Article
Chemistry, Analytical
Na Song, Yue Zhang, Siyu Ren, Ce Wang, Xiaofeng Lu
Summary: The confinement of Fe-0 nanoparticles inside N-doped carbon nanotubes using a wrapping-pyrolysis strategy results in Fe@NC NTs with enhanced peroxidase-like activity. The optimized void structure in the Fe@NC NTs improves the affinity with peroxidase substrates and achieves excellent catalytic efficiency. Additionally, a total antioxidant capacity sensing platform is developed based on this efficient peroxidase-like system.
ANALYTICAL CHEMISTRY
(2022)
Review
Polymer Science
Rudolf Holze
Summary: Intrinsically conducting polymers undergo changes in molecular structure and material properties in highly oxidizing conditions or positive electrode potentials. These changes depend on experimental conditions and chemical environment. While these changes may be beneficial for some applications, they often negatively affect the material's performance.
Article
Multidisciplinary Sciences
Serena Arnaboldi, Gerardo Salinas, Sabrina Bichon, Sebastien Gounel, Nicolas Mano, Alexander Kuhn
Summary: This study introduces an autonomous bi-enzymatic system that utilizes the spontaneous oxidation and reduction of glucose and oxygen to trigger reversible motion. The system operates without the need for any external trigger, relying on the asymmetric uptake and release of ions on a conducting polymer strip that houses glucose oxidase and bilirubin oxidase enzymes. The time-asymmetric consumption of both fuels by the enzymatic reactions leads to the autonomous actuation of the device.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Applied
Fahanwi Asabuwa Ngwabebhoh, Tomas Saha, Jaroslav Stejskal, Miroslava Trchova, Dusan Kopecky, Jiri Pfleger
Summary: Conducting polymers, particularly polypyrrole, were used for surface modification of three different leathers. The polymer was deposited on collagen fibers, forming a thin layer with thickness ranging from 24 to 200 μm. The modified leathers showed changes in mechanical properties and sheet resistances, and their conductivity and electroactivity can potentially be utilized in intelligent leathers for footwear, heating elements, and energy storage.
PROGRESS IN ORGANIC COATINGS
(2023)
Article
Chemistry, Analytical
Matthew S. Ting, Badri Narayanan Narasimhan, Jadranka Travas-Sejdic, Jenny Malmstrom
Summary: Conducting polymer hydrogel composites combine the elastic properties of hydrogels with the redox properties of conducting polymers to achieve out-of-plane actuation with excellent strain performance. The composite material maintains a stable Young's Modulus and exhibits higher actuation performance, potentially applicable in soft actuators, drug delivery, and cell culture studies.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Physics, Applied
Yukihiro Tsugita, Shuichi Maeda
Summary: Conductive inks were developed by combining indium tin oxide (ITO) with polypyrrole. The zeta potentials of the resulting polypyrrole-ITO inks were found to be pH-dependent, with zero zeta potential at pH 5. Thermogravimetric analysis revealed the thermal behavior of ITO and its inks. The conductivities of the inks were measured and compared to the neat polymer, showing excellent conductivity even at low temperatures for LED lighting.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Review
Polymer Science
Nurul Akmaliah Dzulkurnain, Marliyana Mokhtar, Jahwarhar Izuan Abdul Rashid, Victor Feizal Knight, Wan Md Zin Wan Yunus, Keat Khim Ong, Noor Azilah Mohd Kasim, Siti Aminah Mohd Noor
Summary: This review focuses on the application of conducting polymers, particularly Polypyrrole (PPy), in electrochemical sensors. It discusses the theoretical background and applications of impedance and voltammetric analysis in electrochemical detection, as well as the use of PPy as a sensing material. Researchers, especially those without an electrochemical analysis background, are expected to benefit from this easy-to-understand summary of concepts and technologies used in electrochemical sensor research, particularly with PPy as a sensing material.
Article
Nanoscience & Nanotechnology
Jaroslav Stejskal, Irina Sapurina, Jarmila Vilcakova, Tomas Plachy, Michal Sedlacik, Constantin Bubulinca, Marek Goralik, Miroslava Trchova, Zdenka Kolska, Jan Prokes
Summary: The study successfully designed nanostructured hybrid materials that are both conducting and magnetic, which exhibit high conductivity and saturation magnetization, indicating potential applications.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Wendong Zhu, Ya Cheng, Ce Wang, Xiaofeng Lu
Summary: This work demonstrates the fabrication of a hierarchical fiber-in-tube CuFe2O4@conducting polypyrrole (PPy) nanostructure with exceptional peroxidase-like performance. The prepared catalyst shows desirable long-term stability and is used for developing efficient sensors for ascorbic acid (AA) and total antioxidant capacity (TAC) in real samples. This approach offers a new method to construct efficient nanozymes and develop simple TAC assays with potential in biosensing and food technology.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Microbiology
Karla Peraza-Jimenez, Susana De la Rosa-Garcia, Jose Javier Huijara-Vasconselos, Manuela Reyes-Estebanez, Sergio Gomez-Cornelio
Summary: This study collected 1250 fungal isolates from soil, leaf litter, and wood in a humid tropical environment. After enzymatic screening and quantification, several strains with high enzymatic activity were identified, confirming the enzymatic potential of fungi in little-explored tropical rainforests.
