Article
Chemistry, Analytical
Philipp Ortner, Maren Umlandt, Nino Lomadze, Svetlana Santer, Marek Bekir
Summary: The quartz crystal microbalance with dissipation (QCM-D) has been widely used for investigating the external stimuli responsiveness at solid-liquid interfaces. However, in light responsive adsorption investigation, the quartz crystal itself reacts to optical stimulation, which poses challenges in data interpretation. This article introduces a simple guideline for correcting the measurement artifacts and minimizing the impact of light induced detuning (LID).
ANALYTICAL CHEMISTRY
(2023)
Article
Polymer Science
Joanna Giermanska, Soumaya Ben Jabrallah, Nicolas Delorme, Guillaume Vignaud, Jean-Paul Chapel
Summary: In this study, the variation of mass density of polymer thin films was investigated, showing an increase for PS and a decrease for PMMA films as thickness was reduced. Additionally, the coefficient of thermal expansion was measured to rationalize the inconsistency with the depression/rise of Tg, revealing a clear correlation between glass transition temperature, coefficient of thermal expansion, and free volume of the polymer.
Article
Chemistry, Multidisciplinary
Chunda Ji, Chao Zhou, Bintao Zhao, Jingfa Yang, Jiang Zhao
Summary: The study explores the impact of counterion binding strength on the swelling of polyelectrolyte brushes, revealing that stronger binding results in less charged main chains and reduced swelling. Investigations into ion identity show a specific order of binding strength for both cationic and anionic chains.
Review
Chemistry, Analytical
Kaimin Wu, Feizhi Kong, Jingjing Zhang, Ying Tang, Yao Chen, Long Chao, Libo Nie, Zhao Huang
Summary: Single-nucleotide polymorphisms (SNPs) are the most common form of genetic variation in the human genome, and are closely related to individual differences. SNP detection with simple preparation and operational procedures, high affinity and specificity, and cost-effectiveness has been a challenge. This review provides an overview on improvements for SNP biosensing based on fluorescent and electrochemical methods, and presents the advantages, disadvantages, and challenges of each method.
Article
Engineering, Electrical & Electronic
Ilia Chiniforooshan Esfahani, Hongwei Sun
Summary: The micropillar-enhanced QCM viscosity measurement device developed in this work achieves ultra-sensitive viscosity measurement of a sample droplet by utilizing the coupled vibration between micropillars and quartz substrate.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Chemistry, Physical
Wael A. Amer, Ahmed F. Rehab, Mona E. Abdelghafar, Nagy L. Torad, Ahmed S. Atlam, Mohamad M. Ayad
Summary: Carbon quantum dots (CQDs) were synthesized using a green and economical hydrothermal method, and their optical and structural properties were studied. The sensing properties of CQDs, particularly towards volatile formaldehyde, were investigated, showing high sensitivity and potential for formaldehyde vapor detection.
Article
Chemistry, Applied
Matthew D. Eaton, Daniel Domene-Lopez, Qifeng Wang, Mercedes G. Montalban, Ignacio Martin-Gullon, Kenneth R. Shull
Summary: The quartz crystal microbalance (QCM) is used as a non-destructive and efficient tool to characterize thin thermoplastic starch (TPS) films, revealing that starch films plasticized with an ionic liquid show superior plasticization and stabilized properties at low humidity compared to those plasticized with glycerol.
