Thermolysis of gold(i) thiolate complexes producing novel gold nanoparticles passivated by alkyl groups

Nakamoto, Masami; Yamamoto, Mari; Fukusumi, Masao

doi:10.1039/b203736j

Cited by 95 publications

(64 citation statements)

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“…The Au atoms in the solution of DT/Au = 16 exist as Au + ions, whose 5d states are fully occupied by electrons. [19,20] The spectra were fitted with the linear combination of those obtained for DT/ The UV/Vis spectra of the solutions for various DT/Au ratios were also measured (Supporting Information, Figure S1). The intensity and shape of the LMCT band varied as per the conversion of Au 3 + to Au + when DT/Au was between 0 and 2.…”

Section: Junya Ohyamamentioning

confidence: 99%

In Situ Observation of Nucleation and Growth Process of Gold Nanoparticles by Quick XAFS Spectroscopy

et al. 2010

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Section: Junya Ohyamamentioning

confidence: 99%

In Situ Observation of Nucleation and Growth Process of Gold Nanoparticles by Quick XAFS Spectroscopy

et al. 2010

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“…We decided to carry out an in situ synthesis of a thiolate followed by its decomposition, as thiolates are known to give rise to uniform sized Au nanocrystals upon thermolysis [45]. A simple mixing of Au(PPh 3 )Cl and dodecanethiol solutions at room temperature leads to the formation of the Au(I)-thiolate as shown in the XRD data in Fig.…”

Section: Resultsmentioning

confidence: 99%

Micro- and nanostripes of self-assembled Au nanocrystal superlattices by direct micromolding

Radha

2010

Nano Res.

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A simple, inexpensive direct micromolding method for patterning Au nanocrystal superlattices using a polydimethylsiloxane (PDMS) stamp has been developed. The method involves in situ synthesis of Au(I) dodecanethiolate and its decomposition leading to Au nanocrystals in the microchannels of the stamp which order themselves to form patterned superlattice stripes, in conformity with the stamp geometry. Owing to its insolubility in common solvents, the dodecanethiolate was made by reacting Au(PPh 3 )Cl and dodecanethiol in situ inside the microchannels, by injecting first the former solution in toluene at room temperature followed by the thiol solution at 120 °C . Annealing the reaction mixture at 250 °C , resulted in formation of nanocrystals (with a mean diameter of 7.5 nm) and hexagonal ordering. By using an external pressure while molding, parallel stripes with sub-100 nm widths were obtained. The choice of parameters such as injection temperature of the thiol and concentrations is shown to be important if an ordered superlattice is to be obtained. In addition, these parameters can be varied as a means to control the nanocrystal size.

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“…On the other hand, the controlled thermolysis of C 13 H 27 CO 2 Ag in the presence of Et 3 N can be conducted under the mild condition of 80ºC for 2h to produce mondispersed silver nanoparticles capped by myristate ligand (average diameter 4.4±0.2 nm) as shown in Figure 1 [1][2][3]. In this context, a series of silver nanoparticles has been prepared by the controlled themolysis of silver carboxylates in the presence of amine [4].…”

Section: Silver Nanoparticles Prepared By the Controlled Thermolysis mentioning

confidence: 99%

A Variety of Silver Nanoparticle Pastes for Fine Electronic Circuit Pattern Formation

Nakamoto

Yamamoto

Kashiwagi

et al. 2007

Polytronic 2007 - 6th International Conference on Polymers and Adhesives in Microelectronics and Photonics

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Metal powder-based thick-film pastes are limited to make the electronic circuit pattern on the refractory ceramics or glass, because of their firing temperature. In addition, the line width and space of the circuit pattern are limited over 50 µm. However, the electronic devices are recently demanded to be compact, lightweight and flexible. For this demand, recent progress of nanotechnology has accelerated to develop a new type of materials for electronic devices. From this point of view, much attention has been paid to metal nanoparticles with diameters ranging from several nanometers to tens of nanometers, which may be expected to be fired at low temperature less than 300 ºC based on their physical property. Using a series of silver nanoparticles, we have developed the low temperature firing silver nanoparticle pastes, including silver nanoparticles stabilized by a series of organic ligands. The silver contents of the manufactured silver nanoparticle pastes are easily controlled ranging from 50 to 90 wt%. The electronic circuit pattern can be formed on a polyimido film by screen printing technique and fired at low temperatures of 150 to 300 ºC. The formed conductive films exhibit the resistivity compared with that of bulk metal. The film thickness ranges from 2.6 to 30µm and their resistivity is 2.46 to 40 µΩcm. This paper describes a variety of silver nanoparticle pastes and the properties of their fired film.

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Thermolysis of gold(i) thiolate complexes producing novel gold nanoparticles passivated by alkyl groups

Cited by 95 publications

References 10 publications

In Situ Observation of Nucleation and Growth Process of Gold Nanoparticles by Quick XAFS Spectroscopy

In Situ Observation of Nucleation and Growth Process of Gold Nanoparticles by Quick XAFS Spectroscopy

Micro- and nanostripes of self-assembled Au nanocrystal superlattices by direct micromolding

A Variety of Silver Nanoparticle Pastes for Fine Electronic Circuit Pattern Formation

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