Article
Chemistry, Multidisciplinary
Qiqi Niu, Zhaoxia Dong, Qichao Lv, Fengfan Zhang, Hao Shen, Zihao Yang, Meiqin Lin, Juan Zhang, Kang Xiao
Summary: CO2 enhanced oil recovery with viscoelastic surfactant-stabilized foam shows excellent stability and foam performance. The aggregation and adsorption behavior of the surfactant are affected by temperature and salt concentration.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Chemistry, Physical
Jinpeng Zhang, Hongye Li, Linyu Xue, Xiaomei Pei, Zhenggang Cui, Binglei Song
Summary: In this study, a novel rosin-based quaternary ammonium surfactant was synthesized to form thread-like aggregates with rigidity. The solution showed remarkable viscoelasticity at very low surfactant concentrations and exhibited excellent shear resistance and weak sensitivity to temperature.
Article
Engineering, Chemical
Li-Jen Lin, Mukesh Saini, Chung-Jen Chiang, Yun-Peng Chao
Summary: In this study, a whole cell biocatalysis system was used to produce short-chain alcohols from fatty acids. Escherichia coli strain was reprogrammed to improve biocatalytic activity, resulting in successful production of 1-propanol and n-pentanol.
Article
Biophysics
Songcheng Xu, Min Gu, Kun Wu, Guoying Li
Summary: The study found that different alcohols affect collagen differently, with longer carbon chain lengths promoting denaturation and aggregation, while an increased number of hydroxyl groups enhances thermal stability and dispersal. Alcohols can alter the hydration layer structure around collagen, thereby impacting the aggregation morphology of collagen molecules in solution.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Chemistry, Physical
Lingyun Song, Ruiguo Wang, Kaikai Niu, Yuxiu Liu, Junjie Kou, Hongjian Song, Jingjing Zhang, Qingmin Wang
Summary: Fluorinated surfactants have excellent surface activity but raise environmental concerns. This study developed a series of novel environmentally friendly fluorinated surfactants, showing that under certain conditions, short-fluorocarbon-chain surfactants can outperform long-fluorocarbon-chain surfactants by adjusting the ratio of hydrophilic and hydrophobic monomers.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Youjie Sheng, Menghua Xue, Yubo Wang, Xudong Zhai, Shanwen Zhang, Qiuhong Wang, Li Ma, Xuhan Ding, Xiangrong Liu
Summary: The study systematically investigated the properties of aqueous foam containing a mixture of nanoparticles and surfactants, showing that the addition of nanoparticles has a slight effect on foam properties and a significant impact on foam stability. Additionally, the foam stability can be further enhanced by increasing the concentration of nanoparticles.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Tian Zhang, Haopeng Chen, Chuanfu Li, Kun Lu, Liting Zhang, Ahmad Shokrieh, Jianqi Zhang, Guanghao Lu, Shengbin Lei, Zhixiang Wei
Summary: The introduction of trifluoro alkyl side chains to the pyrrole unit of the BTP core can optimize the morphology of NFA-based OSCs and improve their performance.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Chemistry, Physical
Feng Zhu, Runxu Deng, Shaoqi Li
Summary: This study evaluated the aggregation behavior of a surfactant in deep eutectic solvents (DESs) and its effects on the electrochemical behavior of copper ions. The results showed that increasing the concentration of the surfactant led to an increase in the viscosity of the DES and a decrease in its ionic conductivity. The rate of the oxidation-reduction reactions of copper ions was also influenced by the surfactant concentration. Additionally, the aggregation of the surfactant near the critical micelle concentration played an important role in controlling the morphology of copper.
Article
Chemistry, Physical
Yuan Zhou, Xiuquan Yang, Liang Bai, Zhiyu Wu, Jun Zhang, Ziyu Qin, Jiamin Fan
Summary: The phase behaviors and formation mechanism of a surfactant aqueous two-phase system (ATPS) composed of a nonionic surfactant and an anionic surfactant were studied. The results showed that the top phase was enriched with the nonionic surfactant, while the bottom phase was enriched with the anionic surfactant. The micelle aggregation behaviors were explored using various measurements, and the formation mechanism of the ATPS was proposed.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Polymer Science
Jianjian Jiao, Chi Ma, Linlin Zhang, Fan Li, Tianxu Gao, Lei Wang, Lee Tin Sin
Summary: A hexameric quaternary ammonium salt surfactant with a rigid triazine spacer and six ammonium groups (Tz-6C(12)QC) was synthesized. The self-assembly behavior of Tz-6C(12)QC at different concentrations and its effects on the rheological behavior of the polyacrylamide system were investigated. The results showed that Tz-6C(12)QC exhibited excellent surface activity and had the ability to reduce the viscosity of polyacrylamide. The study also revealed the different structures formed by Tz-6C(12)QC at varying concentrations.
