Stability Behaviour of Monolayer Tetraether Lipids on the Amino-Silanised Silicon Wafer: Comparative Study between Langmuir-Blodgett Monolayers with Self-Assembled Monolayers

This study investigated the stability behaviour of molecular monolayer symmetric chemically modified tetraether lipids caldarchaeol-PO4 on the amino-silanised silicon wafer using Langmuir-Blodgett films, Self Assembling Monolayers (SAMs), ellipsometry, and atomic force microscopy (AFM). The monolayers of caldarchaeol-PO4 were stable on the solid surface amino-silanised silicon wafer. The organizations of molecular monolayers caldarchaeol-PO4 by Langmuir-Blodgett method and SAMs have been analyzed. The surface of pressure in Langmuir-Blodgett processing is carried out monolayers caldarchaeol-PO4 more flat island inhomogeneous. Another method of monolayers caldarchaeol-PO4 by SAMs is showed a large flat domain. Monolayers caldarchaeol-PO4 by Langmuir-Blodgett method seems to be stable and chemically resistant after washing with organic solvent and an additional treatment ultrasonification with various thickness lipids arround 2 nm to 6 nm. Conversely, monolayer caldarchaeol-PO4 by SAMs appears fewer than monolayers caldarchaeol-PO4 by Langmuir-Blodgett method, the thickness of various from 1 nm to 3 nm.

Self‐assembled monolayers for perovskite solar cells

In metal‐halide perovskite solar cells(PSCs),various carrier recombination losses occur at the interface between metal oxides(MOs)and perovskite(PVK)due to the imperfect lattice structure of the crystal surface.Additionally,the nonoptimal energy levels of MOs and PVK,as well as ion diffusion and chemical corrosion between the two materials,severely hinder carrier transport at the interface.Therefore,there is an urgent need to introduce multifunctional materials between MOs and PVK to mitigate interface defects,carrier transport limitations,chemical corrosion,and other related issues.In recent years,self‐assembled monolayers(SAMs)have emerged as essential organic interfacial materials for effectively bridging MOs and PVK,playing a pivotal role in enhancing cells’performance.Based on this,we provide a detailed overview of the origin and development of SAMs in PSCs and summarize the importance and potential of SAMs from various aspects,including their chemical structure,interface passivation,energy level tuning,and interface corrosion.We finally discuss the prospects of SAMs in terms of molecular structure,deposition methods,and their application in narrow‐band gap PSCs.With these insights,it is anticipated that SAMs will assist in realizing larger,highly efficient,stable,and cost‐effective PSCs,thereby enhancing the competitiveness of PSCs in the solar photovoltaics market.

Studies on the Electron Transfer Centers of Amino Oxidase Immobilized on Self-Asembly Monolayer Using Electrochemical Methods

The direct electron transfer of amino oxidase on electrode surface based on self assembly technique occurs at 505 mV( vs . Ag/AgCl), indicating that copper atoms are the electron transfer centers and catalytic centers of amino oxidase.

Highly Oriented ZnO Rod Arrays on Si Substrates from Aqueous Solution

Ordered zinc oxide （ZnO） rod arrays with very high orientation were fabricated on Si substrates by using a solution method. The substrate surfaces were functionalized by Self-Assembly Monolayers （SAMs）. In the very early growth stage, the oriented ZnO crystals had already grown, which appeared to be the main reason why ZnO nanorods showed very high orientation. The un-dense and un-uniform SAMs provided a surface that was heterogeneous to ZnO nucleation. Consequently, highly oriented ZnO rods were selectively grown on the ＂coin-like＂ SAM-uncovered regions. The route developed here can provide some helpful information to control the nucleation and orientation of ZnO in aqueous solution. Also, the site-selective growth mechanisms can indicate a clue to grow patterned highly oriented ZnO nanorod arrays by the organic template.

Electroless silver plating for metallization of near-field optical fiber probes

By using mercaptopropyltrimethoxysilane （MPTS） self-assembled monolayers （SAMs）, electroless silver plating is developed for the metallization of near-field optical fiber probes. This method has the advantages of controllability, no pinholes, convenience, low cost, and smooth tip surface. The metallized probes are characterized by optical microscopy, scanning electron microscopy （SEM）, and energy dispersive X-ray spectroscopy （EDXS）.