Authentication of a Painting by Nicolae Grigorescu Using Modern Multi-Analytical Methods

The paper presents the expertise of authenticating a painting by Nicolae Grigorescu through the involvement of multi-analytical techniques, in order to identify and evaluate some archaeometric and chemometric characteristics of the pictorial materials and of the support, used in determining the age. The painting is made with oil colors on pressed cardboard, with preparation based on chalk powder and animal glue. The painting presents two elements as being counterfeit, which have attracted suspicions, namely the signature of the author (presenting a semi-transparent covering veil), and, on the back, a writing of dating, performed by a very controversial art historian. The investigation was carried out by direct analysis with magnification devices, in reflected UV (ultraviolet), VIS (visible), and NIR (near- infrared) light, and by OM, SEM-EDX, and μ-FTIR. The results showed that the painting is authentic and belongs to Nicolae Grigorescu, and the dating established previously by Amelia Pavel through the writing on the back is certain.

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Near-infrared Light Emission from Nanomolar-level Singlet Molecular Oxygen Generated with an Ultralow Concentration Mixture of Hypochlorite and Hydrogen Peroxide

Photochemistry and Photobiology ◽

10.1562/0031-8655(1998)068<0016:nilefn>2.3.co;2 ◽

1998 ◽

Vol 68 (1) ◽

pp. 16

Author(s):

Takuo Shiraishi ◽

Masao Makiuchi ◽

Katsuko Kakinuma ◽

Humio Inaba

Keyword(s):

Hydrogen Peroxide ◽

Molecular Oxygen ◽

Near Infrared ◽

Light Emission ◽

Infrared Light ◽

Singlet Molecular Oxygen ◽

Near Infrared Light ◽

Ultralow Concentration

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An ordered copper nanowell-array film with near-perfect broadband absorption from ultraviolet to near-infrared light

Japanese Journal of Applied Physics ◽

10.35848/1347-4065/abc29e ◽

2020 ◽

Vol 59 (11) ◽

pp. 110906

Author(s):

Juan Shen ◽

Yong Ren ◽

Xinxin Zhu ◽

Min Mao ◽

Quan Zhou ◽

...

Keyword(s):

Near Infrared ◽

Infrared Light ◽

Near Infrared Light ◽

Broadband Absorption

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Recent Near-Infrared Light-Activated Nanomedicine toward Precision Cancer Therapy

Journal of Materials Chemistry B ◽

10.1039/d1tb00671a ◽

2021 ◽

Author(s):

Xiaowei Luan ◽

Yongchun Pan ◽

Yanfeng Gao ◽

Yujun Song

Keyword(s):

Cancer Therapy ◽

Near Infrared ◽

Infrared Light ◽

Human Society ◽

Near Infrared Light ◽

History Of ◽

The Universe

Light has witnessed the history of mankind and even the universe. It is of great significances to the life of human society, contributing to energy, agriculture, communication, and much more....

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Preparation and characterization of PVC / Cs x WO 3 composite film with excellent near‐infrared light shielding and high visible light transmission

Journal of Vinyl and Additive Technology ◽

10.1002/vnl.21811 ◽

2021 ◽

Author(s):

Keshun Su ◽

Zepeng Mao ◽

Zhangbin Yang ◽

Jun Zhang

Keyword(s):

Visible Light ◽

Composite Film ◽

Near Infrared ◽

Light Transmission ◽

Infrared Light ◽

Near Infrared Light

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Au–ZnO Conjugated Black Phosphorus as a Near-Infrared Light-Triggering and Recurrence-Suppressing Nanoantibiotic Platform against Staphylococcus aureus

Pharmaceutics ◽

10.3390/pharmaceutics13010052 ◽

2021 ◽

Vol 13 (1) ◽

pp. 52

Author(s):

Atanu Naskar ◽

Sohee Lee ◽

Kwang-sun Kim

Keyword(s):

Staphylococcus Aureus ◽

Bacterial Infections ◽

Near Infrared ◽

Au Nanoparticles ◽

Synthesis Method ◽

Antibacterial Properties ◽

Black Phosphorus ◽

Infrared Light ◽

Resistant Bacteria ◽

Near Infrared Light

Antibiotic therapy is the gold standard for bacterial infections treatment. However, the rapid increase in multidrug-resistant (MDR) bacterial infections and its recent use for secondary bacterial infections in many COVID-19 patients has considerably weakened its treatment efficacy. These shortcomings motivated researchers to develop new antibacterial materials, such as nanoparticle-based antibacterial platform with the ability to increase the chances of killing MDR strains and prevent their drug resistance. Herein, we report a new black phosphorus (BP)-based non-damaging near-infrared light-responsive platform conjugated with ZnO and Au nanoparticles as a synergistic antibacterial agent against Staphylococcus aureus species. First, BP nanosheets containing Au nanoparticles were assembled in situ with the ZnO nanoparticles prepared by a low-temperature solution synthesis method. Subsequently, the antibacterial activities of the resulting Au–ZnO–BP nanocomposite against the non-resistant, methicillin-resistant, and erythromycin-resistant S. aureus species were determined, after its photothermal efficacy was assessed. The synthesized nanocomposite exhibited excellent anti-S. aureus activity and good photothermal characteristics. The non-resistant S. aureus species did not produce drug-resistant bacteria after the treatment of multiple consecutive passages under the pressure of the proposed nanoantibiotic, but rapidly developed resistance to erythromycin. This work clearly demonstrates the excellent photothermal antibacterial properties of Au–ZnO–BP nanocomposite against the MDR S. aureus species.

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