Fabrication of oxidation-resistant Ge colloidal nanoparticles by pulsed laser ablation in aqueous HCl

Hamanaka, Yasushi; Iwata, Masahiro; Katsuno, Junichi

doi:10.1007/s00339-017-1044-9

Cited by 3 publications

(4 citation statements)

References 29 publications

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“…Within the scope of alkaline earth metals, only LAL of Mg has been studied. For main group metals, many studies focused on LAL of Al, Bi, Sn [43][44][45][46][47][48][49][50][51][52][53][54][55][56][57], and Ge [58][59][60][61][62][63][64][65][66][67], but few reports are available on Sb [68][69][70], In [71,72], and Pb [73,74]. Transition metals are most frequently investigated for LSPC, which can be transformed into different phases of metals, oxides, sulfides, nitrides, carbides, hydroxides, and metal-polymer composites via reactive laser ablation in liquids (RLAL).…”

Section: -2mentioning

confidence: 99%

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Zhang

Liang

2022

Sci. China Phys. Mech. Astron.

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Diverse nanomaterials, in the forms of carbides, sulfides, oxides, metals, hydroxides, etc., have been synthesized by laser ablation in liquids (LAL) with metal targets as the dominant educts. Many advantages of LAL technique itself and its products have been revealed since 1983 when the first report about LAL was released. Different from traditional wet-chemical synthesis, one unique feature of LAL is its resultant extreme high-temperature and high-pressure local environment for the nucleation and growth of nanomaterials, despite being performed at room temperature. This extreme condition can induce the atomization and ionization of the target materials and liquid molecules to incur different chemical reactions. The laser, liquid, liquid additive, and target can significantly alter the local environment in a broad range. Thus, different phases and shapes of nanomaterials are producible even from the same target. Through directly comparing the products of LAL of 13 kinds of chosen representative metals synthesized under different conditions, this review presents and discusses current understandings, challenging issues, and perspectives related to the diversity of LAL-products, which is willing to promote a deeper investigation and discussion on a clear clarification of the chemical reactions and particle nucleation/growth processes.

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Section: -2mentioning

confidence: 99%

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Zhang

Liang

2022

Sci. China Phys. Mech. Astron.

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“…The particle size distribution followed a lognormal distribution, with a mean diameter of (67 ± 28) nm (Figure 1b ). It is worth noting that the high‐power laser ablation in the femtosecond pulsed regime yielded Ge particle size distribution larger than that produced by the laser ablation operated in the nanosecond (8–18 nm) [ 23 ] and picosecond (3–43 nm) [ 19 , 24 ] pulsed regimes.…”

Section: Resultsmentioning

confidence: 99%

“…The degradation of Ge NPs in aqueous solutions has been reported to proceed through an oxidation mechanism. [ 13 , 19 ] We investigated the dissolution of Ge NPs in water and buffers, which simulated relevant physiological environments. [ 27 ] Ge NPs were incubated in solutions in 100 mg L −1 concentration at room temperature and Ge quantities were measured at several time points by means of inductively coupled plasma mass‐spectrometry (ICP‐MS).…”

Section: Resultsmentioning

confidence: 99%

“…[ 17 ] It is not surprising that a direct comparison of the dissolution rates of crystalline Si and Ge materials shows the faster dissolution of Germanium. [ 18 ] A range of Germanium‐based nanomaterials was reported to degrade in aqueous solutions, including elemental Ge nanoparticles (Ge NPs), [ 14 , 19 ] GeH, and GeP nanosheets. [ 20 , 21 ] In most cases, surface erosion accompanied with Germanium oxygenation has been observed.…”

Section: Introductionmentioning

confidence: 99%

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Laser‐Synthesized Germanium Nanoparticles as Biodegradable Material for Near‐Infrared Photoacoustic Imaging and Cancer Phototherapy

Belyaev,

Zelepukin,

Kotelnikova

et al. 2024

Advanced Science

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Biodegradable nanomaterials can significantly improve the safety profile of nanomedicine. Germanium nanoparticles (Ge NPs) with a safe biodegradation pathway are developed as efficient photothermal converters for biomedical applications. Ge NPs synthesized by femtosecond‐laser ablation in liquids rapidly dissolve in physiological‐like environment through the oxidation mechanism. The biodegradation of Ge nanoparticles is preserved in tumor cells in vitro and in normal tissues in mice with a half‐life as short as 3.5 days. Biocompatibility of Ge NPs is confirmed in vivo by hematological, biochemical, and histological analyses. Strong optical absorption of Ge in the near‐infrared spectral range enables photothermal treatment of engrafted tumors in vivo, following intravenous injection of Ge NPs. The photothermal therapy results in a 3.9‐fold reduction of the EMT6/P adenocarcinoma tumor growth with significant prolongation of the mice survival. Excellent mass‐extinction of Ge NPs (7.9 L g−1 cm−1 at 808 nm) enables photoacoustic imaging of bones and tumors, following intravenous and intratumoral administrations of the nanomaterial. As such, strongly absorbing near‐infrared‐light biodegradable Ge nanomaterial holds promise for advanced theranostics.

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Laser ablation in liquids for nanomaterial synthesis: diversities of targets and liquids

Zhang

Sugioka

2021

J. Phys. Photonics

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The demand is growing for new nanoscience-based technologies with unique properties that are different from traditional wet-chemical techniques. In recent years, laser ablation in liquid (LAL) has attracted increasing attention for nanomaterial synthesis, which has rapidly advanced both fundamental research and applications. Compared to other techniques, LAL is easy to set up and simple to perform. A large diversity of bulk and powder targets can be employed for LAL, which combined with an enormous variety of liquids, greatly diversify the nanomaterials that can be synthesized by LAL in terms of size, composition, shape, and structure. Although many reviews related to LAL have been published, a comprehensively thorough introduction that deals with the diversity of the targets and liquids used for LAL is still missing. To fill this gap, this review gives a comprehensive summary of the nanomaterials synthesized by LAL using different types of target and liquid, with an emphasis on the effects of liquids on the final nanoproducts. In order to provide a better understanding of the liquids’ effects, this review also discusses liquid additives such as salts, polymers, support materials, and their mixtures. Since many reactions occur during LAL, the scope of reactive laser ablation in liquid (RLAL) is redefined, and the representative reactions for each type of liquid used for LAL are summarized and highlighted. Consequently, this review will be a useful guide for researchers developing desirable nanomaterials via LAL.

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Fabrication of oxidation-resistant Ge colloidal nanoparticles by pulsed laser ablation in aqueous HCl

Cited by 3 publications

References 29 publications

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Diverse nanomaterials synthesized by laser ablation of pure metals in liquids

Laser‐Synthesized Germanium Nanoparticles as Biodegradable Material for Near‐Infrared Photoacoustic Imaging and Cancer Phototherapy

Laser ablation in liquids for nanomaterial synthesis: diversities of targets and liquids

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