AuNP Series

AuNP Series 1. PSS/AuNP/SWCNT dispersion used. 

AuNP Series 2. PSS/SWCNT and PSS/AuNP dispersions used together. 

From the results presented in Figure 6.27 one can see that there is little difference between the ultimate conductivities of the systems compared, although the system based on AuNP series 3 seems to... 

Composites prepared with a PS-b-PDMAEMA/AuNP/SWCNT dispersion [AuNP Series 4) are examined and the final percolation thresholds are given in Figure 6.28, along with the control system where only SWCNTs are present. 

Biirgi and co-workers [154-156] have reported a series of conformational investigations of chiral ligands absorbed on AuNPs using VCD spectroscopy complemented with DFT calculations, a powerful spectroscopic tool for conformational studies of condensed matters. Three organic chiral molecules, namely /V-acetyl-cysteine, /V- isobutyry I -cysteine, and l,l -binaphthyl-2,2 -dithiol (BINAS), were used as chiral ligands in their studies. The details about how to prepare monolayer-protected AuNPs with these ligands can be found in the pertinent references [154-156]. The measured VA and VCD spectra of the AuPNs protected by /V-isobutyryl-L/D-cysteine monolayer are shown in Fig. 18, as examples. As one... 

Another series of AuNP-based colorimetric aptasensnors have been fabricated by Lu s group in a very smart design in which small molecules make use of a duplex-to-complex mode (Lu and Liu, 2006, 2007). In the example shown in Figure 12.15B, AuNPs are reduced to purple aggregates by a duplex consisting of an aptamer-contained chain and two complementary chains in which AuNPs are modified on the 3 end (3 -AdapAu) or the 5 end (5 -AdapAu), respectively... 

A series of nanocomposites have been synthesized by varying the concentration of graphene and chloroauric acid to optimize the formulation with respect to the electrochemical activities. Out of these series of NSPANI/AuNP/GR nanocomposites, it has been foxmd that only one particular nanocomposite has the best electrochemical properties, as analyzed by cyclic voltammetry (CV) and differential pulse voltammetric (DPV) techniques (Figure 13.11) and conductivity. The CV of the best nanocomposites shows the well-defined reversible redox peaks characteristic... 

Figure 14.12 Schematic illustration of the modified electrode the gold electrode with a self-assembled thiourea monolayer (SATUM) (a) a small tube containing the gold nanoparticle solution was fitted on the electrode, gold nanoparticles was adsorbed on the electrode via the SATUM (SATUM/AuNPs) (b), mercaptosuccinic acid adsorbed on the AuNP layer (SATUM/AuNPs/MSA) (c), and activated with EDC/NHS to immobilize the antibody (anti-CAP) (d). The layers on the modified gold electrode surface are represented by capacitors in series (e) where CSATUM/AuNPs/MSA is the capacitance related to the SATUM/AuNPs/MSA layer, is the capacitance related to the chloramphenicol antibody layer and Cq,p is the...

Fig. 35.1 (Top, left) Synthesis of bidentate thiolate calix[4]arene 2a and 2b (right) schematic representation of the synthesis of a series of AuNPs having a mixed organic monolayer of thiolate calix[4]arene (2a or 2b) and dodecanthiol (C12SH) prepared by a ligand-exchange reaction liom dodecanthiol-capped AuNP(C12) bottom, left) 1,3-dipropoxy calix[4]arene 3 and tetramethy-lammonium and A-methyl pyridinium salts...

In more recent studies, the fabrication of hybrid systems based on the reversible assembly of AuNP(2a) on a Si(lOO) surface was tackled [41]. This process was mediated by a series of hierarchical and reversible complexation steps involving a bifunctional guest (12), and two calix[n]arene-based hosts (2a and 11) which were used to functionalize two inorganic components (Fig. 35.7). The thiolate calix[4] arene 2a was covalently loaded on 5 nm AuNP(2a), while the novel tris((V-... 

The difference between Series 1 and 3 is the concentration of AuNP, which is double in Series 3 compared with Series 1. 

Figure 6.27 Results from conductivity measurements for various AuNP composites prepared using PSS as stabilizing agent, and the series CONTROL 1 (squares, without AuNPs].

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