CARBOHYDRATE POLYMERS
(2021)
Article
Chemistry, Applied
Muhammad Atif, Kang He, Muhammad Irfan, Yuchen Wang, Fei Hu, Lijuan Chen, Yanmei Wang
Summary: A smart thin stimuli responsive coating based on copolymers was developed to control protein adsorption properties by investigating the effects of pH, ionic strength, and chain length. The experimental observations showed that the coating exhibited switchable ability in response to changes in environmental conditions, and could efficiently adsorb and desorb proteins at different conditions.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Chemistry, Physical
Umit Celik, Kuebra Celik, Ihsan Kehribar, Suleyman Celik, Mehmet Z. Baykara
Summary: Forming a fundamental understanding of tribological processes on the atomic scale has the potential to revolutionize the control of friction and wear in macroscopic mechanical systems. However, current methods for studying tribology at the nanoscale, such as atomic force microscopy, are limited in scanning speed compared to macroscopic mechanical processes. In this study, a new method combining atomic force microscopy with quartz crystal microbalance measurements is proposed for high-speed nanoscale tribology.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Toshinori Shimanouchi, Miki Iwamura, Shintaro Deguchi, Yukitaka Kimura
Summary: The study found that A beta nucleation rates were significantly higher on PSf- and DPPC-based membranes compared to other membranes, with the order of A beta accumulation being PSf > PLLA > DOPC > PMMA, PVP, DPPC, and PEG-PE. Nucleation rates were positively correlated with A beta accumulation (except for the DPPC-based membrane) and negatively correlated with the molecular weight of the polymers.
APPLIED SCIENCES-BASEL
(2021)
Article
Polymer Science
Lucca Trachsel, Shivaprakash N. Ramakrishna, Matteo Romio, Nicholas D. Spencer, Edmondo M. Benetti
Summary: The polymer composition and topology of surface-grafted polyacids play a crucial role in determining the extent of pH-induced swelling transition. Cyclic polymers exhibit enhanced repulsive interactions between charged segments upon deprotonation, leading to amplified expansion compared to their linear analogues. Additionally, the hydration of polyacid grafts is controlled by their composition, affecting the swelling behavior during pH-induced transition.
Article
Engineering, Electrical & Electronic
Zhiqiong Li, Baohui Zhang, Chen Fu, Ran Tao, Honglang Li, Jingting Luo
Summary: MXenes are attractive nanomaterials for humidity-sensitive materials due to their active sites, surface chemistry, and stability. Surface modification of Ti3C2Tx MXene through sulfurization enhances its humidity sensing performance, with the sulfurized MXene QCM sensor exhibiting high humidity sensitivity and ultrafast response and recovery time. It also shows a 20 times higher water absorption ratio compared to the as-synthesized MXene, indicating its potential for high-performance and fast humidity sensors.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
David Toth, Manuel Kasper, Ivan Alic, Mohamed Awadein, Andreas Ebner, Doug Baney, Georg Gramse, Ferry Kienberger
Summary: In this study, a dual electrochemical QCM (dual EC-QCM) is presented for monitoring mass deposition and viscous loading on two crystals simultaneously. A novel correction approach and a three standard complex impedance calibration are employed to overcome the effect of dampening while maintaining high spectral sensitivity. The validation results show potential applications of the method in mass detection with multiple electrodes.
Article
Chemistry, Applied
Seyda Ceylan Comert, Erdogan Ozgur, Lokman Uzun, Mehmet Odabasi
Summary: The study successfully synthesized molecularly imprinted polymer nanofilms on the QCM electrode surface for specific detection of melamine, with characterizations done using various analytical techniques. Results showed that pH 6.0 was optimal for melamine detection, and the prepared MIP QCM electrode exhibited linearity within a certain concentration range, fitting best with the Langmuir-Freundlich hybrid model for adsorption isotherm analysis.
Article
Biochemistry & Molecular Biology
Stellee M. P. Biscaia, Cassiano Pires, Francislaine A. R. Livero, Daniel L. Bellan, Israel Bini, Silvina O. Bustos, Renata O. Vasconcelos, Alexandra Acco, Marcello Iacomini, Elaine R. Carbonero, Martin K. Amstalden, Fabio R. Kubata, Richard D. Cummings, Marcelo Dias-Baruffi, Fernanda F. Simas, Carolina C. Oliveira, Rilton A. Freitas, Celia Regina Cavichiolo Franco, Roger Chammas, Edvaldo S. Trindade
Summary: Melanoma is a highly metastatic and rapidly progressing cancer. The melanoma microenvironment plays a crucial role in drug resistance and tumor recurrence. The study found that MG-Pe can bind to Galectin-3 and has antitumor and antimetastatic effects, especially when used in combination with chemotherapy.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)