Electrodeposition of Silver Micro- and Nanoscale Wires in the Capillaries of PDMS Stamps Modified with Hydrophilic Polymers

Abstract

A new experiment for use in introductory nanotechnology courses is described. This experiment allows students to fabricate metallic wires with microscale lateral dimensions and nanoscale vertical dimensions. Fabrication occurs in the capillaries of polydimethylsiloxane (PDMS) stamps modified with hydrophilic polymers. This experiment provides students with an opportunity to conduct templateassisted electrodeposition of micro-and nanomaterials, utilizing a reusable template instead of the commonly used porous, anodic alumina oxide (AAO) membranes that require dissolution to examine the wires. Fabrication of the metal wires is accomplished via the reduction of metal cations in the channels of modified PDMS stamps. In addition, this experiment introduces students to characterization using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and atomic-force microscopy (AFM). The microscale dimensions of the silver wires accommodate imaging with optical microscopy for institutions possessing limited characterization capabilities.

Quantum chemical topology at the spin–orbit configuration interaction level: Application to astatine compounds

“…The multiconfigurational calculations typically start with a state‐average complete active space self‐consistent field (SA‐CASSCF) step, eventually supplemented by a more correlated post‐CASSCF treatment. [ 47–53 ] The second step consists of diagonalizing the H tot = E el + H SOC matrix within the basis of the spin (i.e., M S ) components of the previously obtained SOF states. By mixing the components of the SOF states, the SOC operator leads to sizeable changes in the wave function, [ 8,9,12,54 ] which can be monitored in terms of the ONs of the NOs 55,56 …”

Asymmetric Ring Opening in a Tetrazine‐Based Ligand Affords a Tetranuclear Opto‐Magnetic Ytterbium Complex

“…All spin‐free states obtained either from the state‐averaged CASSCF or XMS‐CASPT2 calculations were mixed by spin‐orbit coupling using the restricted active space state interaction (SO‐RASSI) approach to obtain final energy spectra and wave functions of both Yb 3+ ions [52] . The static magnetic properties of Yb1 and Yb2 were extracted from the final SO‐RASSI wave functions using the SINGLE_ANISO routine, [85–89] whereas the magnetic exchange and dipolar interactions between Yb 3+ ions were calculated with the POLY_ANISO routine [86, 87] . The Lines model, [90] as implemented in the POLY_ANISO routine, was used to model the exchange interactions with the following Heisenberg Hamiltonian [Eq.…”

Deposition of the Spin Crossover FeII–Pyrazolylborate Complex on Au(111) Surface at the Molecular Level

“…The relative stability of the LS and HS states of the isolated molecule was evaluated on the basis of the multiconfigurational second order theory (CASPT2 [33] and NEVPT2 [34] approaches). The reference wavefunction for each state is obtained from complete active space self‐consistent field CASSCF calculations.…”