Article
Engineering, Environmental
Yang Li, Cai-Yan Gao, Xin-Heng Fan, Lian-Ming Yang
Summary: This study developed a high-performance polypyrrole (PPy)/single-walled carbon nanotube (SWCNT) composite material through in-situ electrochemical polymerization of pyrrole on a pre-fabricated SWCNT membrane electrode. By adopting pulse galvanostatic electropolymerization (PGEP) technology for interface engineering, the TE performance of the composite film was significantly improved, achieving excellent power factor and figure of merit.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Hamdi Ben Halima, Thibaut Zwingelstein, Vincent Humblot, Boris Lakard, Lydie Viau
Summary: A strategy was developed to prepare antibacterial surfaces by electropolymerization of a pyrrole-functionalized imidazolium ionic liquid bearing a halometallate anion. The antibacterial properties of the monomer [PyC(8)MIm]Br-ZnCl2 were evaluated and the films obtained by incorporation of [PyC(8)MIm]Br-ZnCl2 showed excellent antibacterial properties. The antibacterial activities of the different PPy films were determined both by the halo inhibition method and by the colony forming units (CFUs) counting method over time.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Polymer Science
Doebner Von Tumacder, Zuzana Moravkova, Islam M. Minisy, Jirina Hromadkova, Patrycja Bober
Summary: The study focused on polypyrrole (PPy) prepared with organic dyes for its interesting morphology and electronic properties. It described the preparation of electropolymerized PPy/safranin-O film and found that incorporating safranin-O significantly enhanced the areal capacitance of PPy.
Article
Electrochemistry
A. A. Nekrasov, O. D. Iakobson, O. L. Gribkova
Summary: In this study, in situ Raman spectroelectrochemical investigation was conducted on the electropolymerization of pyrrole in the presence of sulfonated polyelectrolytes. The results showed that the form of polyelectrolyte significantly influenced the chemical structure of the forming PPy-polyelectrolyte complexes, leading to different film properties.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Karolina Glosz, Agnieszka Stolarczyk, Tomasz Jarosz
Summary: Conjugated polymers are commonly used in sensor development but lack selectivity, while molecular imprinting enhances selectivity, particularly in the detection of bioactive substances. This review examines recent advancements in sensors utilizing molecularly imprinted polypyrrole layers, highlighting key deposition methods and analyte types. Trends in the development of these sensors are also explored.
Article
Chemistry, Applied
Sila Melahat Yilmaz, Gulten Atun
Summary: Polypyrrole-azo dye composite coatings were electrodeposited on stainless steel 430 using cyclic voltammetry. The coatings showed enhanced corrosion protection in both NaCl and H2SO4 solutions, with controlled release of the inhibitor deposited in the polypyrrole structure.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Applied
Sila Melahat Yilmaz, Gulten Atun
Summary: In this study, polypyrrole-azo dye composite coatings were electrochemically deposited on stainless steel, exhibiting enhanced corrosion resistance in both saltwater and sulfuric acid media. The optimized protective coating, synthesized with 10-5 M dye, showed superior corrosion protection compared to pure polypyrrole, as confirmed by characterization and analysis.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Chemistry, Physical
Lijun Duan, Qiaojing Wang, Leiting Xiao, Liying Lu, Likun Zang
Summary: An innovative one-pot electrochemical method has been studied for the synthesis of PPy-Cu composite films as the active layer of ReRAM. Cu is uniformly distributed in the films and exhibits two valence states of Cu (0) and Cu (II). The presence of Cu (II) is beneficial for maintaining stable resistive switching performance. The Pt/PPy-Cu/Pt ReRAM device shows excellent memory performance with a low threshold voltage, a long retention time, and good endurance cycles. The resistive switching mechanism is mainly dominated by the Space Charge Limited Current (SCLC) effect accompanied by Schottky emission.
CHEMICAL PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Lesia Piliai, Peter Matvija, Thu Ngan Dinhova, Ivan Khalakhan, Tomas Skala, Zdenek Dolezal, Oleksii Bezkrovnyi, Leszek Kepinski, Mykhailo Vorokhta, Iva Matolinova
Summary: In this study, the metal-substrate interaction and species transformation during CO oxidation on CeO2(111) surface were investigated. It was found that the interaction between gold nanoparticles and peroxo oxygen species formed on ceria step edges resulted in the formation of ionic gold species. Moreover, the addition of O2 led to the rapid growth of Au particles and the formation of large particles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Electrochemistry
Franziska Oberhaus
Summary: Boron trifluoride diethyl etherate is commonly used as solvent for the electropolymerization of conductive polymers, but it has drawbacks of decomposition and low reproducibility. In this study, various catalysts were investigated for the electropolymerization of thiophene and pyrrole, and it was found that the catalysts could significantly reduce the oxidation potential of the monomers. The catalytic effect depended on the electrophilic nature of the catalyst center, influenced by the ligands. The use of appropriate catalysts, such as butyric acid, resulted in conductive films with improved properties.
