Article
Engineering, Chemical
Zheng Chen, Mingrui Liao, Lizhi Zhang, Jian Zhou
Summary: Zwitterionic materials show strong hydration and underwater oleophobicity, with optimal performance when the carbon spacer length is 3. The addition of NaCl can enhance the properties by weakening self-association of molecules.
Article
Thermodynamics
Zi-Jie Wang, Shao-Yu Wang, Dan-Qi Wang, Yan-Ru Yang, Xiao-Dong Wang, Duu-Jong Lee
Summary: This study investigates the nucleation and departure processes on a binary mixed substrate using molecular dynamics simulation and finds that clusters tend to form on areas with enriched hydrophilic atoms, affecting droplet removal efficiency. A probability analysis shows that a ratio of 25% provides optimal nucleation properties with minimal deterioration in departure properties.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Chemistry, Multidisciplinary
Dennis Meier, Abhishek K. Adak, Peter Knecht, Joachim Reichert, Sourav Mondal, Nithin Suryadevara, Senthil Kumar Kuppusamy, Keitaro Eguchi, Matthias K. Muntwiler, Francesco Allegretti, Mario Ruben, Johannes V. Barth, Shobhana Narasimhan, Anthoula C. Papageorgiou
Summary: Tailored nano-spaces can control enantioselective adsorption and molecular motion through the spontaneous assembly of a dynamic system on Ag(111) using 2,6-bis(1H-pyrazol-1-yl)pyridine-4-carboxylic acid. The network cavity snugly hosts the chemically modified guest, bestows enantiomorphic adsorption, and allows selective rotational motions. Hydrogen bonding plays a crucial role in stabilizing the rotating guest and influencing the energy landscape formation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Angelo Tricase, Davide Blasi, Alessandro Favia, Angela Stefanachi, Francesco Leonetti, Giuseppe Colafemmina, Luisa Torsi, Gaetano Scamarcio
Summary: The study investigated the synthesis of self-assembled monolayers of NMPA on Au films using infrared spectroscopy and found that the reaction yield was significantly influenced by the acidity of the EDC/NHSS solutions.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Samuel E. Hoff, Desire Di Silvio, Ronald F. Ziolo, Sergio E. Moya, Hendrik Heinz
Summary: Functionalization of nanoparticles with specific ligands can control specific diagnostic and therapeutic responses. This study uses molecular dynamics simulations to investigate self-assembled monolayers of multisegment ligands on gold nanoparticles, showing that they can mimic mixed hydrophobic and hydrophilic ligand coatings, with control over patterns, hydrophilicity, and specific recognition properties.
Article
Thermodynamics
Rongkun Pan, Daimin Hu, Xuefeng Han, Jiangkun Chao, Hailin Jia
Summary: The wetting and exothermic properties of preoxidized coal and its effect on coal spontaneous combustion (CSC) were studied using molecular dynamics simulations, microcalorimetry, scanning electron microscopy (SEM), and fourier transform infrared spectrometer (FTIR). The experimental results showed that preoxidation treatment increased the porosity and hydrophilic groups of coal, leading to an increase in wetting heat and intensifying the risk of CSC. These findings provide important theoretical basis for the prevention of CSC.
Article
Electrochemistry
Jie Shi, Feng Jiang, Shichuan Long, Zhixing Lu, Tianshuo Liu, Haining Zheng, Jia Shi, Yang Yang, Wenjing Hong, Zhong-Qun Tian
Summary: Eutectic Gallium-Indium (EGaIn) is a promising technique for fabricating self-assembled monolayers (SAMs)-based molecular devices, but previous measurements revealed abnormal signals, such as offset zero-bias current. A new automatic instrument platform was built to systematically study the electrical behavior of SAMs, showing that ambient water affects charge transport through molecular junctions and can cause offset of zero-bias current.
