Article
Chemistry, Physical
Hui Gong, Ang Li, Guoxing Fu, Meiyu Zhang, Zilong Zheng, Qianqian Zhang, Kailing Zhou, Jingbing Liu, Hao Wang
Summary: In this study, a flexible and ultrathin ion-conducting film (ICF) is proposed for electrochromic applications. The ICF exhibits high transmittance, ionic conductivity, electrochemical window, and mechanical flexibility, making it an excellent candidate for flexible electrochromic devices. This work provides a feasible way for assembling high-performance ECDs for potential applications in displays and wearable electronics.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Polymer Science
Wanyu Chen, Siyuan Liu, Le Guo, Guixia Zhang, Heng Zhang, Meng Cao, Lili Wu, Tianxing Xiang, Yong Peng
Summary: An ionic liquid-based ionically cross-linked gel polymer electrolyte (GPE-ILs) was successfully synthesized and used to fabricate high-performance electrochromic devices. The GPE-ILs exhibited good ionic conductivity, thermal stability, and self-healing ability.
Article
Chemistry, Physical
Jingfeng Zheng, Luke Schkeryantz, Gerald Gourdin, Lei Qin, Yiying Wu
Summary: Potassium batteries have attracted considerable attention from researchers, with traditional liquid electrolytes raising safety concerns. A new single potassium-ion conducting polymer, KPSTFSA, was synthesized to address this issue, showing high ionic conductivity and potassium ion transference number compared to traditional electrolytes. The electrochemical stability of the polymer gel electrolyte was studied systematically, revealing the instability of the polystyrene structure of KPSTFSA.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Electrochemistry
H. M. B. I. Gunathilaka, V. A. Seneviratne, H. N. M. Sarangika
Summary: This study aims to prepare and characterize a novel polymer-free gel electrolyte (PFGE) based on fumed silica, and apply it to TiO2 electrochromic devices (ECD). A series of liquid electrolytes with different molar ratios of lithium chloride (LiCl) and ethylene glycol (EG) were prepared, and their ionic conductivities were measured to determine the highest ionic conductivity composition. The optimized composition was used to prepare PFGE by adding fumed silica as the polymer-free gelling agent. ECDs were then prepared by sandwiching PFGE between TiO2 electrochromic electrode and fluorine-doped tin oxide (FTO) counter-electrode, and notable electrochromic properties were observed.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Heejung Roh, Shuwen Yue, Hang Hu, Ke Chen, Heather J. Kulik, Aristide Gumyusenge
Summary: Due to its low-power, fast and highly adaptive operability, as well as scalability, electrochemical random-access memory (ECRAM) technology shows great potential for neuromorphic computing based on artificial neural networks. However, there are still challenges in practical implementation, such as high write noise, asymmetric weight updates, and limited dynamic range. In this study, high-performance, single-transistor and neuromorphic devices based on electrochromic polymers (ECPs) are demonstrated, offering a promising approach for the discovery and design of novel polymer materials for organic ECRAMs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Polymer Science
Carmela Tania Prontera, Nunzia Gallo, Roberto Giannuzzi, Marco Pugliese, Vitantonio Primiceri, Fabrizio Mariano, Antonio Maggiore, Giuseppe Gigli, Alessandro Sannino, Luca Salvatore, Vincenzo Maiorano
Summary: Bio-based polymers have gained significant attention for their potential applications as alternatives to conventional polymers. In the field of electrochemical devices, polymers are being explored as solid-state and gel-based electrolytes to enhance device performance. This study focuses on the fabrication and characterization of collagen membranes for their potential use as a polymeric matrix for gel electrolytes. The cross-linked collagen membranes showed good stability, water absorption capability, and resistance, making them suitable candidates for electrolytes in electrochromic devices.
