Category: 143-10-2

On November 11, 2021, Brown, Sarah; Sayler, Jeffrey D.; Sibener, S. J. published an article.Category: alcohols-buliding-blocks The title of the article was Influence of Structural Dynamics on the Kinetics of Atomic Hydrogen Reactivity with Low-Temperature Alkanethiolate Self-Assembled Monolayers. And the article contained the following:

This study examines the impact of surface temperature on alkanethiolate self-assembled monolayer (SAM) reactivity with at. hydrogen (H) as well as how the combined effects of temperature and alkanethiol chain length alter the reaction outcome. This is achieved using ultrahigh vacuum scanning tunneling microscopy (UHV-STM) to monitor the spatiotemporal evolution of the monolayer throughout the reaction. We find that with decreasing temperature, the reaction rate of alkanethiol SAMs with at. H decreases monotonically. Furthermore, the kinetic profile of the low-temperature reaction differs from that at room temperature, indicating structural and dynamical fluctuations within the monolayer that influence reactivity. Chain length is also seen to significantly affect reactivity at reduced substrate temperature, with longer alkanethiols reacting more slowly than shorter ones. Finally, we observe a unique surface rearrangement of the SAM upon exposure to at. H, including changes in the organization of close-packed thiol domains and the evolution of gold adatom islands not observed at elevated temperatures Overall, this work provides both quant. and nanoscopic insight into how substrate temperature influences the structural dynamics of thiolate monolayers and how these fluctuations influence chem. reactivity. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Category: alcohols-buliding-blocks

The Article related to atomic hydrogen thiol self assembly monolayer reactivity, Surface Chemistry and Colloids: Solid-Gas Systems and other aspects.Category: alcohols-buliding-blocks

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On June 30, 2020, Truyens, Anne-Julie; Vekeman, Jelle; Tielens, Frederik published an article.Synthetic Route of 143-10-2 The title of the article was A subtle balance between interchain interactions and surface reconstruction at the origin of the alkylthiol/Au(111) self-assembled monolayer geometry. And the article contained the following:

In this paper we present a DFT investigation on the structure and energetics of (√3 × 2√3)R30° high coverage SAMs of n-alkanethiols up to twelve carbon atoms on a clean Au(111) surface. The surface was found to be more reconstructed for longer chains, although a surface reconstruction plateau was reached for decanethiol SAMs. The geometry was suggested to be dictated by steric effects and van der Waals interactions between the adsorbates resulting in a specific adsorption configuration. Furthermore, the increasing adsorption energy per thiol mol. is due to the increasing van der Waals forces between the adsorbates. In conclusion a more stable monolayer was obtained with increasing adsorbate chain length. In other words a subtle balance between interchain interactions and surface reconstruction is at the origin of the alkylthiol/Au(111) self-assembled monolayer geometry. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Synthetic Route of 143-10-2

The Article related to surface reconstruction self assembly monolayer gold thiol, Surface Chemistry and Colloids: Solid-Gas Systems and other aspects.Synthetic Route of 143-10-2

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On August 30, 2022, Tsvetanova, Martina; Syromyatnikov, Alexey G.; Zandvliet, Harold J. W.; Klavsyuk, Andrey L.; Sotthewes, Kai published an article.SDS of cas: 143-10-2 The title of the article was Low coverage disordered decanethiol monolayers on Au(001): A conjecture regarding the formation of Au-adatom-molecule complexes. And the article contained the following:

We present a scanning tunneling microscopy study of decanethiol on Au(001) in the low coverage regime. As expected, the hex reconstruction is lifted, however, no ordered decanethiol phases form. We observe large areas free of Au islands and covered with a disordered decanethiol phase. I(t) spectroscopy measurements suggest that this disordered phase is dynamic and most likely comprises diffusing Au adatoms, decanethiol mols., and/or Au-adatom-decanethiol mol. complexes. We have performed d. functional theory calculations and show that the activation barrier for diffusion is lower when Au-adatom-mol. complexes are considered in comparison to the case of bare mol. These findings suggest that although no vacancy pits form on Au(001), Au-adatoms expelled during the lifting of the hex reconstruction may be still important for the diffusion of thiol mols. on this surface. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).SDS of cas: 143-10-2

