Formation, Stability, and Replacement of Thiol Self‐Assembled Monolayers as a Practical Guide to Prepare Nanogaps in Nanoparticle‐on‐Mirror Systems

Abstract

We provide practical information about the basic properties of SAMs to prepare and modify NPoM systems.

Large‐Scale Sub‐1‐nm Random Gaps Approaching the Quantum Upper Limit for Quantitative Chemical Sensing

“…The signal amplitude decreases for both higher (i.e., region I) and lower molecule concentrations (i.e., region II), indicating that quantum enhancement limit regime was approached at this concentration, agreeing well with previously reported literature: [ 65 ] that is, this concentration of 1 m m was mostly used to form a SAM of 4‐MBT molecules in previous works. [ 66,67 ] In particular, in the low concentration region II, those measured data points can be fitted using the Langmuir model: [ 68 ] …”

Molecular Self‐Assembly of Phenylselenyl Chloride on a Au(111) Surface

“…This advantageous trait enables SAMs to be utilized in a wide array of applications, such as surface wetting, biosensors, nanolithography, and electronic devices 1–4 . SAMs derived from organic thiols or disulfides on Au(111) have been extensively studied due to their high structural order and chemical stability resulting from strong chemical interactions between the sulfur headgroup and the gold surface 1–4,19–24 . Discovery of new precursors for SAM formation is critical to achieving better understanding of the self‐assembly mechanism, surface structure, molecular orientations, and chemical stability of SAMs.…”

“…[1][2][3][4] SAMs derived from organic thiols or disulfides on Au(111) have been extensively studied due to their high structural order and chemical stability resulting from strong chemical interactions between the sulfur headgroup and the gold surface. [1][2][3][4][19][20][21][22][23][24] Discovery of new precursors for SAM formation is critical to achieving better understanding of the self-assembly mechanism, surface structure, molecular orientations, and chemical stability of SAMs. New SAM precursors may provide novel opportunities for practical application of SAMs.…”

Steric Effects on the Formation of Self‐Assembled Monolayers of Alicyclic Thiol Derivatives on Au(111)

“…The functionalization of solid surfaces with nanoscale precision can be achieved using self‐assembled monolayers (SAMs) formed by adsorption of various adsorbates 1–16 . Therefore, SAMs have been extensively used in nanoscience and nanotechnology such as molecular sensors, 17 bio‐interface, 1,18,19 nanopatterning, 1,20 and molecular electronics 2,21–23 .…”