Review
Materials Science, Multidisciplinary
Tuan Van Nguyen, Quyet Van Le, Shengjie Peng, Zhengfei Dai, Sang Hyun Ahn, Soo Young Kim
Summary: Electrochromism is the ability of a material to change its optical properties or color when an external potential is applied. Conventional electrochromic materials based on inorganic materials have drawbacks including single color change, expensive materials, and slow switching speed. To overcome these challenges, conducting polymers (CPs) have emerged as a promising alternative with advantages of multicolor, fast response, low cost, easy processing, and environmental friendliness. This review introduces the current state-of-the-art development of ECDs based on three popular CPs, namely, polyaniline, polypyrrole, and poly(3,4-ethylenedioxythiophene) polystyrene sulfonate, with emphasis on their synthetic approaches and electrochromic performance.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Polymer Science
Benedict Wen-Cheun Au, Kah-Yoong Chan, Gregory Soon How Thien, Mian-En Yeoh, Mohd Zainizan Sahdan, Hanabe Chowdappa Ananda Murthy
Summary: Over the past few decades, the research on electrochromism has focused on altering the optical transmittance of electrochromic (EC) materials using a small applied voltage. Tungsten oxide (WO3) is commonly used in EC devices (ECDs) to achieve this effect. In this study, WO3 films were produced using a sol-gel spin-coating method, and the influence of various transparent conducting oxides (TCOs) on the construction of ECDs was investigated. The combination of fluorine-doped tin oxide (FTO) and indium-doped tin oxide (ITO) as the TCO and counter electrode, respectively, exhibited the highest coloration efficiency.
Article
Energy & Fuels
Guoqiang Xing, Guoqiang Kuang, Yijie Tao, Yi Wang, Yue Kang, Yafei Guo, Shiguo Zhang
Summary: In this study, a novel composite electrolyte was constructed by adding glass fibers to enhance its mechanical strength. The electrochromic device fabricated with the composite electrolyte showed excellent performance and stability. Moreover, a flexible electrochromic device was successfully assembled, demonstrating remarkable electrochromic behaviors and flexibility.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Chemistry, Multidisciplinary
Robert M. Pankow, Brendan Kerwin, Yongjoon Cho, Seonghun Jeong, Giacomo Forti, Bryan Musolino, Changduk Yang, Antonio Facchetti, Tobin J. Marks
Summary: A detailed investigation on the effects of functionalizing conjugated polymers with oligo(ethylene glycol) (EG(n)) sidechains on the performance and polymer-electrolyte compatibility of electrochromic devices (ECDs) is reported. The incorporation of EG(n) sidechains must be balanced to achieve good compatibility and efficient ion exchange. The characterization of the polymer film morphology/microstructure reveals that an excessive amount of EG(n) sidechains can suppress ion exchange. The identity of sidechain/electrolyte does not influence the electrolyte penetration depth, but EG(n) sidechain inclusion increases electrolyte cation uptake.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Energy & Fuels
Marija Colovic, Metka Hajzeri, Melita Tramsek, Boris Orel, Angelja K. Surca
Summary: The stable function of hybrid electrochromic devices (ECDs) was achieved through the application of quasi-solid-state redox electrolytes with high ionic conductivity and electrochemical stability. Different concentrations of iodine redox electrolytes were tested in hybrid EC devices, all of which showed a trend of increasing brightness during cycling, attributed to the gradual transformation of I-5(-) to I-3(-) and I- species. In situ Raman spectroelectrochemistry provided insight into ECDs during functioning cycles, allowing differentiation of various iodide species.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Multidisciplinary
Merve Icli Ozkut, Ahmet M. Onal, Atilla Cihaner
Summary: This study investigated the electrochemical and electro-optical properties of four different dual electrochromic devices. Soluble donor-acceptor-donor (D-A-D) type conjugated electrochromic polymers based on didecyl substituted 3,4-propylenedioxythiophene and heterodiazole analogs were used in all devices and coated on ITO electrodes. The devices exhibited color changes from green to blue under applied external voltage, and their switching times, coloration efficiencies, and stabilities were evaluated.
Article
Polymer Science
Yuanzheng Mu, Guoqiang Kuang, Cheng Yuan, Lei Wu, Yue Kang, Tian Ma, Yijie Tao, Shiguo Zhang
Summary: In this work, three fused thienothiophene polymers were synthesized using direct arylation polymerization (DArP), which exhibited good electrochromic properties such as high optical contrast, fast switching response, and good stability. A quasi-solid white electrolyte with high reflectivity, ionic conductivity, and mechanical strength was prepared by optimizing the composition. By combining the synthesized polymers and the white electrolyte, three color-to-white electrochromic devices (ECDs) were successfully fabricated, which also showed good electrochromic properties. Color-to-white switching electrochromic devices (ECDs) have great application potential in non-emissive displays and energy-saving fields, and this study provides valuable insights into their development.
