Prussian Blue Nanoparticles as a Versatile Photothermal Tool

Dacarro, Giacomo; Taglietti, Angelo; Pallavicini, Piersandro

doi:10.3390/molecules23061414

Cited by 81 publications

(67 citation statements)

References 89 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…S1; c and d) and pristine ( Fig. S1; g and h), the cuboidal nature of the PB at the 2× dipped cycles for the treated GFA3 had given way to a more spherical PBNP as earlier reported [49]. This is most likely due to clustering, which forced the shapes to morph from cubes into more irregular shapes.…”

Section: Resultssupporting

confidence: 57%

Electrochemical stability and capacitance of in-situ synthesized Prussian blue on thermally-activated graphite

et al. 2019

View full text Add to dashboard Cite

The search has been on for years to find at least, a stable, high surface area scaffold for Prussian blue (PB) and its analogs. If successful, PB's vast potential applications could be practicable. This, is besides other innate issues with PB such as poor cycle stability, low electronic conductivity to mention a few. For the first time, a stable Prussian blue@thermally activated graphite felt scaffold, with cycling stability of 2100 cycles, from − 0.5 to 1.3 V, and in 1 M KCl, for at least 36 h is reported. At the end of 2100 CV cycles, sample capacitance more than tripled (381 mF cm −2 compared to 120 mF cm −2 at start of experiment). These properties suggest a practical ion-sieve for specific cation removal from contaminated water. Two new synthesis protocols were employed to achieve this: (a) a first time, single solution PB synthesis without externally applied potential, current or even elevated temperature and (b) a two-step solution-dipping process not involving acidic conditions. PB from both protocols exhibited similar electrochemical characteristics even though the electron relay paths along their charge transfer complexes are different. When probed for its HOMO characteristics, the PB@thermally-treated graphite showed no significant electronic difference from the thermally-treated felt scaffold, suggesting non-compromise of the treated graphite by the PB. Besides cation removal, the electrochemical and electronic properties of these PB@treated graphites suggest multiple electrochemical, non-electrochemical and electronic applications with intact structural and functional integrity.

show abstract

Section: Resultssupporting

confidence: 57%

Electrochemical stability and capacitance of in-situ synthesized Prussian blue on thermally-activated graphite

et al. 2019

View full text Add to dashboard Cite

show abstract

“…As a result, they are promising agents for photothermal therapy (PTT) for the treatment of several diseases, including cancer and bacterial infections. [27][28][29] Maaoui et al reported that PB NPs coated with polyvinyl pyrrolidone (PVP), in combination with near infra-red (980 nm) laser irradiation, can be used for the robust ablation of virulent Gram positive and Gram negative bacterial strains. 30 However, mechanistic details related to their interaction with the bacterial cells were not provided.…”

Section: Introductionmentioning

confidence: 99%

Peroxidase-like behavior and photothermal effect of chitosan-coated Prussian-blue nanoparticles: dual-modality antibacterial action with enhanced bioaffinity

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Nanoparticles (NPs) capable of relaxing thermally when irradiated at the wavelength of their absorption bands add interesting photothermal properties to the many peculiarities of matter at the nanoscale. NP of this kind are made of highly absorbing substances such as Prussian Blue [1], copper sulfide [2] or, more frequently, noble metals [3]. In the latter case, the absorption bands responsible of the photothermal effect are due to the well-known phenomenon of localized surface plasmon resonance (LSPR).…”

Section: Introductionmentioning

confidence: 99%

Suitable Polymeric Coatings to Avoid Localized Surface Plasmon Resonance Hybridization in Printed Patterns of Photothermally Responsive Gold Nanoinks

et al. 2020

Self Cite

View full text Add to dashboard Cite

When using gold nanoparticle (AuNP) inks for writing photothermal readable secure information, it is of utmost importance to obtain a sharp and stable shape of the localized surface plasmon resonance (LSPR) absorption bands in the prints. The T increase at a given irradiation wavelength (ΔTλ) is the retrieved information when printed patterns are interrogated with a laser source. As ΔTλ is proportional to the absorbance at the wavelength λ, any enlargement or change of the absorbance peak shape in a printed pattern would lead to wrong or unreliable reading. With the aim of preparing AuNP inks suitable for inkjet printing of patterns with stable and reliable photothermal reading, we prepared liquid solutions of spherical AuNP coated with a series of different polymers and with or without additional dispersant. The optical stability of the inks and of the printed patterns were checked by monitoring the shape changes of the sharp LSPR absorption band of AuNP in the visible (λmax 519 nm) along weeks of ageing. AuNP coated with neutral polyethylenglycol thiols (HS-PEG) of mw 2000–20000 showed a strong tendency to rapidly agglomerate in the dry prints. The close contact between agglomerated AuNP resulted in the loss of the pristine shape of the LSPR band, that flattened and enlarged with the further appearance of a second maximum in the Near IR, due to plasmon hybridization. The tendency to agglomerate was found directly proportional to the PEG mw. Addition of the ethylcellulose (EC) dispersant to inks resulted in an even stronger and faster tendency to LSPR peak shape deformation in the prints due to EC hydrophobicity, that induced AuNP segregation and promoted agglomeration. The introduction of a charge on the AuNP coating revelead to be the correct way to avoid agglomeration and obtain printed patterns with a sharp LSPR absorption band, stable with ageing. While the use of a simple PEG thiol with a terminal negative charge, HS-PEGCOO(−) (mw 3000), was not sufficient, overcoating with the positively charged polyallylamine hydrochloride (PAH) and further overcoating with the negatively charged polystyrene sulfonate (PSS) yielded AuNP@HS-PEGCOO(−)/PAH(+) and AuNP@HS-PEGCOO(−)/PAH(+)/PSS(−), both giving stable prints. With these inks we have shown that it is possible to write photothermally readable secure information. In particular, the generation of reliable three-wavelength photothemal barcodes has been demonstrated.

show abstract

Prussian Blue Nanoparticles as a Versatile Photothermal Tool

Cited by 81 publications

References 89 publications

Electrochemical stability and capacitance of in-situ synthesized Prussian blue on thermally-activated graphite

Electrochemical stability and capacitance of in-situ synthesized Prussian blue on thermally-activated graphite

Peroxidase-like behavior and photothermal effect of chitosan-coated Prussian-blue nanoparticles: dual-modality antibacterial action with enhanced bioaffinity

Suitable Polymeric Coatings to Avoid Localized Surface Plasmon Resonance Hybridization in Printed Patterns of Photothermally Responsive Gold Nanoinks

Contact Info

Product

Resources

About