Preparation of submicron-sized spherical particles of gold using laser-induced melting in liquids and low-toxic stabilizing reagent

Tsuji, Takeshi; Higashi, Yuuma; Tsuji, Masaharu; Ishikawa, Yoshie; Koshizaki, Naoto

doi:10.1016/j.apsusc.2015.02.057

Cited by 26 publications

(39 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By using LML methods, ar ange of semiconductor submicrospheres (SMS) with tunable size distribution were prepared, such as SiO 2 ,T iO 2 ,C uO, Cu 2 O, ZnO, and ZrO 2 . For example, Ts uji [23] prepared submircon-sized Au particlesw ith al ow toxic surfacebyu tilizing NaCl solution as liquids. By adjusting the laser fluence, chemical conversions can also take place.…”

Section: Introductionmentioning

confidence: 99%

Laser‐Irradiation‐Induced Melting and Reduction Reaction for the Formation of Pt‐Based Bimetallic Alloy Particles in Liquids

Han

Dai

et al. 2017

ChemPhysChem

View full text Add to dashboard Cite

Laser melting in liquids (LML) is one of the most effective methods to prepare bimetallic alloys; however, despite being an ongoing focus of research, the process involved in the formation of such species remains ambiguous. In this paper, we prepared two types of Pt-based bimetallic alloys by LML, including Pt-Au alloys and Pt-iron group metal (iM=Fe/Co/Ni) alloys, and investigated the corresponding mechanisms of alloying process. Detailed component and structural characterizations indicate that laser irradiation induced a quite rapid formation process (not exceeding 10 s) of Pt-Au alloy nanospheres, and the crystalline structures of Pt-Au alloys is determined by the monometallic constituents with higher content. For Pt-iM alloys, we provide direct evidence to support the conclusion that FeO /CoO /NiO colloids can be reduced to elementary Fe/Co/Ni particles by ethanol molecules during laser irradiation, which then react with Pt colloids to form Pt-iM sub-microspheres. These results demonstrate that LML provides an optional route to prepare Pt-based bimetallic alloy particles with tunable size, components, and crystalline phase, which should have promising applications in biological and catalysis studies.

show abstract

Section: Introductionmentioning

confidence: 99%

Laser‐Irradiation‐Induced Melting and Reduction Reaction for the Formation of Pt‐Based Bimetallic Alloy Particles in Liquids

Han

Dai

et al. 2017

ChemPhysChem

View full text Add to dashboard Cite

show abstract

“…In contrast to size-reducing pulsed laser fragmentation (PLFL), lower laser fluences are required, resulting in particle melting and resolidification as spheres. Tsuji and coworkers recently reported the possibilities to melt aggregated Au NP to SMS with 532 nm laser light and found a PLML induction time interval caused by the laser-induced surfactant removal 18,19 . A limitation to high laser fluences was reported by Wang et al for the laser melting of CuO nanoparticles to copper SMS 11 .…”

Section: Introductionmentioning

confidence: 99%

Inclusion of supported gold nanoparticles into their semiconductor support

Lau

Ziefuß

Komossa

et al. 2015

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

Supported particles are easily accessible as standard materials used in heterogeneous catalysis and photocatalysis. This article addresses our exemplary studies on the integration of supported nanoparticles into their solid support, namely gold nanoparticles into zinc oxide sub-micrometer spheres, by energy controlled pulsed laser melting in a free liquid jet. This one-step, continuous flow-through processing route reverses the educt's structure, converting the ligand-free surface adsorbate into a spherical subsurface solid inclusion within its former support. The results show how a nanoparticulate surface adsorbate can be included in the form of crystalline nanoparticles into the resolidified support matrix, demonstrated by using plasmonic nanoparticles and semiconductor microparticles as reference materials.

show abstract

“…To artificially decrease the NPs’ distance and to increase the chance for adjacent particles to interact and merge into SMSs upon laser irradiation, NPs agglomeration or aggregation is considered to be a prerequisite step for SMSs formation from nanoparticle educts. In general, NP aggregation is mostly realized by salts (e.g., NaCl) during sample preparation or by adding stabilizing reagent (e.g., citrate) during the LML process36. Despite successful synthesis of a series of SMSs, the embedment or integration of additives inside the SMSs may increase the risk of contamination and compromise the function performance for desirable applications, such as catalysis, solar cell, etc.…”

Section: Discussionmentioning

confidence: 99%

“…3c,d. For their growth into bigger SMSs, the well-known agglomeration-induced LML3637 is the preferable route. This finding is in accordance with the reports by Serkov et al .…”

Section: Discussionmentioning

confidence: 99%

“…Recent advance in LML has shown its strength in the synthesis of a large variety of SMSs such as Si34, Au353637, B 4 C38, Fe29, Cu29, Ag39, CuO40, ZnO2841. Employment of superfluid helium which offers unique extreme conditions, including low temperatures, ultralow viscosity, high thermal conductivity, and good transparency in the visible region, can even allow the formation of CeO 2 SMSs from anisotropic materials42.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Germanium Sub-Microspheres Synthesized by Picosecond Pulsed Laser Melting in Liquids: Educt Size Effects

Zhang

Lau

et al. 2017

Sci Rep

View full text Add to dashboard Cite

Pulsed laser melting in liquid (PLML) has emerged as a facile approach to synthesize submicron spheres (SMSs) for various applications. Typically lasers with long pulse durations in the nanosecond regime are used. However, recent findings show that during melting the energy absorbed by the particle will be dissipated promptly after laser-matter interaction following the temperature decrease within tens of nanoseconds and hence limiting the efficiency of longer pulse widths. Here, the feasibility to utilize a picosecond laser to synthesize Ge SMSs (200~1000 nm in diameter) is demonstrated by irradiating polydisperse Ge powders in water and isopropanol. Through analyzing the educt size dependent SMSs formation mechanism, we find that Ge powders (200~1000 nm) are directly transformed into SMSs during PLML via reshaping, while comparatively larger powders (1000~2000 nm) are split into daughter SMSs via liquid droplet bisection. Furthermore, the contribution of powders larger than 2000 nm and smaller than 200 nm to form SMSs is discussed. This work shows that compared to nanosecond lasers, picosecond lasers are also suitable to produce SMSs if the pulse duration is longer than the material electron-phonon coupling period to allow thermal relaxation.

show abstract

Preparation of submicron-sized spherical particles of gold using laser-induced melting in liquids and low-toxic stabilizing reagent

Cited by 26 publications

References 25 publications

Laser‐Irradiation‐Induced Melting and Reduction Reaction for the Formation of Pt‐Based Bimetallic Alloy Particles in Liquids

Laser‐Irradiation‐Induced Melting and Reduction Reaction for the Formation of Pt‐Based Bimetallic Alloy Particles in Liquids

Inclusion of supported gold nanoparticles into their semiconductor support

Germanium Sub-Microspheres Synthesized by Picosecond Pulsed Laser Melting in Liquids: Educt Size Effects

Contact Info

Product

Resources

About