Article
Chemistry, Physical
Rui Wang, Lijun Pan, Qiaonan Han, Hongbing Zhu, Meixiu Wan, Yaohua Mai
Summary: The properties of Ta2O5 thin films deposited through DC reactive magnetron sputtering at different working pressures were studied, with the 2.0 Pa Ta2O5 SEL showing the best performance in ATF-ECDs with high optical modulation and fast switch speeds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Polymer Science
M. I. H. Sohaimy, M. I. N. Isa
Summary: In this study, CMC-AFT biopolymer electrolytes system was developed to investigate the effect of AFT on the biopolymer-salt system. The addition of AFT disrupted the crystalline structure of CMC and enhanced the ionic conductivity of the biopolymer electrolytes.
Article
Chemistry, Multidisciplinary
Daniele Marcondes Ferreira, Franciani Cassia Sentanin, Kenia Naara Parra, Victor Millani Negrao Bonini, Mario de Castro, Ana Claudia Kasseboehmer
Summary: The study aimed to implement inquiry-based teaching methods in Brazilian schools and investigate how these activities contribute to enhancing students' intrinsic motivation to learn chemistry.
JOURNAL OF CHEMICAL EDUCATION
(2022)
Article
Education & Educational Research
Franciani Cassia Sentanin, Matheus dos Santos Barbosa da Silva, Rosana F. Martinhao, Kenia Naara Parra, Daniela M. L. Barbato, Ana Claudia Kasseboehmer
Summary: This article explores the design of intrinsically motivating science communication lectures using a museum-based framework, and examines the experience of high school students in Brazil through qualitative and quantitative analysis. The findings suggest that interactive lectures are an important strategic tool for enhancing students' motivation.
INTERNATIONAL JOURNAL OF SCIENCE EDUCATION PART B-COMMUNICATION AND PUBLIC ENGAGEMENT
(2022)
Article
Polymer Science
Rodrigo C. Sabadini, Mariana Fernandes, Veronica de Zea Bermudez, Agnieszka Pawlicka, Maria M. Silva
Summary: The increase in agricultural product demand has complicated the modernization of agriculture. Research advances have improved production systems, but their unsustainable application is a challenge. Hydrogels, as attractive materials, offer potential solutions to this problem in agriculture.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Lada Puntus, Konstantin Lyssenko, Ilya V. Taidakov, Francois Kajzar, Ileana Rau
Summary: The effects of molecules of substituted [2,2]paracyclophane on the field corona poling experiment of thin film of polymethyl methacrylate (PMMA) polymer were investigated. The mutual orientation of different substituents was found to impact the second order non-linear optical susceptibility. The phenyl substituted molecule exhibited the highest susceptibility value of 72.2 +/- 7.2 pm/V at a fundamental wavelength of 1064.2 nm. X-ray structure, absorption spectroscopy, and quantum chemical calculations were employed to discuss the obtained values.
Article
Polymer Science
Cristiana Luminita Gijiu, Raluca Isopescu, Daniel Dinculescu, Maria Memecica, Manuela-Rossemary Apetroaei, Mirela Anton, Verginica Schroder, Ileana Rau
Summary: This study experimentally investigated and optimized the extraction of chitin from crab shells to obtain chitosan with a predefined deacetylation degree and molecular mass. By varying four parameters, including NaOH concentration, temperature, HCl concentration, and number of acidic treatments, the optimum operating conditions were determined. The results showed that a high deacetylation degree of chitosan can be achieved with 5% NaOH concentration and low temperatures, while high molecular mass chitosan can be obtained with a single step acidic treatment.
Article
Chemistry, Multidisciplinary
Franciani Cassia Sentanin, Marcos R. V. Lanza, Ana Claudia Kasseboehmer
Summary: This article reports on the development and analysis of the influence of a chemistry science dissemination video on university students' perception of scientific research, scientific dissemination, and the use of scientific dissemination videos as learning tools. A didactic video of scientific dissemination of a university research in Chemistry was provided as an activity in a distance class. Undergraduates were also asked to produce didactic videos of scientific dissemination related to the topic covered in the classes. The results showed that undergraduates can produce didactic videos of scientific dissemination and that these videos are perceived to propagate the value and importance of scientific dissemination and research carried out in public universities, serving as effective teaching and learning tools.
