Upconversion nanoparticles coated organic photovoltaics for near infrared light controlled drug delivery systems

Loading and Release of Charged and Neutral Fluorescent Dyes into and from Mesoporous Materials: A Key Role for Sensing Applications

“…It is currently even employed to combat the viral SARS-CoV-2 pandemic [2]. However, in the last years the scope of this technology has been expanded toward applications in a variety of sectors such as agriculture [3,4], photovoltaic cells [5] external coatings [6] or personal care and cosmetics [7], employing as nanoparticles drug carriers (NPs) of organic [8][9][10] or inorganic [11] nature. Among these materials, microporous and mesoporous materials, due to their chemical inertness, homogeneous porosity and large internal surface area, have attracted considerable research interest for applications on the fields of drug delivery [12][13][14], catalysis [15][16][17], filtration and separation [18,19], gas adsorption [20,21] and storage [22,23], enzyme immobilisation [24,25], biomedical tissue regeneration [26,27], environmental remediation [28][29][30], chemical/biochemical sensing [31][32][33] and theranostics [34,35] mostly as nano-or microparticles, but also in core/shell formats or in combination with other properties such as magnetic ones [36,37].…”

Multispectral upconversion nanoparticles for near infrared encoding of wearable devices

“…NaYbF 4 :Er 3+ ,Tm 3+ (69% Yb 3+ , 30% Er 3+ and 1% Tm 3+ molar ratio), NaYF 4 :Yb 3+ ,Er 3+ (78% Y 3+ , 20% Yb 3+ and 2% Er 3+ molar ratio), NaYF 4 :Yb 3+ ,Tm 3+ (79.5% Y 3+ , 20% Yb 3+ and 0.5% Tm 3+ molar ratio) core nanoparticles were synthesized as reported elsewhere. 32,40 One mmol LnCl 3 (Ln:Y, Yb, Tm, Er as above ratio) was dissolved in 5 mL methanol in a 250 mL three-necked flask, which was mixed with a magnetic stirrer to evaporate methanol at 70 °C. After evaporating methanol completely, 6 mL OA and 15 mL ODE were added into the flask.…”

“…UCNPs@NaYF 4 core–shell nanoparticles were synthesized as reported elsewhere. 32,40 One half mmol of YCl 3 was dissolved in 5 mL methanol in a three-necked 250 mL flask, which was mixed with a magnetic stirrer to evaporate methanol at 70 °C. After evaporating methanol completely, 6 mL OA and 15 mL ODE were added into the flask.…”

“…13 Especially, upconversion nanoparticles (UCNPs) are a remarkable platform as information carriers due to their unique luminescent properties such as photon upconversion with large anti-Stokes shis, broad-spectrum, biocompatibility, ease of multifunctionality, facile size and phase tunability, and satisfactory signal output. [14][15][16][17][18][19][20][21][22][23] UCNPs have been harnessed for photomedicine, [24][25][26][27] multimodal bioimaging, [28][29][30] biomedical device, 31,32 molecular sensing, 33 and optical security. 34 Here, we designed multispectral transparent lms of UCNPs for simple, fast, reproducible, and highly robust near-infrared (NIR) encoding of wearable devices including contact lens and patch devices.…”

“…3+ and 0.5% Tm 3+ molar ratio) core nanoparticles were synthesized as reported elsewhere. 32,40 One mmol LnCl 3 (Ln:Y, Yb, Tm, Er as above ratio) was dissolved in 5 mL methanol in a 250 mL three-necked ask, which was mixed with a magnetic stirrer to evaporate methanol at 70 C. Aer evaporating methanol completely, 6 mL OA and 15 mL ODE were added into the ask. The mixture was heated up at 110 C for 10 min to evaporate the remaining water under N 2 gas ow.…”