ELECTROCHIMICA ACTA
(2023)
Article
Materials Science, Multidisciplinary
Kan Tang, Chyanne Turner, Leah Case, Amin Mehrehjedy, Xuyang He, Wujian Miao, Song Guo
Summary: Due to their low operation voltage, high transconductance, and good aqueous compatibility, organic electrochemical transistors (OECTs) have found wide applications in sensing small redox-active molecules. However, selective detection of dopamine can be challenging. To improve the selectivity, a polypyrrole film was electrochemically deposited on the Pt gate electrode and then overoxidized, resulting in an OECT sensor with an overoxidized MIP (o-MIP/Pt) gate. This o-MIP/Pt gate showed similar detection limit as the bare Pt gate, but achieved a good selectivity towards dopamine compared to the interferent ascorbate.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Lingxing Zan, Hatem M. A. Amin, Ehab Mostafa, Abdelaziz A. Abd-El-Latif, Shahid Iqbal, Helmut Baltruschat
Summary: In this study, binder-and carbon-free Co-decorated Ag catalytic nanosheets were synthesized via a simple electrodeposition approach, showing high activity for oxygen reduction reaction and oxygen evolution reaction. The morphology, composition, and structure of the material were characterized using various techniques, and the growth mechanism was investigated. These findings provide insights into the design of efficient oxygen electrocatalysts.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Antonio J. Martinez-Galera, Haojie Guo, Mariano D. Jimenez-Sanchez, Enrique G. Michel, Jose M. Gomez-Rodriguez
Summary: New opportunities for graphene engineering can be achieved by adjusting interfacial interaction in terms of d-band filling and geometry of the support. Growth of graphene on Rh(110) surfaces shows distinct stripe-like moire patterns and Dirac cones around the Fermi level. The analysis also reveals the existence of two levels of interfacial interaction strength and the presence of Dirac cones in band structures of different rotational domains, indicating potential for novel graphene-metal interfaces.
Article
Chemistry, Physical
Li Jin, Changbao Zhao, Zhongmiao Gong, Jiaqi Pan, Wei Wei, Guoqing Wang, Yi Cui
Summary: Hydrogen plays a significant role in the growth of graphene by metal-based chemical vapor deposition, accelerating growth and improving quality. The presence of a certain proportion of hydrogen can promote the growth of graphene by weakening the overlayer-substrate interaction. This study provides insights into the controllable growth of graphene in the presence of hydrogen.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Jeremy Hieulle, Dae-Yong Son, Afshan Jamshaid, Xin Meng, Collin Stecker, Robin Ohmann, Zonghao Liu, Luis K. Ono, Yabing Qi
Summary: Mixing cations in the perovskite structure improves device performance and stability. The atomic structure and electronic properties of Cs(x)MA(1-x)PbBr(3) perovskite interface are revealed, and substitution of MA(+) by Cs+ enhances device stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Analytical
Madis Lusi, Heiki Erikson, Maido Merisalu, Mihkel Rahn, Vaino Sammelselg, Kaido Tammeveski
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2019)
Article
Materials Science, Multidisciplinary
Alexander Vanetsev, Peep Podder, Sebastian Vielhauer, Eduard Feldbach, Jekaterina Kozlova, Vitali Nagirnyi, Hugo Mandar, Ivo Romet, Vaino Sammelselg, Vladimir Makhov, Marco Kirm
Article
Electrochemistry
Reio Praats, Maike Kaarik, Arvo Kikas, Vambola Kisand, Jaan Aruvali, Paarn Paiste, Maido Merisalu, Jaan Leis, Vaino Sammelselg, Jose H. Zagal, Steven Holdcroft, Naotoshi Nakashima, Kaido Tammeveski
ELECTROCHIMICA ACTA
(2020)
Article
Chemistry, Inorganic & Nuclear
V. G. Ilves, S. Y. Sokovnin, M. G. Zuev, M. A. Uimin, D. Privalova, J. Kozlova, V Sammelselg
JOURNAL OF FLUORINE CHEMISTRY
(2020)
Article
Electrochemistry
Madis Lusi, Heiki Erikson, Ave Sarapuu, Maido Merisalu, Mihkel Rahn, Alexey Treshchalov, Paarn Paiste, Maike Kaarik, Jaan Leis, Vaino Sammelselg, Tiit Kaljuvee, Kaido Tammeveski
Article
Electrochemistry
Reio Praats, Maike Kaarik, Arvo Kikas, Vambola Kisand, Jaan Aruvali, Paarn Paiste, Maido Merisalu, Ave Sarapuu, Jaan Leis, Vain Sammelselg, John C. Douglin, Dario R. Dekel, Kaido Tammeveski
Summary: In this study, composite materials based on carbide-derived carbon (CDC) and carbon nanotubes (CNT) modified with Co phthalocyanine (CoPc) were used as electrocatalysts for the oxygen reduction reaction (ORR). By adjusting the ratio of CDC to CNT, composite catalysts with higher CNT content exhibited enhanced ORR electrocatalytic activity. The best-performing catalyst was further tested in an anion exchange membrane fuel cell (AEMFC), showing excellent performance with a peak power density of 473 mW cm(-2).