JOURNAL OF CHEMICAL EDUCATION
(2023)
Article
Biochemistry & Molecular Biology
Willian Robert Caliman, Franciani Cassia Sentanin, Rodrigo Cesar Sabadini, Jose Pedro Donoso, Claudio Jose Magon, Agnieszka Pawlicka
Summary: Nanocomposite polymer electrolytes (NPEs) are prepared using gellan gum (GG) and montmorillonite (Na+SYN-1) clay. These NPEs show high conductivity, good thermal stability, and optical transparency. The coordination environment of Cu2+ ions in the samples is identified using CW-EPR.
Article
Chemistry, Physical
Daniel Dinculescu, Cristiana Luminit Gijiu, Manuela Rossemary Apetroaei, Raluca Isopescu, Ileana Rau, Verginica Schroder
Summary: This study focuses on utilizing waste egg capsules of Rapana venosa as raw material to extract chitosan oligomers, with the aim of optimizing the extraction process. By using experimental design and neural modeling, a maximum yield of 7.05% was achieved with a NaOH concentration of 6.47%, temperature of 90 degrees C, and extraction duration of 120 min.
Article
Materials Science, Multidisciplinary
Willian R. Caliman, Franciani C. Sentanin, Rodrigo C. Sabadini, Rodrigo H. S. Garcia, Tatiana Monaretto, Luiz A. Colnago, Agnieszka Pawlicka
Summary: This paper investigates nanocomposite polymer electrolytes (SPEs) consisting of montmorillonite (MMT; Na+SYN-1) and gellan gum. The characteristics of the membrane samples were analyzed using ATR-FTIR, TD-NMR, and SEM. The results showed an interaction between gellan gum and Na+SYN-1, as well as a more homogeneous surface in the nanocomposite with 40 wt.% Na+SYN-1. The application of NPEs in small electrochromic devices (ECDs) exhibited a decrease in peaks and charge density.
Article
Polymer Science
Katherine Pacheco, Gabriela Aldea-Nunzi, Agnieszka Pawlicka, Jean-Michel Nunzi
Summary: Curcumin, a natural dye found in turmeric, can be used as a photosensitizer in acrylamide-based photopolymers for holographic data storage. Increasing the concentration of curcumin enhances the absorbance, refractive index contrast, sensitivity, and diffraction efficiency of the photopolymer films. Furthermore, the addition of NaOH promotes the efficiency of photopolymerization in the AA-curcumin-based sample.
Article
Chemistry, Physical
Nicolaie Marin, Cristina Orbeci, Liliana Bobirica, Ileana Rau, Calin Deleanu, Elena Iuliana Biru, Paul Octavian Stanescu, Andrei Constantin Berbecaru, Ecaterina Matei, Constantin Bobirica
Summary: Solid activators based on waste glass were synthesized for the manufacture of one-part alkali-activated fly ash/red mud materials. The results showed that the reaction temperature significantly influenced the properties of the solid activators. The best water solubility and compressive strength were achieved for the solid activators synthesized at a temperature of 600 degrees Celsius.
Article
Polymer Science
Adrian Petris, Petronela Gheorghe, Ileana Rau
Summary: This study investigates the influence of DNA-CTMA matrix on the emission of Rhodamine 610 in thin films under 532nm laser illumination at different concentrations.
Article
Multidisciplinary Sciences
Adrian Petris, Petronela Gheorghe, Ileana Rau
Summary: This study reports on the influence of continuous wave laser light at 532 nm on the transmittance and photoluminescence of DNA-CTMA-RhB in butanol compound. The experimental investigation and analysis show the effect of DNA-CTMA on the light-induced process, as well as the temporal dependence of absorption changes induced by the laser light.
Article
Chemistry, Multidisciplinary
Alice Gianina Simonca, Madalina Georgiana Albu Kaya, Ileana Rau, Maria Minodora Marin, Cristina-elena Dinu-pirvu, Alina Lupuliasa, Mihaela Violeta Ghica
Summary: The purpose of this study was to obtain and characterize collagen-based hydrogels with different concentrations of metronidazole and strontium ranelate for periodontal therapy. The structural integrity of the hydrogels was evaluated using circular dichroism, and the release of metronidazole was investigated using an immersion cell adapted to USP 2 apparatus. The results showed that the collagen hydrogels with metronidazole preserved the integrity of the collagen triple helix, while the presence of strontium ranelate caused a structural alteration. The designed collagen-based hydrogels with metronidazole could be beneficial for periodontal disease treatment.
UNIVERSITY POLITEHNICA OF BUCHAREST SCIENTIFIC BULLETIN SERIES B-CHEMISTRY AND MATERIALS SCIENCE
(2023)
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.
