Engineering miniature gold nanorods with tailorable plasmonic wavelength in NIR region via ternary surfactants mediated growth

Luo, Xiaoning; Wang, Xiaoyuan; Zhang, Lingli; Song, Liping; Sun, Zhiwei; Zhao, Yu; Su, Fengmei; Huang, Youju

doi:10.1007/s12274-022-5214-5

Cited by 14 publications

(10 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To dope Au into the crystal structure of FeCo, one main synthetic parameter was adjusted: time of injection. In typical hot injection/thermal decomposition synthetic routes, Fe and Co organometallic precursors , typically in the form of carbonylsare added and allowed to mix under high temperature and then later a fatty acidOA in this caseis added to stabilize the particle and direct the morphological growth as is typically seen in nanoparticle syntheses. , Under this high temperature, the Fe and Co carbonyl compounds undergo thermal decomposition to begin forming Fe and Co nucleating points and eventually small FeCo clusters capped by the fatty acid and other surfactants to stabilize the monomers . However, because of the low standard reduction potentials of Fe 2+ /Fe (−0.45 V vs SHE) and Co 2+ /Co (−0.28 V vs SHE), this nucleation process and the reduction of the metals from carbonyl to cluster is limited by the slow reduction into monomers.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Magnetoplasmonic Air-Stable Au@FeCo

et al. 2023

View full text Add to dashboard Cite

The synthesis of FeCo alloys as highly magnetic nanoparticles has been valuable, as far as applications for magnetic nanoparticles are concerned. However, recently, a field of magnetoplasmonics in which magnetic nanoparticles such as the FeCo alloys doped with plasmonic materials such as Au and Ag to create a hybrid nanostructure with both properties has emerged. These magnetoplasmonic metamaterials have greatly enhanced the limit of detection of analytes in spectroscopic methods, as well as providing a more widely applicable nanoparticle to broaden the use of FeCo alloys even further. Herein, we discuss the synthesis of high-yield and fairly monodisperse spherical FeCo and Au-doped FeCo (Au@FeCo) with varying compositions of Au synthesized via the thermal decomposition of iron pentacarbonyl (Fe(CO) 5 ) and dicobalt octacarbonyl (Co 2 (CO) 8 ), followed by the addition of Au atoms using triphenylphosphine gold(I) chloride ((Ph 3 P)AuCl) via both coprecipitation and by delayed addition methods. The products were separated using a hand-held magnet, and then characterized via ultraviolet−visible light (UV-vis), scanning electron microscopy coupled with energy-dispersive X-ray analysis (SEM-EDX), high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), flame atomic absorption spectrometry (F-AAS), and magnetization measurements. Optical studies revealed a plasmonic peak at 550 nm in the Au@FeCo nanoparticles that had a gold content (%Au) of >2% (by weight), determined using F-AAS. Colocation of the Fe, Co, and Au were demonstrated through EDX analysis. Location of the Au atoms in the core were seen through high-resolution bright-field imaging. To understand the use of these nanoparticles for potential application in therapeutics and/or electronics, resistance measurements were performed to assess power loss as a function of frequency. We also achieved magnetization values as high as 150 emu/g and as low as 50 emu/g for gold-loaded samples based on % Au by weight. This paves the way to continue to develop magneto-plasmonic structures chemically using these synthesis strategies.

show abstract

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Magnetoplasmonic Air-Stable Au@FeCo

et al. 2023

View full text Add to dashboard Cite

show abstract

“…The replacement of ascorbic acid with other reducing alternatives (i.e., dopamine hydrochloride, 29−31 3aminophenol, 32 and hydroquinone (HQ) 31,33,34 ) proved to improve the conversion ratio of Au precursor and size uniformity of AuNRs. Furthermore, the micellization behavior of the cationic surfactant cetyltrimethylammonium bromide (CTAB) could be altered through the addition of certain polar organic additives (i.e., salicylic acid, 35,36 sodium oleate, 31,37 and n-decanol 38 ). This modification facilitated the growth of AuNRs with an exceptional size monodispersity and shape purity, which have ever been synthesized.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The replacement of ascorbic acid with other reducing alternatives ( i.e. , dopamine hydrochloride, − 3-aminophenol, and hydroquinone (HQ) ,, ) proved to improve the conversion ratio of Au precursor and size uniformity of AuNRs. Furthermore, the micellization behavior of the cationic surfactant cetyltrimethylammonium bromide (CTAB) could be altered through the addition of certain polar organic additives ( i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the micellization behavior of the cationic surfactant cetyltrimethylammonium bromide (CTAB) could be altered through the addition of certain polar organic additives ( i.e. , salicylic acid, , sodium oleate, , and n -decanol). This modification facilitated the growth of AuNRs with an exceptional size monodispersity and shape purity, which have ever been synthesized.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Precise Tailoring of Mesoporous Silica-Coated Gold Nanorods for Laser Ignition at 1064 nm

