted polymer (MIP) was synthesized and used as a sorbent for solid phase extraction of profenofos insecticide in seawater, rice, and fish samples. Spectrophotometry was employed for quantitation. The optimized method showed good analytical features, simplicity of operation, and no requirement for expensive solvents.
Review
Chemistry, Analytical
Mona Sargazi, Massoud Kaykhaii
Summary: Magnetic covalent organic frameworks are emerging materials with unique applications in analytical chemistry. They have special morphology, stability, high adsorption capacity, good magnetic response, etc. Studies show their potential in extraction and pre-concentration of organic compounds, heavy metal ions, and biological samples. They can also be used as adsorbents in chemical analysis and sensors.
CRITICAL REVIEWS IN ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Patrycja Janicka, Justyna Plotka-Wasylka, Natalia Jatkowska, Aneta Chabowska, Michel Y. Fares, Vasil Andruch, Massoud Kaykhaii, Jacek Gebicki
Summary: This review discusses the changes and importance of environmental friendliness in analytical chemistry under the concept of sustainable development. Sample preparation is identified as a key bottleneck in following green protocols, and improving its environmental friendliness is explored through miniaturized sample preparation methods and the application of green solvents.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2022)
Article
Chemistry, Physical
Patrycja Makos-Chelstowska, Massoud Kaykhaii, Justyna Plotka-Wasylka, Miguel de la Guardia
Summary: Magnetic deep eutectic solvents (MDES) are a new subclass of solvents that exhibit a strong response to external magnetic fields. They have been widely used to improve industrial and analytical applications. MDES have unique physicochemical properties that can be easily adjusted by selecting appropriate ingredients. This review provides an overview of the structures, synthesis methods, basic properties, and current applications of MDES. It also discusses the advantages, limitations, and future perspectives of MDES applications.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Correction
Materials Science, Coatings & Films
George H. Major, Neal Fairley, Peter M. A. Sherwood, Matthew R. Linford, Jeff Terry, Vincent Fernandez, Kateryna Artyushkova
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Article
Engineering, Environmental
Mehdi Shahraki, Mohammad Reza Rezaei Kahkha, Jamshid Piri, Abbas Sharafi, Massoud Kaykhaii
Summary: This study reports on the amount and characteristics of airborne microplastics pollution in dust samples in Sistan, eastern Iran. The study found that residential and non-residential areas had a distribution frequency of 6 to 11 pieces per 100 grams, with polyethylene, polystyrene, and polyester being the main microplastics present. Population density and wind direction were identified as the most important factors affecting microplastics pollution in dust.
JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
(2022)
Article
Materials Science, Coatings & Films
George H. Major, Vincent Fernandez, Neal Fairley, Emily F. Smith, Matthew R. Linford
Summary: Peak fitting of X-ray photoelectron spectroscopy (XPS) data is crucial for identifying and quantifying the chemical states of atoms near the sample surface. Optimal peak fitting requires the peak shape to best match the physics and chemistry of the data. Constraints are often necessary to obtain good fits, preventing unphysical or unchemical results.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2022)
Review
Engineering, Chemical
Massoud Kaykhaii, Zhila Honarmandrad, Jacek Gebicki
Summary: Hydrogen production from biomass and organic wastes is an alternative, clean energy source. The presence of microplastics in biomass affects the yield of hydrogen, with both the number and size of plastic particles playing important roles. This Review examines the effects of various microplastics on biohydrogen production.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Sayyed Hossein Hashemi, Massoud Kaykhaii, Ahmad Jamali Keikha, Leila Raisi
Summary: This paper introduces a new microextraction method called deep eutectic solvent stir bar sorptive extraction (DES-SBSE) that uses a hydrophobic DES (hDES) as a coating for SBSE. Vitamin D-3 was efficiently extracted from different real samples using this technique and spectrophotometrically determined. The parameters affecting microextraction were studied and optimized using various methods. Under the optimal conditions, the method achieved a detection limit of 0.08 μg/L. The linear range of the method was 0.5 to 1000.0 μg/L for the analyte. The method showed good precision for intraday repeatability and interday reproducibility, with values better than 3.1 and 4.2, respectively. A single stir bar could be used for at least 50 successive extractions, and the batch-to-batch reproducibility of SB coated with hDES was 4.5%.
Article
Environmental Sciences
Reza Samsami, Neda Zalpour, Massoud Kaykhaii
Summary: The aim of this study was to evaluate the effectiveness of the combined peroxy-acid/O-3 treatment method for degrading polycyclic aromatic hydrocarbons (PAHs) in aged soil. The study compared the efficiency of slurry phase ozonation and peroxy-acid treatment methods. The results showed that the peroxy-acid/O-3 combined system was more effective, removing over 71% of total PAHs, while slurry phase ozonation and peroxy-acid treatment had lower efficiencies of 46% and 48%, respectively.
WATER AIR AND SOIL POLLUTION
(2023)
Review
Chemistry, Multidisciplinary
Zhila Honarmandrad, Massoud Kaykhaii, Jacek Gebicki
Summary: This paper provides an overview of recent research on the applications of metal-organic frameworks (MOFs) for removing microplastics (MPs) from aqueous environments. MOFs have unique properties that make them promising for this purpose, such as high surface area, renewability, chemical stability, and versatility. It has been shown that MOFs can effectively adsorb MPs from water, with removal rates ranging from 70-99.9%. However, the high cost and potential instability of MOFs in their powder form are major limitations.
Article
Chemistry, Multidisciplinary
Saida Kaykhaii, Davod Mohebbi-Kalhori, Massoud Kaykhaii
Summary: In this study, a laminar pulsatile fluid flow was used to separate benzene, toluene, ethylbenzene, and xylene isomers (BTEX) from aqueous solutions. Polyether sulfone hollow fiber membrane was applied in this process. The results showed that applying a pulsatile fluid flow with a frequency of 0.5 Hz significantly improved the separation process, with the removal efficiency increasing more than twice. Additionally, the BTEX separation under the pulsatile fluid flow was influenced by the feed flow rate, extraction flow rate, and BTEX concentration.
IRANIAN JOURNAL OF CHEMISTRY & CHEMICAL ENGINEERING-INTERNATIONAL ENGLISH EDITION
(2022)
Review
Chemistry, Multidisciplinary
Patrycja Janicka, Massoud Kaykhaii, Justyna Plotka-Wasylka, Jacek Gebicki
Summary: In recent years, the development of green and sustainable technologies has gained momentum due to increasing awareness of the harmfulness of chemicals to the environment. Supramolecular deep eutectic solvents (SUPRADESs) are a new subclass of solvents that possess inclusion properties, allowing for selective binding of various chemical compounds. Combining the environmentally friendly properties of deep eutectic solvents (DESs) with cyclodextrins, SUPRADESs have the potential to revolutionize the field of green chemistry.