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On April 21, 2020, Zhou, Guobing; Liu, Chang; Bumm, Lloyd A.; Huang, Liangliang published an article.Synthetic Route of 143-10-2 The title of the article was Force Field Parameter Development for the Thiolate/Defective Au(111) Interface. And the article contained the following:

A mol.-level understanding of the interplay between self-assembled monolayers (SAMs) of thiolates and gold surface is of great importance to a wide range of applications in surface science and nanotechnol. Despite theor. research progress of the past decade, an atomistic model, capable of describing key features of SAMs at reconstructed gold surfaces, is still missing. In this work, periodic ab initio d. functional theory (DFT) calculations were utilized to develop a new atomistic force field model for alkanethiolate (AT) SAMs on a reconstructed Au(111) surface. The new force field parameters were carefully trained to reproduce the key features, including vibrational spectra and torsion energy profiles of ethylthiolate (C2S) in the bridge or staple motif model on the Au(111) surface, wherein, the force constants of the bond and angle terms were trained by matching the vibrational spectra, while the torsion parameters of the dihedral angles were trained via fitting the torsion energy profiles from DFT calculations To validate the developed force field parameters, we performed classical mol. dynamics (MD) simulations for both pristine and reconstructed Au-S interface models with a (2√3 x 3) unit cell, which includes four dodecanethiolate (C10S) mols. on the Au(111) surface. The simulation results showed that the geometrical features of the investigated Au-S interface models and structural properties of the C10S SAMs are in good agreement with the ab initio MD studies. The newly developed atomistic force field model provides new fundamental insights into AT SAMs on the reconstructed Au(111) surface and adds advancement to the existing interface research knowledge. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Synthetic Route of 143-10-2

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On April 28, 2022, Du, Chuanshen; Andino, Richard S.; Rotondaro, Matthew C.; Devlin, Shane W.; Erramilli, Shyamsunder; Ziegler, Lawrence D.; Thuo, Martin M. published an article.Formula: C10H22S The title of the article was Substrate Roughness and Tilt Angle Dependence of Sum-Frequency Generation Odd-Even Effects in Self-Assembled Monolayers. And the article contained the following:

Role of substrate type, gold or silver, and surface roughness on the parity odd-even effect in n-alkanethiolate (n = 10-16) self-assembled monolayers (SAMs), materials of potential importance to mol. scale electronics, is studied using vibrational sum-frequency generation (SFG) spectroscopy. An inverted odd-even effect is observed for SAMs on Ag substrates relative to SAMs on Au. The metal-specific SFG spectra in the Me and methylene stretching regions provide a sensitive probe of the in situ cant angle and mol. twist dependence of the interfacial group orientation. Within the precision of these measurements, disorder due to gauche defects is not evident in this spectral anal. SFG Me vibrational frequencies and line widths show parity and substrate dependence. Metal substrate roughness, an under-reported exptl. parameter, affects the extent of odd-even Me orientation anisotropy. Parity-dependent Me orientation effects are seen on Ag beyond the roughness limit established by hydrophobicity data on Au. The SFG anal. predicts an ~2.8 nm rms roughness limit for odd-even effects on Ag substrates. These SFG results further confirm the role competing pairwise short-range dispersive (∝1/r6) and longer range polar (∝1/r to 1/r4) interactions play in controlling the observed odd-even wetting behavior of SAMs on metal substrates as a function of surface roughness. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Formula: C10H22S

The Article related to surface roughness wetting self assembly monolayer gold silver thiol, Surface Chemistry and Colloids: Solid-Gas Systems and other aspects.Formula: C10H22S