Article
Cardiac & Cardiovascular Systems
Weiyu Chen, Sergey Tumanov, Christopher P. Stanley, Stephanie M. Y. Kong, James Nadel, Niv Vigder, Darren L. Newington, Xiao Suo Wang, Louise L. Dunn, Roland Stocker
Summary: This study shows that deficiency of bilirubin is associated with increased risk of atherosclerosis and cardiovascular disease. In the experiments, mice deficient in bilirubin showed higher burden of atherosclerotic plaques, increased systemic oxidative stress, endothelial dysfunction, and hyperlipidemia. Furthermore, the study found that bilirubin deficiency selectively enhanced neutrophil-mediated inflammation and destabilization of unstable plaques.
CIRCULATION RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Jaroslav Stejskal, Irina Sapurina, Jarmila Vilcakova, Petr Humpolicek, Thanh Huong Truong, Mikhail A. Shishov, Miroslava Trchova, Dusan Kopecky, Zdenka Kolska, Jan Prokes, Ivo Krivka
Summary: The article provides a concise overview of recent research progress in the design of macroporous conducting materials, focusing on polypyrrole-coated melamine sponges. It highlights innovative results, suggests future directions, and discusses challenges in the field of macroporous conducting polymer composites. The diverse applications of these materials, along with the experimentation results, demonstrate their broad potential for various fields.
Article
Materials Science, Multidisciplinary
Jaroslav Stejskal, Jarmila Vilcakova, Marek Jurca, Haojie Fei, Miroslava Trchova, Zdenka Kolska, Jan Prokes, Ivo Krivka
Summary: Macroporous melamine sponges were coated with polypyrrole conducting polymer. After high-temperature treatment, both the coating and the sponge were converted to macroporous nitrogen-containing carbons. Changes in molecular structure were observed during carbonization. The specific surface area and porosity of the coated sponge increased, and the conductivity was affected by compression. The coated sponges showed radiation absorption and reflection during shielding tests.
Article
Materials Science, Multidisciplinary
Irina Sapurina, Constantin Bubulinca, Miroslava Trchova, Jan Prokes, Jaroslav Stejskal
Summary: The study focuses on the chemical properties of synthesizing polypyrrole, showing that pure products can be obtained at the appropriate ratio, while higher ratios result in composite materials. In the process of dissolving pyrrole, manganese dioxide consumes protons and generates water, requiring the reaction medium to remain acidic. Adding organic dyes can improve conductivity and result in a one-dimensional morphology during the reaction.
Article
Polymer Science
A. M. R. Ramirez, M. A. del Valle, E. Ortega, F. R. Diaz, M. A. Gacitua
Summary: In this study, electrodes modified with polypyrrole nanowires with a diameter of 30 nm were successfully obtained through electrochemical methods. The analysis of their electrochemical, spectroscopic, and morphological properties revealed that the nanowire structure can significantly enhance the specific capacitance and stability of the capacitors.