ELECTROCHIMICA ACTA
(2021)
Article
Acoustics
Wendi Li, Yuxin Liang, Bangsheng Li, Jicai Feng
Summary: This paper investigates the sonoprocessing of droplet spreading during the wetting process of molten aluminum droplets on SiC ceramic substrates at 700 C. The study finds that the wettability of the liquid metal is enhanced when wetting is assisted by a 20 kHz frequency ultrasonic field. The wetting kinetics are divided into two stages based on the pinning and depinning states of the substrate/droplet contact lines. The use of ultrasonic treatment leads to changes in the oxide films and the formation of a precursor film, resulting in a decrease in the contact angle. The numerical evaluation of thermodynamic variables provides an explanation for the fast-decreasing contact angle.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Gyu Don Kong, Hyunsun Song, Seungmin Yoon, Hungu Kang, Rakwoo Chang, Hyo Jae Yoon
Summary: Interstitially mixed self-assembled monolayers (imSAMs) remarkably enhance the electrical stability of molecular-scale electronic devices without deteriorating function and reliability. This is achieved through the new approach of repeated surface exchange of molecules (ReSEM), filling the interstices between matrix molecules with reinforcement molecules to significantly enhance breakdown voltage.
Article
Chemistry, Multidisciplinary
Ruttapol Malatong, Takuro Sato, Jakkapan Kumsampao, Taketoshi Minato, Masayuki Suda, Vinich Promarak, Hiroshi M. Yamamoto
Summary: This study addresses the challenges of spin controllability, durability, and spin-polarization efficiency in chiral-induced spin selectivity (CISS) by developing a self-assembled monolayer (SAM) of overcrowded alkene (OCA)-based molecular motor. It is demonstrated that the direction of spin polarization can be externally and repeatedly manipulated by switching the molecular chirality, and a higher stereo-ordering architecture of the SAM of OCAs enhances the efficiency of spin polarization. These findings provide a credible feasibility study for the development of CISS-based spintronic devices.
Article
Nanoscience & Nanotechnology
Yangbiao Liu, Egbert Zojer, Michael Zharnikov
Summary: Self-assembled monolayers (SAMs) of ferrocene-substituted thiofluorene on Au(111) exhibit two distinct conductance states (CSs) with high rectification ratio (RR). The CSs and RR depend on the bias voltage sweep direction, with the high CS preserved under negative bias and switched to low CS under positive bias. In symmetric sweeps, the CS depends on the polarity of the first sweep.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Zhenqing Wang, Pengyu Wang, Hang Song, Zhong Chen
Summary: This study aims to investigate the wetting behavior of nanoparticle droplets on vertically vibrating surfaces and examine the effects of volume fraction and hydrophilicity. The results demonstrate that the contact states of nanofluids with the substrate can be altered by changing the vibration amplitude while keeping the period constant. The volume fraction has a greater impact on the dynamic wetting behavior of the droplets compared to the hydrophilicity of nanoparticles, and the influence of volume fraction and hydrophilicity is concentrated in the initial stage of vibration.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Review
Chemistry, Multidisciplinary
Hira Khalid, Lixian Tian, Xi Yu, Irshad Hussain, Wenping Hu
Summary: This review summarizes the preparation, characterization, structure modulation, and applications of mixed self-assembled monolayers (mixed SAMs) in molecular electronics. The ability to tune the intermolecular interactions and optimize charge transport in desired devices is a key advantage of SAM-based molecular devices compared to single molecular devices. The qualitative and quantitative examination of the nanoscale organization and intermolecular interactions of mixed SAMs obtained by various techniques is reviewed. The challenges of using mixed SAMs for the development of novel electronic functional devices in the future are also discussed.
Article
Chemistry, Multidisciplinary
Yuan Li, Dandan Wang, Wuxian Peng, Li Jiang, Xiaojiang Yu, Damien Thompson, Christian A. Nijhuis
Summary: This paper describes large positive cooperative effects in the tunneling rates across molecular junctions of mixed self-assembled monolayers (SAMs). By gradually diluting one type of molecule in the mixed SAM, it was found that the cooperative effect is only significant in the coherent tunneling regime. Density functional theory (DFT) analysis showed that these cooperative effects are caused by Fc-X van der Waals interactions, with varying strengths depending on the X group. These strong cooperative effects significantly alter the operation of a molecular diode, highlighting the importance of considering cooperative effects, driven by van der Waals interactions, in the rational design of electronic devices working at the tunneling regime.