Sheng

et al. 2023

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

The plasmon-induced photothermal effect is often regarded as one of the most intriguing features of Au nanorods (AuNRs). The spectral matching of absorption and excitation determines the optical absorption quantity and the photothermal conversion efficiency, which is essential for practical applications. Although the dimensional tunability of monodisperse AuNRs has already been accessible, the fine-tuning of AuNRs with longitudinal surface plasmon resonance (LSPR) at a desired wavelength to match the excitation is still challenging because of inferior reproducibility and synthetic complexity. In this work, using hydroquinone as both a cosurfactant and a reductant, we propose a synthetic strategy toward AuNRs with excellent linear tunability of LSPR peaks from 530 to 1200 nm via simply altering the dosage of silver nitrate. Given that the laser wavelength for ignition is 1064 nm, the LSPR wavelength of AuNRs could be exactly controlled at 1064 nm for maximum photothermal performance. Afterward, the as-prepared AuNRs were coated with a dendritic mesoporous silica shell for plasmonic stability and loading explosive molecules. As a proof of concept, the laser ignitability could be achieved only in the presence of AuNRs with LSPR wavelength approaching 1064 nm, highlighting the importance of spectral matching in photothermal conversion-assisted laser ignition.

show abstract

“…[20] Nevertheless, previous studies are only restricted to the near-filed enhancement and plasmon-enhanced biosensing such as surface-enhanced Raman spectroscopy (SERS). [30][31][32][33] As is well-known, the plasmonic (extinction) characteristics of spiky Au NPs are the combination of their optical absorption and scattering effects, which exhibit distinct dependence on the geometric parameters. For instance, the maximal plasmon resonance wavelength of spiky Au NPs redshifts progressively with the increasing total size and aspect ratio of the spikes, but the absorption and scattering cross-sections are proportional to the total volume (V) and the square of the total volume (V 2 ) of the NPs, respectively.…”

Section: Introductionmentioning

confidence: 99%

Engineering Near‐Infrared Plasmonic Spiky Gold Nanostructures for Highly Efficient Surface‐Enhanced Raman Spectroscopy‐Guided Cancer Hyperthermia Therapy

Jiang,

Li,

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Cancer phototheranostics utilizing plasmonic materials is attracting considerable interest due to its high spatiotemporal precision and specificity, remote controllability, superior therapeutic efficacy, and low systemic side effects. Exploring new plasmonic materials with excellent plasmonic and photothermal properties is at the frontier of cancer phototheranostics. Herein, this work systematically investigates the plasmonic and photothermal properties of spiky Au nanoparticles (NPs) with different shaped central cores – spiky Au nanosphere , spiky Au nanocube and spiky Au nanorod (AuNR). It is shown that the shape of the central core in spiky Au NPs has significant effects on their surface‐enhanced Raman spectroscopy (SERS) and photothermal performances, and spiky Au NPs of a spherical or cubic core are much superior for near‐infrared (NIR) SERS detection and hyperthermia therapy in comparison with spiky AuNRs. The spiky Au NP‐based SERS probes demonstrate the remarkable capability for SERS imaging of live cells and dynamic visualization of tumors in a 4T1 breast tumor mouse model after intravenous administration. Moreover, in vivo studies show exceptional hyperthermia therapeutic effects of such SERS probes against 4T1 breast tumors under NIR irradiation. This study suggests the potential utility of spiky Au NP‐based SERS probes for efficient SERS‐guided cancer hyperthermia therapy.

show abstract

Engineering miniature gold nanorods with tailorable plasmonic wavelength in NIR region via ternary surfactants mediated growth

Cited by 14 publications

References 58 publications

Synthesis and Characterization of Magnetoplasmonic Air-Stable Au@FeCo

Synthesis and Characterization of Magnetoplasmonic Air-Stable Au@FeCo

Precise Tailoring of Mesoporous Silica-Coated Gold Nanorods for Laser Ignition at 1064 nm

Engineering Near‐Infrared Plasmonic Spiky Gold Nanostructures for Highly Efficient Surface‐Enhanced Raman Spectroscopy‐Guided Cancer Hyperthermia Therapy

Contact Info

Product

Resources

About