Implementation of simple logic gates on gold–ammonia bonding patterns in different charge states

Kryachko, Eugene S.; Remacle, Françoise

doi:10.1080/00268970701881170

Cited by 9 publications

(3 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The IR spectra of dithizone products, CTAB AuNPs, and the develeped reagent are shown in Figure 5. The Au•••N and Au•••Br stretching vibrations at 175 cm −1 and 188 cm −1 (See Figure 5A), as well as the previously reported values, 36,37 indicate that the CTAB molecules adsorb on AuNPs with their headgroups [-(CH 3 ) 3 NBr]. As reported in the literature, CTAB molecules adsorb on the surface of AuNPs in the form of a bilayer to form a hydrophilic out layer so the CTAB AuNPs can be well-dispersed in an aqueous 41,42 In the far-IR spectra of the developed reagent (see Figure 5A), the peak at 265 cm −1 , which is Au−S stretching as previously observed, 43 verifies the formation of Au−S bonds between AuNPs and [SCH 2 N 4 ] 2− .…”

Section: ■ Results and Discussionsupporting

confidence: 90%

“…The IR spectra of dithizone products, CTAB AuNPs, and the develeped reagent are shown in Figure . The Au···N and Au···Br stretching vibrations at 175 cm –1 and 188 cm –1 (See Figure A), as well as the previously reported values, , indicate that the CTAB molecules adsorb on AuNPs with their headgroups [-(CH 3 ) 3 NBr]. As reported in the literature, CTAB molecules adsorb on the surface of AuNPs in the form of a bilayer to form a hydrophilic out layer so the CTAB AuNPs can be well-dispersed in an aqueous solution. − To further verify the interactions between CTAB molecules and AuNPs, we used XPS to characterize the binding energies of characteristic elements of CTAB (C, N, and Br) before and after its modification on AuNPs.…”

Section: Resultssupporting

confidence: 51%

See 1 more Smart Citation

Colorimetric Response of Dithizone Product and Hexadecyl Trimethyl Ammonium Bromide Modified Gold Nanoparticle Dispersion to 10 Types of Heavy Metal Ions: Understanding the Involved Molecules from Experiment to Simulation

et al. 2013

View full text Add to dashboard Cite

A new kind of analytical reagent, hexadecyl trimethyl ammonium bromide (CTAB), and dithizone product-modified gold nanoparticle dispersion, is developed for colorimetric response to 10 types of heavy metal ions (M(n+)), including Cr(VI), Cr(3+), Mn(2+), Co(2+), Ni(2+), Cu(2+), Zn(2+), Cd(2+), Hg(2+), and Pb(2+). The color change of the modified gold nanoparticle dispersion is instantaneous and distinct for Mn(2+), Co(2+), Ni(2+), Cu(2+), Zn(2+), Cd(2+), Hg(2+), and Pb(2+). The color change results from the multiple reasons, such as electronic transitions, cation-π interactions, formation of coordination bonds, and M(n+)-induced aggregation of gold nanoparticles (AuNPs). The different combining capacity of heavy metal ions to modifiers results in the different broadening and red-shifting of the plasmon peak of modified AuNPs. In addition, Cr(VI), Cu(2+), Co(2+), Ni(2+), and Mn(2+) cause the new UV-vis absorption peaks in the region of 360-460 nm. The interactions between the modifiers and AuNPs, and between the modifiers and M(n+), are investigated by using Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results confirm that AuNPs are modified by CTAB and dithizone products through electrostatic interactions and Au-S bonds, respectively, and the M(n+)-N bonds form between M(n+) and dithizone products. Furthermore, the experimental and density functional theory calculated IR spectra prove that dithizone reacts with NaOH to produce C6H5O(-) and [SCH2N4](2-). The validation of this method is carried out by analysis of heavy metal ions in tap water.

show abstract

Section: ■ Results and Discussionsupporting

confidence: 90%

Section: Resultssupporting

confidence: 51%

Colorimetric Response of Dithizone Product and Hexadecyl Trimethyl Ammonium Bromide Modified Gold Nanoparticle Dispersion to 10 Types of Heavy Metal Ions: Understanding the Involved Molecules from Experiment to Simulation

et al. 2013

View full text Add to dashboard Cite

show abstract

“…We proposed to realize unary and binary logic gates on the bonding patterns of the different conformers of a molecular system (gold-ammonia) [50], where charge alternation by ionization or electron attachment or IR optically induced transitions between conformers are used to provide inputs. The readout is the presence or absence of specific bonds as a result of the bond reorganization that follows the alternation of the charge state or the optical excitation to a different conformer.…”

mentioning

confidence: 99%

Bonding patterns of [Ag₂‐alanine]^0,± hybrid complexes and the implementation of molecular logic gates

Zhang

Periyasamy

Remacle

2010

Int J of Quantum Chemistry

Self Cite

View full text Add to dashboard Cite

A structural and energetic computational analysis of various conformers of positive, neutral and negatively charged hybrid [Ag 2 -alanine] 0,6 complexes is reported using density functional theory. We show that the overall charge on the hybrid complexes influence the silver coordination mode. The positively charged cluster forms stable conformers via chelate bonds between the carboxylic group and silver dimer while the neutral cluster exhibits covalent bonding between silver and the amine nitrogen. In negatively charged clusters, bonding occurs via a weaker Ag-hydrogen bond. Unary and binary logic gates NOT, FAN-OUT, AND, NAND, OR, XOR and NOR are designed using the dependence of bonding patterns on the overall charge state of the cluster. The outputs can be read using an IR readout protocol or electrostatic potential charge distributions.

show abstract

To Nano‐Biochemistry: Picture of the Interactions of DNA with Gold

Kryachko¹

2010

Quantum Biochemistry

View full text Add to dashboard Cite

Implementation of simple logic gates on gold–ammonia bonding patterns in different charge states

Cited by 9 publications

References 52 publications

Colorimetric Response of Dithizone Product and Hexadecyl Trimethyl Ammonium Bromide Modified Gold Nanoparticle Dispersion to 10 Types of Heavy Metal Ions: Understanding the Involved Molecules from Experiment to Simulation

Colorimetric Response of Dithizone Product and Hexadecyl Trimethyl Ammonium Bromide Modified Gold Nanoparticle Dispersion to 10 Types of Heavy Metal Ions: Understanding the Involved Molecules from Experiment to Simulation

Bonding patterns of [Ag₂‐alanine]^0,± hybrid complexes and the implementation of molecular logic gates

To Nano‐Biochemistry: Picture of the Interactions of DNA with Gold

Contact Info

Product

Resources

About

Implementation of simple logic gates on gold–ammonia bonding patterns in different charge states

Cited by 9 publications

References 52 publications

Colorimetric Response of Dithizone Product and Hexadecyl Trimethyl Ammonium Bromide Modified Gold Nanoparticle Dispersion to 10 Types of Heavy Metal Ions: Understanding the Involved Molecules from Experiment to Simulation

Colorimetric Response of Dithizone Product and Hexadecyl Trimethyl Ammonium Bromide Modified Gold Nanoparticle Dispersion to 10 Types of Heavy Metal Ions: Understanding the Involved Molecules from Experiment to Simulation

Bonding patterns of [Ag2‐alanine]0,± hybrid complexes and the implementation of molecular logic gates

To Nano‐Biochemistry: Picture of the Interactions of DNA with Gold

Contact Info

Product

Resources

About

Bonding patterns of [Ag₂‐alanine]^0,± hybrid complexes and the implementation of molecular logic gates