Article
Polymer Science
Zhao-yang Zhang, Tao Li
Summary: Molecular-scale electronics is an emerging research field that aims to achieve electronic functions using single molecules and their monolayer assemblies. Advances in fabricating SAM devices and optimizing their performance can lead to practical applications in molecular electronics. Conjugated polymers show distinct advantages in SAM devices, outperforming small molecular materials in optoelectronic functions such as on-off ratios for switches.
ACTA POLYMERICA SINICA
(2021)
Article
Thermodynamics
Dapeng Liu, Binod R. Giri, Milan Szori, Bela Viskolcz, Et-touhami Es-sebbar, Aamir Farooq
Summary: The study focused on measuring the absolute rate coefficients for the redox reaction between allyl radical (C3H5) and NOx, showing strong positive temperature dependence but no pressure dependence. This high-temperature measurement of allyl + NOx reactions provides valuable insights into the interaction of NOx with resonantly stabilized radicals and its effect on hydrocarbon fuels.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Thermodynamics
Dapeng Liu, Binod Raj Giri, Milan Szori, Bela Viskolcz, Lam K. Huynh, Aamir Farooq
Summary: The study investigated the hydrogen abstraction reactions of 1,3- and 1,4-cyclohexadienes by OH radicals, revealing similar reactivity towards OH radicals at high temperatures with weak positive temperature dependence. The measured rate coefficients provide valuable data for improving the performance of oxidation kinetic models of C-6 cyclic hydrocarbons.
PROCEEDINGS OF THE COMBUSTION INSTITUTE
(2021)
Article
Biochemistry & Molecular Biology
Miklos Nagy, Bela Fiser, Milan Szori, Laszlo Vanyorek, Bela Viskolcz
Summary: Isocyanoaminoarenes are a versatile group of fluorophores with potential applications in various fields. This paper presents the preparation and optical study of a novel isocyano derivative and its variations. The conversion of one amino group into an isocyano group greatly enhanced the polar character of the dyes, resulting in improved solvatochromism and reduced fluorescence in polar solvents.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Chemistry, Physical
Barbara Honti, Milan Szori, Pal Jedlovszky
Summary: This study investigates the adsorption behavior of benzonitrile on the surfaces of crystalline and low-density amorphous ice through simulations. It is found that benzonitrile can only form a highly unsaturated monolayer on low-density amorphous ice and hardly adsorbs on crystalline ice. Despite the weak adsorption ability, the estimated heat of adsorption at an infinitely low surface concentration is rather large.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Physical
Binod R. Giri, Aamir Farooq, Milan Szori, John M. Roscoe
Summary: This work presents the temperature dependence of the rate coefficients for the reactions between atomic bromine and xylenes. The experiments were conducted at various oxygen concentrations to assess its role in the reactions and compare the results with previous studies. The rate coefficients were found to be independent of the oxygen concentration and the temperature dependence was determined. Theoretical calculations revealed that the reactions proceed through a complex forming mechanism.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Polymer Science
Hadeer Q. Waleed, Marcell Csecsi, Rachid Hadjadj, Ravikumar Thangaraj, Daniel Pecsmany, Michael Owen, Milan Szori, Zsolt Fejes, Bela Viskolcz, Bela Fiser
Summary: This study examines the catalytic effect of eight different nitrogen-containing catalysts on urethane formation and proposes a mechanism for urethane formation. The results demonstrate the significant impact of these catalysts on urethane formation. These findings have implications for catalyst design and development in the future.