Article
Chemistry, Analytical
Philip J. Brahana, Ahmed Al Harraq, Luis E. Saab, Ruby Roberg, Kaillat T. Valsaraj, Bhuvnesh Bharti
Summary: Microplastics and PFAS are significant emerging contaminants in the environment, with microplastics having a high potential to adsorb PFAS due to their surface area-to-volume ratio. PFCAs, a sub-class of PFAS, are often studied alongside other environmental pollutants without considering their amphiphilic properties. This study investigates the interaction between PFCAs and polyethylene microplastics, revealing that the fluoroalkyl tail of PFCAs plays a role in their binding to microplastics. Additionally, environmental weathering can modify this interaction by releasing PFCAs from plastic surfaces after sunlight exposure.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2023)
Article
Biochemistry & Molecular Biology
Javed Masood Khan, Ajamaluddin Malik, Prerna Sharma, Sadaf Fatima
Summary: In this study, the impact of the negatively charged detergent sodium dodecyl sulfate (SDS) on insulin amyloid fibrillation was investigated. It was found that SDS can accelerate insulin aggregation at pH 2.0, but not at pH 7.4.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Artem Bezrukov, Yury Galyametdinov
Summary: The aim of this study is to understand and optimize the formation of polyelectrolyte-surfactant complexes in microfluidic confinement. By analyzing a system of governing equations, the factors influencing the reaction initiation, product distribution, and phase behavior are identified and experimentally verified. This approach allows for the design of microfluidic devices with improved control over the complexation reaction and the production of aggregates with a broader size range and reduced dispersity.
Article
Biochemistry & Molecular Biology
Javed Masood Khan, Ajamaluddin Malik, Sundus Mohammed Alresaini
Summary: Protein aggregation and amyloid fibrillation are associated with neurodegenerative disorders. This study investigated the effects of CTAB on the aggregation process of insulin at pH 7.4 and 2.0. The results showed that low concentrations of CTAB induced insulin aggregation at pH 7.4, but higher concentrations did not. However, at pH 2.0, both low and high concentrations of CTAB were unable to promote insulin aggregation.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Chemistry, Physical
Shiho Yada, Yuiko Yoshioka, Masashi Ohno, Toshinari Koda, Tomokazu Yoshimura
Summary: Homogeneous polyoxyethylene (EO) alkyl ether-and ester-type nonionic surfactants with multi-branched double chains were synthesized and their adsorption and aggregation properties were investigated. Results showed that the surface tension could be considerably reduced by using multi-branched methyl groups with low surface energy as the hydrophobic groups.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Biochemistry & Molecular Biology
Nadia Manganaro, Roberto Zagami, Mariachiara Trapani, Maria Angela Castriciano, Andrea Romeo, Luigi Monsu Scolaro
Summary: Under moderate acidic conditions, cobalt complexes ions play an efficient role in promoting the self-assembling process of porphyrin molecules into J-aggregates, with the amino complex being more active than the phen complex. Growth kinetics analysis reveals the existence of nucleus formation and evolving rate constants during the aggregation process.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Raymond Gillibert, Alessandro Magazzu, Agnese Callegari, David Bronte-Ciriza, Antonino Foti, Maria Grazia Donato, Onofrio M. Marago, Giovanni Volpe, Marc Lamy de la Chapelle, Fabienne Lagarde, Pietro G. Gucciardi
Summary: Tire and road wear particles (TRWP) are non-exhaust particulate matter generated by road transport means during mechanical abrasion, and can be precisely captured and chemically analyzed in liquid environment using Raman tweezers, revealing the sub-micrometric pollution particles produced during the wear of car tires and brakes.
