Adsorption of a Silver Chemical Vapor Deposition Precursor on Polyurethane and Reduction of the Adsorbate to Silver Using Formaldehyde

Abstract

The interaction of the silver chemical vapor deposition precursor (1,1,1,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedionato)(trimethylphosphine)silver(I), [(fod)AgP(CH3)3], with a polyurethane surface has been investigated with reflection−absorption infrared spectroscopy (RAIRS), X-ray photoelectron spectroscopy (XPS), and atomic force microscopy (AFM). The RAIR spectra show a decrease of the intensity of both polyurethane CO and N−H vibrational bands at 90, 300, and 340 K. This suggests that a specific interaction occurs between [(fod)Ag(PMe3)] and polyurethane carbonyl groups at the surface, leading to the displacement of [P(CH3)3]. After exposure of polyurethane to the Ag complex at room temperature and above, XPS shows the presence only of Ag, F, and O, indicating displacement of [P(CH3)3] groups. The exposure of the adsorbed (fod)Ag−polyurethane complex to formaldehyde [HCHO] leads to additional deposition of silver and to the formation and the desorption of [1,1,1,2,2,3,3-heptafluoro-7,7-dimethyl-4,6-octanedione], [fodH], from the polyurethane surface. AFM indicates that the silver is present in the form of clusters. Taken together, these data demonstrate the feasibility of low-temperature CVD of silver on organic polymer substrates.

Synthesis and characterization of ultrasound assisted “graphene oxide–magnetite” hybrid, and investigation of its adsorption properties for Sr(II) and Co(II) ions

“…The peak at 529.5 eV corresponds to the bonding between Fe 3 O 4 and the graphene. The positive shift of Fe O C bonds (529.5 eV) compared to Fe O (528 eV) is previously reported for the other "metal O C" bonds such as Cu O C [51], Ag O C [52], and Zr O C [53]. (left) and that in the presence of a magnet (right)).…”

The chemistry involved in the loading of silver(I) into poly(amic acid) via ion exchange: A metal-ion-induced crosslinking behavior

“…It contains not only the formation of silver carboxylate but also the strong covalently bonding interactions between silver ions and the functional groups in PAA molecules. Scheme 4 shows what we believe (based on our FTIR, XPS data and literatures [31,[36][37][38][39]) are the most probable chemical entities formed during the ion exchange of PAA in silver ion solutions. Some of them might promote the formation of inter-or intra-molecular hydrogen-bonding [40] or might function as crosslinking points joining the macromolecules together to form the extended network and therefore make the silver-ion-doped PAA film undissolved in its original good solvent.…”

“…3. Besides the main peak centered around at a BE of 499.8 eV for the amide species (-NH-C]O) [36], an additional peak was present at 498.7 eV after ion exchange in aqueous silver fluoride and silver nitrate solution. The appearance of this new peak in the lower BE side suggests that chemical bonds (Ag-N) have also been formed between silver ions and nitrogen atoms [35].…”

Nanogold and nanosilver hybrid polymer materials

“…264 The peak at lower binding energies, centred at ca. 397.8 eV, is consistent with the formation of a N-Ag bond 314 . Again, since the nanosilver hybrid PU K5000 materials only contain 0.1 wt % silver, very minor changes to the N 1s spectrum are expected, thus only 3.3 % by area of nitrogen is in the form of bonds to silver.…”

“…previously in the literature. 314,336 The N 1s spectrum of the nanosilver bromide hybrid PU sample, when compared to the PU reference sample (Figure 6.35c-d), sees a minimal broadening of the FWHM by around 0.3 eV. The increase in the FWHM of the nitrogen in the carbamate group of the PU indicates a variability of the environments surrounding these N entities.…”