Effects of long wavelength ultraviolet A and visible light on dark skin

Carbon dots (CDs) with a room temperature phosphorescent (RTP) feature have attracted considerable interest in recent years due to their fundamental importance and promising applications. However, the reported matrix-free RTP CDs only show short-wavelength (green to yellow) emissions and have to be triggered by ultraviolet (UV) light (below 400 nm), limiting their applications in certain fields. Herein, visible-light-excited matrix-free RTP CDs (named AA-CDs) with a long-wavelength (orange) emission are reported for the first time. The AA-CDs can be facilely prepared via a microwave heating treatment of L-aspartic acid (AA) in the presence of ammonia and they emit unique orange RTP in the solid state with visible light (420 nm) excitation just being switched off. Through the studies of the carbonization process, the C=O and C=N containing moieties in the AA-CDs are confirmed to be responsible for the observed RTP emission. Finally, the applications of AA-CDs in information encryption and anti-counterfeiting were preliminarily demonstrated.

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1167 The impact of trace amounts of long wavelength UVA1 on visible light induced effects

Journal of Investigative Dermatology ◽

10.1016/j.jid.2018.03.1181 ◽

2018 ◽

Vol 138 (5) ◽

pp. S198

Author(s):

I. Kohli ◽

T.L. Braunberger ◽

A.F. Nahhas ◽

N. Kollias ◽

E. Ruvolo ◽

...

Keyword(s):

Visible Light ◽

Long Wavelength ◽

The Impact

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Synergistic effects of long-wavelength ultraviolet A1 and visible light on pigmentation and erythema

British Journal of Dermatology ◽

10.1111/bjd.15940 ◽

2018 ◽

Vol 178 (5) ◽

pp. 1173-1180 ◽

Cited By ~ 24

Author(s):

I. Kohli ◽

S. Chaowattanapanit ◽

T.F. Mohammad ◽

C.L. Nicholson ◽

S. Fatima ◽

...

Keyword(s):

Visible Light ◽

Synergistic Effects ◽

Long Wavelength

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Inactivation of viruses in platelet suspensions that retain their in vitro characteristics: comparison of psoralen-ultraviolet A and merocyanine 540-visible light methods

Transfusion ◽

10.1046/j.1537-2995.1991.31691306242.x ◽

1991 ◽

Vol 31 (6) ◽

pp. 483-490 ◽

Cited By ~ 45

Author(s):

RY Dodd ◽

G Moroff ◽

S Wagner ◽

MH Dabay ◽

E Dorfman ◽

...

Keyword(s):

Visible Light ◽

Ultraviolet A ◽

Merocyanine 540

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Long-wavelength ultraviolet A (UVA-1) phototherapy for the treatment of patients with atopic dermatitis

Vestnik dermatologii i venerologii ◽

10.25208/vdv1286 ◽

2021 ◽

Vol 97 (5) ◽

pp. 26-37

Author(s):

A. E. Karamova ◽

V. V. Chikin ◽

A. A. Kubanov ◽

L. K. Davletbaeva

Keyword(s):

Atopic Dermatitis ◽

Drug Therapy ◽

Side Effects ◽

Radiation Dose ◽

Mechanisms Of Action ◽

Severe Atopic Dermatitis ◽

Ultraviolet A ◽

Long Wavelength ◽

Discontinuation Of Treatment ◽

Skin Phototype

One of the methods of therapy for atopic dermatitis is long-wavelength ultraviolet therapy A (UVA-1- therapy). This review aims to provide the mechanisms of action of UVA-1-therapy an overview about the effectiveness of UVA-1-therapy in patients with atopic dermatitis taking into account factors that can affect the effectiveness of treatment radiation dose, skin phototype of patients, concomitant drug therapy. The available data on a decrease in the severity of atopic dermatitis as a result of the course of UVA-1-therapy and on a decrease in the severity of itching in patients are presented. The data on the rate of onset of the therapeutic effect of UVA-1-therapy and the duration of its maintenance are considered. The safety of UVA-1-therapy is discussed, and the most frequent undesirable effects a feeling of warmth, fever, itching, hyperpigmentation, are given. The possibility of developing side effects requiring discontinuation of treatment is assessed. The data obtained indicate the effectiveness and safety of the UFA-1-radiation in the treatment of patients with moderate-to-severe atopic dermatitis.

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