ENVIRONMENTAL SCIENCE-NANO
(2022)
Article
Chemistry, Physical
Antonino Mazzaglia, Giuseppe Di Natale, Rita Tosto, Angela Scala, Giuseppe Sortino, Anna Piperno, Maria Pia Casaletto, Alberto Riminucci, Maria Laura Giuffrida, Placido G. Mineo, Valentina Villari, Norberto Micali, Giuseppe Pappalardo
Summary: The study demonstrates that KLVFF-decorated nanomagnets show good selectivity for extracting AB (1-42) peptide effectively from aqueous samples. The nanoassemblies exhibit stable size and surface properties in aqueous dispersion. These nanohybrids have potential applications as diagnostic tools.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
I Pisagatti, D. Crisafulli, A. Pappalardo, G. Trusso Sfrazzetto, A. Notti, F. Nastasi, M. F. Parisi, N. Micali, G. Gattuso, V. Villari
Summary: A pillar[5]arene was synthesized and found to form a host-guest complex with a viologen derivative, resulting in the quenching of fluorescence intensity through a photoinduced electron transfer process.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Valentina Villari, Massimiliano Gaeta, Alessandro D'Urso, Norberto Micali
Summary: The functionalization of carbon dots with dyes through supramolecular interactions can provide desired optical properties. In this study, supramolecular complexes formed spontaneously in water medium between an anionic meso-tetrakis(4-sulfonatophenyl) porphyrin and three different fluorescent carbon nanodots were investigated. The results showed that the formation of porphyrin/carbon dot adducts is favored by high surface charge of the nanodots, and the resulting emission properties depend on the surface precursor. These nanomaterials show fluorescence quenching, making them potential candidates for energy conversion or sensor applications.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Astronomy & Astrophysics
A. Magazzu, D. Bronte Ciriza, A. Musolino, A. Saidi, P. Polimeno, M. G. Donato, A. Foti, P. G. Gucciardi, M. A. Iati, R. Saija, N. Perchiazzi, A. Rotundi, L. Folco, O. M. Marago
Summary: Cosmic dust is crucial in the formation of stars and planetary systems, as it serves as the foundation for the creation of molecular hydrogen and simple organic compounds. Through noninvasive techniques such as optical and Raman tweezers, we are able to manipulate individual dust particles in a water solution to determine their response to optical forces and torques, as well as their mineral composition. Additionally, our accurate calculations using the T-matrix formalism emphasize the role of composition and complex morphology in the optical trapping of cosmic dust particles, presenting potential applications in curation facilities for sample-return missions or extraterrestrial environments.
ASTROPHYSICAL JOURNAL
(2023)
Article
Electrochemistry
Rayhane Zribi, Antonino Foti, Maria G. Donato, Pietro G. Gucciardi, Giovanni Neri
Summary: In this paper, layered molybdenum disulfide (2D-MoS2) nanosheets of different size and number of layers were prepared via liquid cascade centrifugation (LCC) and their electrochemical characteristics for the detection of dopamine and riboflavin were investigated. The results showed that the electrochemical properties of 2D-MoS2 nanosheets can be tuned by modifying their geometric features. The study proposes LCC as a promising technique for preparing nanomaterials with enhanced performances for developing electrochemical sensors for biomolecules.
ELECTROCHIMICA ACTA
(2022)
Editorial Material
Biochemistry & Molecular Biology
Valentina Villari
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Balkis Abdelaziz, Mariachiara Sara, Sahbi Ayachi, Roberto Zagami, Salvatore Patane, Andrea Romeo, Maria Angela Castriciano, Luigi Monsu Scolaro
Summary: The highly distorted octabromo-4-sulfonatophenyl porphyrin readily forms J-aggregates in acidic solution, exhibiting a bathochromic shift and tilted structure; computational analysis reveals the effect of protonation on conformation and stability of the diacid species; experimental observations show the globular shape of J-aggregates.
Article
Chemistry, Organic
Chiara M. A. Gangemi, Maria A. Castriciano, Ester D'Agostino, Andrea Romeo, Paola M. Bonaccorsi, Anna Barattucci, Luigi Monsu Scolaro
Summary: A new amphiphilic monosubstituted porphyrin functionalized by a β-D-glucoside terminated oligophenylenethylene has been synthesized and found to self-arrange into nano-aggregates in polar solvents. Emissive rod-like nano-aggregates were obtained in both fluid and solid phases.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2023)
Proceedings Paper
Optics
Silvie Bernatova, Martin Kizovsky, Maria G. Donato, Antonino Foti, Ota Samek, Jan Jezek, Onofrio M. Marago, Pavel Zemanek, Pietro G. Gucciardi
Summary: Optical nano-printing enables the printing of various nanoparticles into arbitrary configurations, utilizing optical forces to push the particles onto a substrate. It can be used to create a sensitive sensor, called an active aggregate, for detecting low concentrations of dyes or plastic nanoparticles.
22ND POLISH-SLOVAK-CZECH OPTICAL CONFERENCE ON WAVE AND QUANTUM ASPECTS OF CONTEMPORARY OPTICS
(2022)
Proceedings Paper
Engineering, Ocean
Silvie Bernatova, Martin Kizovsky, Maria Grazia Donato, Antonino Foti, Pavel Zemanek, Ota Samek, Onofrio M. Marago, Jan Jezek, Pietro G. Gucciardi
Summary: This article reports a new optical method for detecting the presence of nanoplastics by using optical aggregation. By utilizing the optical nanoimprinting of plasmonic metal nanoparticles, the detection sensitivity for nanoparticles and molecules can be enhanced.
2022 IEEE INTERNATIONAL WORKSHOP ON METROLOGY FOR THE SEA LEARNING TO MEASURE SEA HEALTH PARAMETERS (METROSEA)
(2022)