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2021)
Article
Electrochemistry
Roberta Sibul, Elo Kibena-Poldsepp, Sander Ratso, Mati Kook, Moulay Tahar Sougrati, Maike Kaarik, Maido Merisalu, Jaan Aruvali, Paarn Paiste, Alexey Treshchalov, Jaan Leis, Vambola Kisand, Vaino Sammelselg, Steven Holdcroft, Frederic Jaouen, Kaido Tammeveski
Article
Electrochemistry
Maido Merisalu, Lauri Aarik, Helle-Mai Piirsoo, Jekaterina Kozlova, Aivar Tarre, Roberts Zabels, Johanna Wessing, Abel Brieva, Vaino Sammelselg
Summary: A thin nanostructured corrosion protection coating for Al alloy has been demonstrated, showing excellent corrosion resistance and hardness properties.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Marco P. Oliveira, Ricardo M. Silva, Kiryl A. Yasakau, Alexandre Bastos, Silvar Kallip, Mikhail L. Zheludkevich, Rui F. Silva, Mario G. S. Ferreira
Summary: This study investigated the application of nanometric layers of Al2O3 on aluminium alloy to suppress corrosion. The protective effect weakened over time due to the incorporation of vulnerable hydroxyl species in the film during low-temperature deposition.
Article
Chemistry, Physical
Kefeng Ping, Alan Braschinsky, Mahboob Alam, Rohit Bhadoria, Valdek Mikli, Arvo Mere, Jaan Aruvali, Paarn Paiste, Sergei Vlassov, Mati Kook, Mihkel Rahn, Vaino Sammelselg, Kaido Tammeveski, Nadezda Kongi, Pavel Starkov
ACS APPLIED ENERGY MATERIALS
(2020)
Article
Electrochemistry
M. Oliveira, A. C. Bastos, S. Kallip, T. Hack, M. L. Zheludkevich, M. G. S. Ferreira
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Chemistry, Physical
Sander Ratso, Moulay Tahar Sougrati, Maike Kaarik, Maido Merisalu, Mihkel Rahn, Vambola Kisand, Arvo Kikas, Paarn Paiste, Jaan Leis, Vaino Sammelselg, Frederic Jaouen, Kaido Tammeveski
ACS APPLIED ENERGY MATERIALS
(2019)
Article
Electrochemistry
Sajid Hussain, Heiki Erikson, Nadezda Kongi, Aivar Tarre, Peeter Ritslaid, Mati Kook, Mihkel Rahn, Maido Merisalu, Vaino Sammelselg, Kaido Tammeveski
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2019)
Article
Chemistry, Physical
G. D. Bhowmick, E. Kibena-Poldsepp, L. Matisen, M. Merisalu, M. Kook, M. Kaarik, J. Leis, V. Sammelselg, M. M. Ghangrekar, K. Tammeveski
SUSTAINABLE ENERGY & FUELS
(2019)
Article
Chemistry, Physical
Thamires Canuto de Almeida e Silva, Marek Mooste, Elo Kibena-Poldsepp, Leonard Matisen, Maido Merisalu, Mati Kook, Vaino Sammelselg, Kaido Tammeveski, Michaela Wilhelm, Kurosch Rezwan
CATALYSIS SCIENCE & TECHNOLOGY
(2019)
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.