Article
Chemistry, Physical
Mirjam Balbisi, Reka A. Horvath, Milan Szori, Pal Jedlovszky
Summary: The adsorption behavior of acetamide on LDA ice was studied at different temperatures using computer simulations. It was found that as the temperature decreases, the importance of acetamide-acetamide H-bonds relative to acetamide-water ones increases. The study also revealed the change in molecular orientation during adsorption and the relationship between chemical potential and temperature.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Chemistry, Physical
Mirjam Balbisi, Reka A. Horvath, Milan Szori, Pal Jedlovszky
Summary: The adsorption of acetamide on the surface of crystalline and low density amorphous ices was investigated under tropospheric conditions. The adsorption is primarily governed by the formation of new hydrogen bonds. The adsorption monolayer exhibits remarkable stability and forms a plateau in a broad range of chemical potential values.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Polymer Science
Ravikumar Thangaraj, Tamas Horvath, R. Zsanett Boros, Bela Viskolcz, Milan Szori
Summary: Industrially relevant phosgenation mechanisms of 2,4-toluenediamine (2,4-TDA) were investigated using G3MP2B3 model chemistry. Six reaction pathways had been explored, which resulted in the formation of toluene diisocyanate (2,4-TDI) including different scenarios of the 'phosgenations first' and 'consecutive phosgenations' mechanisms in both gas and condensed phases. Two possible 'phosgenations first' mechanisms show superior to the others in terms of energy, regardless of which phases are considered. Due to the o-dichlorobenzene (ODCB) solvation, the reaction barriers are dramatically reduced compared to the gas-phase reaction mechanism and the solvent effect can be described by linear relationship. Standard enthalpy of formation value was also recommended for 2,4-TDA (59.3 kJ/mol) and 2,4-TDI (-94.1 kJ/mol), as well as for the gas-phase intermediates (IM).
Article
Chemistry, Physical
Alexandra Jakab-Nacsa, Emoke Sikora, Adam Prekob, Laszlo Vanyorek, Milan Szori, Renata Zsanett Boros, Karoly Nehez, Martin Szabo, Laszlo Farkas, Bela Viskolcz
Summary: The aim of this study is to establish a mathematical model for the characterization and comparison of catalysts to support catalyst development. Through the MIRA21 model, 154 catalysts were ranked and classified, and 8% of them received the highest ranking. This ranking model can guide the selection of the most effective catalyst system for aniline production.
Article
Chemistry, Physical
Zsofia Borbala Rozsa, Ravikumar Thangaraj, Bela Viskolcz, Milan Szori
Summary: The use of carbon dioxide as a reagent in organic synthesis can help reduce atmospheric CO2 levels. This study investigates the effects and membrane permeability of compounds produced from the reaction of CO2 and 1,3-butadiene using molecular dynamics simulations and ab initio calculations. The findings show that these compounds can penetrate the membrane and disrupt its structure.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Organic
Balazs Olasz, Bela Fiser, Milan Szori, Bela Viskolcz, Michael C. Owen
Summary: This study investigates the reactivity of 4-hydroxy-2-nonenal (HNE) towards cysteine and cysteinate in different solvent environments. The results show that water enhances the reactivity of HNE towards cysteine, and the reactivity is further increased when cysteine is ionized to cysteinate.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Polymer Science
Ravikumar Thangaraj, Bela Fiser, Xuanbing Qiu, Chuanliang Li, Bela Viskolcz, Milan Szori
Summary: 2,4- and 2,6-isomers of toluene diisocyanates are important raw materials in the polyurethane industry. These compounds undergo dimerization reactions, which affect their properties. By calculating the formation enthalpy, it was found that only the formation of the 11-dimer resulted in exothermic behavior, while the 1-2-dimer was endothermic. The mechanism of the dimerization reactions for these isomers were further investigated, and specific pathways with lower activation energies were identified.
Article
Biochemistry & Molecular Biology
Timea B. Gerzsenyi, Agnes M. Ilosvai, Gergely Szilagyi, Milan Szori, Csaba Varadi, Bela Viskolcz, Laszlo Vanyorek, Emma Szori-Doroghazi
Summary: A simplified, fast, and effective method was developed to synthesize manganese ferrite magnetic nanoparticles (MnFe2O4 MNPs), which were successfully applied in DNA isolation for the first time. The particle properties were optimized through synthesis at different furnace temperatures using an ultrasonic-cavitation-assisted combustion method. The results showed that MnFe2O4 nanoparticles synthesized at 573 K exhibited desirable characteristics for DNA binding and isolation, leading to comparable DNA yield to commercial extraction products.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Physical
Binod Raj Giri, Tam V. -T. Mai, Mohamed Assali, Thi T. -D. Nguyen, Hieu T. Nguyen, Milan Szori, Lam K. Huynh, Christa Fittschen, Aamir Farooq
Summary: This study presents the kinetics of OH-initiated oxidation of 1,4-cyclohexadiene and reveals its negative temperature dependence and competing reaction pathways.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)