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On June 4, 2020, Kap, Oezlem; Kabanov, Nikolai; Tsvetanova, Martina; Varlikli, Canan; Klavsyuk, Andrey L.; Zandvliet, Harold J. W.; Sotthewes, Kai published an article.Product Details of 143-10-2 The title of the article was Structural Stability of Physisorbed Air-Oxidized Decanethiols on Au(111). And the article contained the following:

We have studied the dynamic behavior of decanethiol and air-oxidized decanethiol self-assembled monolayers (SAMs) on Au(111) using time-resolved scanning tunneling microscopy at room temperature The air-oxidized decanethiols arrange in a lamellae-like structure leaving the herringbone reconstruction of the Au(111) surface intact, indicating a rather weak interaction between the mols. and the surface. Successive STM images show that the air-oxidized mols. are structurally more stable as compared to the nonoxidized decanethiol mols. This is further confirmed by performing current-time traces with the feedback loop disabled at different locations and at different mol. phases. D. function theory calculations reveal that the diffusion barrier of the physisorbed oxidized decanethiol mol. on Au(111) is about 100 meV higher than the diffusion barrier of a chemisorbed Au-decanethiol complex on Au(111). A two-dimensional activity map of individual current-time traces performed on the air-oxidized decanethiol phase reveals that all the dynamic events take place within the vacancy lines between the air-oxidized decanethiols. These results reveal that the oxidation of thiols provides a pathway to produce more robust and stable self-assembled monolayers at ambient conditions. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Product Details of 143-10-2

The Article related to decanethiol gold stability surface oxidation self assembly monolayer, Surface Chemistry and Colloids: Solid-Gas Systems and other aspects.Product Details of 143-10-2

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On June 26, 2020, Ju, Jian; Hsieh, Chao-Mao; Tian, Yao; Kang, Jian; Chia, Ruining; Chang, Hao; Bai, Yanru; Xu, Chenjie; Wang, Xiaomeng; Liu, Quan published an article.Electric Literature of 143-10-2 The title of the article was Surface Enhanced Raman Spectroscopy Based Biosensor with a Microneedle Array for Minimally Invasive In Vivo Glucose Measurements. And the article contained the following:

To monitor blood glucose levels reliably, diabetic patients usually have to undergo frequent fingerstick tests to draw out fresh blood, which is painful and inconvenient with the potential risk of cross contamination especially when the lancet is reused or not properly sterilized. This work reports a novel surface-enhanced Raman spectroscopy (SERS) sensor for the in situ intradermal detection of glucose based on a low-cost poly(Me methacrylate) microneedle (PMMA MN) array. After incorporating 1-decanethiol (1-DT) onto the silver-coated array surface, the sensor was calibrated in the range of 0-20 mM in skin phantoms then tested for the in vivo quantification of glucose in a mouse model of streptozocin (STZ)-induced type I diabetes. The results showed that the functional poly(Me methacrylate) microneedle (F-PMMA MN) array was able to directly measure glucose in the interstitial fluid (ISF) in a few minutes and retain its structural integrity without swelling. The Clarke error grid anal. of measured data indicated that 93% of the data points lie in zones A and B. Moreover, the MN array exhibited minimal invasiveness to the skin as the skin recovered well without any noticeable adverse reaction in 10 min after measurements. With further improvement and proper validation, this polymeric MN array-based SERS biosensor has the potential to be used in painless glucose monitoring of diabetic patients in the future. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Electric Literature of 143-10-2

The Article related to sers biosensor glucose, glucose sensing, in vivo biosensor, microneedle array, minimally invasive intradermal measurements, surface enhanced raman scattering, Biochemical Methods: Spectral and Related Methods and other aspects.Electric Literature of 143-10-2

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On September 16, 2022, Scaini, Denis; Biscarini, Fabio; Casalis, Loredana; Albonetti, Cristiano published an article.HPLC of Formula: 143-10-2 The title of the article was Substrate roughness influence on the order of nanografted Self-Assembled Monolayers. And the article contained the following:

Adjacent patches of alkanethiol mols. whose chain lengths range from 11 to 15 carbon atoms are fabricated by nanografting within a Self-Assembled Monolayer matrix. Atomic Force Microscopy and Electrostatic Force Microscopy are employed to investigate their structural and electronic properties, highlighting the key role of the substrate roughness. In particular, the topog. phase signal allows to establish an odd-even dependence of the local stiffness vs. the alkyl chain length, while the electrostatic force signal provides evidence that the conformational order vs. the alkyl chain length follows an asym. parabolic trend induced by the substrate roughness. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).HPLC of Formula: 143-10-2

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On March 22, 2022, Litak, Nicholas P.; Mawby, Lillian M.; Lear, Benjamin J. published an article.Category: alcohols-buliding-blocks The title of the article was Surface Chemistry Controls the Density of States in Metallic Nanoparticles. And the article contained the following:

Ligand-stabilized colloidal metallic nanoparticles are prized in science and technol. for their electronic properties and tunable surface chem. However, little is known about the interplay between these two aspects of the particles. A particularly glaring absence concerns the d. of electronic states, which is fundamental in explaining the electronic properties of solid-state materials. In part, this absence owes to the difficulty in the exptl. determination of the parameter for colloidal systems. Herein, we demonstrate the d. of electronic states for metallic colloidal particles can be determined from their magnetic susceptibility, measured using NMR spectroscopy. For this study, we use small alkanethiolate protected gold nanoparticles and demonstrate that changes in the surface chem., as subtle as changes in alkane chain length, can result inasmuch as a 3-fold change in the d. of states at the Fermi level for these particles. This suggests that surface chem. can be a powerful tool for controlling the electronic behavior of the materials to which they are attached, and suggests a paradigm that could be applied to other metallic systems, such as other metal nanoparticles, doped semiconductor systems, and even 2D metals. For all of these metallic systems, the Evans method can serve as a simple means to probe the d. of states near the Fermi level. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Category: alcohols-buliding-blocks

The Article related to gold nanoparticle dos surface chem, nmr, density of states, electronic bands, gold, ligands, magnetic susceptibility, nanoparticles, Surface Chemistry and Colloids: Solid-Solid Systems and other aspects.Category: alcohols-buliding-blocks

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Weng, Can; Chen, Jiachen; Yang, Jin; Zhou, Mingyong; Jiang, Bingyan published an article in 2021, the title of the article was Experimental Investigation and Molecular Dynamics Simulation on the Anti-Adhesion Behavior of Alkanethiols on Nickel Insert in Micro Injection Molding.Formula: C10H22S And the article contains the following content:

Due to the adhesion between the polymer melt and nickel (Ni) mold insert in the micro injection molding process, deformation defects frequently occur when the microstructures are demolded from the insert. In this study, self-assembled alkanethiols were applied to modify the surface of Ni mold insert to reduce its surface energy. Exptl. trials were undertaken to explore the effect of alkanethiols coating on the replication quality. After that, mol. dynamics (MD) simulation was then used to investigate the adhesion behavior between the self-assembled coating and polypropylene (PP) by establishing three different types of alkanethiol material. The interaction energy, the potential energy change and radial distribution function were calculated to study the anti-adhesion mechanism. Exptl. results show that all the three coatings can effectively decrease the adhesion and therefore promote the replication fidelity. It is demonstrated in MD simulation that the adhesion mainly comes from the van der Waals (vdW) force at the interface. The arrangement of sulfur atom on the Ni surface results in different absorbing behaviors. Compared with that of the PP-Ni interface, the interfacial energy and adhesion work after surface treatment is significantly reduced. The experimental process involved the reaction of 1-Decanethiol(cas: 143-10-2).Formula: C10H22S

The Article related to alkanethiol anti adhesion mol dynamics simulation injection molding, anti-adhesion, micro injection molding, molecular dynamics simulation, self-assembled monolayers, Surface Chemistry and Colloids: Solid-Solid Systems and other aspects.Formula: C10H22S

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