Article
Polymer Science
Ryan M. Bouldin, Zhiyu Xia, Thomas J. Klement, Weeradech Kiratitanavit, Ramaswamy Nagarajan
JOURNAL OF APPLIED POLYMER SCIENCE
(2017)
Article
Chemistry, Physical
Akshay Kokil, J. Matthew Chudomel, Boqian Yang, Michael D. Barnes, Paul M. Lahti, Jayant Kumar
Article
Engineering, Electrical & Electronic
Soumitra Satapathi, Akshay Kokil, B. Harihara Venkatraman, Lian Li, Dhandapani Venkataraman, Jayant Kumar
IEEE SENSORS JOURNAL
(2013)
Article
Polymer Science
Ryan M. Bouldin, Akshay Kokil, Timothy Ponrathnam, Nicholas Urban, Jayant Kumar, Lynne A. Samuelson, Ramaswamy Nagarajan
JOURNAL OF APPLIED POLYMER SCIENCE
(2014)
Article
Chemistry, Physical
G. Nagarjuna, Akshay Kokil, Jayant Kumar, D. Venkataraman
JOURNAL OF MATERIALS CHEMISTRY
(2012)
Review
Polymer Science
Akshay Kokil, Ke Yang, Jayant Kumar
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
(2012)
Article
Chemistry, Multidisciplinary
Sethumadhavan Ravichandran, Subhalakshmi Nagarajan, Akshay Kokil, Timothy Ponrathnam, Ryan M. Bouldin, Ferdinando F. Bruno, Lynne Samuelson, Jayant Kumar, Ramaswamy Nagarajan
Article
Chemistry, Organic
Joshna Chittigori, Abhishek Kumar, Lian Li, Sammaiah Thota, Akshay Kokil, Lynne A. Samuelson, Daniel J. Sandman, Jayant Kumar
Article
Chemistry, Multidisciplinary
Akshay Kokil, J. Matthew Chudomel, Paul J. Homnick, Paul M. Lahti, Jayant Kumar
Article
Chemistry, Multidisciplinary
Ryan M. Bouldin, Zoe Folchman-Wagner
JOURNAL OF CHEMICAL EDUCATION
(2019)
Article
Chemistry, Applied
Zarif Farhana Mohd Aris, Ryan M. Bouldin, Margery G. H. Pelletier, Peter Gaines, Bridgette Budhlall, Ramaswamy Nagarajan
CARBOHYDRATE POLYMERS
(2017)
Article
Education & Educational Research
Adam V. Maltese, Joshua A. Danish, Ryan M. Bouldin, Joseph A. Harsh, Branden Bryan
INTERNATIONAL JOURNAL OF RESEARCH & METHOD IN EDUCATION
(2016)
Article
Education & Educational Research
Ryan M. Bouldin, Gregory J. Hall, Eric A. Oches, David W. Szymanski, Fred D. Ledley
Meeting Abstract
Chemistry, Multidisciplinary
Ryan M. Bouldin, Adam V. Maltese
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2013)
Meeting Abstract
Chemistry, Multidisciplinary
Subhalakshmi Nagarajan, Sahana Jayaraman, Sethumadhavan Ravichandran, Ryan Bouldin, Ramaswamy Nagarajan, Jayant Kumar
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2012)
Article
Materials Science, Multidisciplinary
Katerina Skopalova, Itana Nusa Bubanja, Dragomir Stanisavljev, Nikola Cvjeticanin, Vera Kasparkova, Eliska Dad'ova, Erika Pavlikova, Marek Koutny, Marija Gizdavic-Nikolaidis, Petr Humpolicek
Summary: This study compares the biological properties of PANI prepared by different synthesis methods and oxidizing agents, which improves its potential applications in the biomedical field.
Article
Materials Science, Multidisciplinary
Hui-Ping Li, Cai-Yan Gao, Zhi-Ping Chen, Xin-Heng Fan, Lian-Ming Yang
Summary: In this study, a novel type of D-A non-fused-ring copolymers was designed and synthesized to overcome the trade-off relationship between electrical conductivity and Seebeck coefficient in organic semiconductors. The incorporation of fluorine atoms into the polymer backbone effectively increased the ordered degree of molecular stacking and improved both the electrical conductivity and Seebeck coefficient. The bimodal orientation of polymers played a crucial role in decoupling the correlation between electrical conductivity and Seebeck coefficient.
Article
Materials Science, Multidisciplinary
Mansour A. S. Salem, Amjad Mumtaz Khan, Hatem A. M. Saleh, Khalil M. A. Qasem, Mizna Ahmed, Aadil Shafi Bhat, Abdulaziz Abdullah Qasem Ali, Younes S. A. Ghanem, Ali Alrabie, Abdel-Basit Al-Odayni, Waseem Sharaf Saeed, Basheer Al-Anesi
Summary: This research focuses on the versatile substance, polyaniline/layered double hydroxide (PANI@Nd-Co/LDH), under solvothermal conditions. A thorough analysis of its structure and morphology was conducted using various analytical methods. The findings showed that PANI@Nd-Co/LDH exhibited highly sensitive and specific fluorescence detection of Pb(II) and Al(III), outperforming other heavy metal ions. The sensor demonstrated a turn-off fluorescence response for Pb(II) ions and a turn-on fluorescence response for Al(III) ions. The minimum detectable limits (MDL) were determined to be 9.6 nM for Pb(II) and 220 nM for Al(III). PANI@Nd-Co/LDH could be easily regenerated and reused for multiple cycles. The detection mechanisms involved the inner filter effect (IFE) for Pb(II) and the chelation-enhanced fluorescence (CHEF) effect for Al(III). These results highlight the excellent potential of PANI@Nd-Co/LDH in the detection and recognition of Pb(II) and Al(III) ions.