DOI: 10.5281/zenodo.14512705
title: Dataset for the article "Enhanced plasmonic absorption in spontaneous nanocomplexes of metal nanoparticles with surface modified HPHT nanodiamonds"

description: Dataset for the article "Enhanced plasmonic absorption in spontaneous nanocomplexes of metal nanoparticles with surface modified HPHT nanodiamonds"

Vendula Hrnčířová1, Markéta Šlapal Bařinková1, Muhammad Qamar1, Kateřina Kolářová2, Štěpán Stehlík2, Bohuslav Rezek1

1 Faculty of Electrical Engineering, Czech Technical University in Prague, Technická 2, 166 27, Prague, Czechia

2 Institute of Physics of the Czech Academy of Sciences, Cukrovarnická 10, 162 00 Prague 6, Czechia

fig1b.png - A photo of the well-plate containing pristine colloids and colloidal mixtures.fig1c.xlsx - Absorption spectra of nanodiamonds and metal nanoparticles. (Column 1) wavelength, (A1 - A3) Au45 - triplicate of gold nanoparticles 45 μg/mL, (A4 - A6) Ag18 - triplicate of silver nanoparticles 18 μg/mL, (B1 - B3) Au22.5 - triplicate of gold nanoparticles 22.5 μg/mL, (B4 - B6) Ag9 - triplicate of silver nanoparticles 9 μg/mL, (C1 - C3) Au11.25 - triplicate of gold nanoparticles 11.25 μg/mL, (C4 - C6) Ag4.5 - triplicate of silver nanoparticles 4.5 μg/mL, (D1 - D3) Au5.625 - triplicate of gold nanoparticles 5.625 μg/mL, (D4 - D6) Ag2.25 - triplicate of silver nanoparticles 2.25 μg/mL, (E1 - E3) HND25 - triplicate of hydrogenated nanodiamonds 25 μg/mL, (E4 - E6) OND25 - triplicate of oxidized nanodiamonds 25 μg/mL, (F1 - F3) HND6 - triplicate of hydrogenated nanodiamonds 6.25 μg/mL, (F4 - F6) OND6 - triplicate of oxidized nanodiamonds 6.25 μg/mL, (G1 - G6) blank sample (water).fig1d.png - Image of electromagnetic field intensity computed by COMSOL RF Module simulations of 50 nm conductive diamond (10^-5 S/cm) measured at 522 nm in water.fig1e.png - Image of electromagnetic field intensity computed by COMSOL RF Module simulations of 20 nm gold particle measured at 522 nm in water.fig1f.png - Image of electromagnetic field intensity computed by COMSOL RF Module simulations of nanocomplex of 20 nm gold particle and 50 nm diamond (10^-5 S/cm) with 5 nm gap measured at 522 nm in water.

fig2.xlsx - Absorption spectra of colloidal mixtures (all measured in triplicate) of surface modified nanodiamonds and metal nanoparticles optical absorption spectra. (Column 1) Wavelength, (X1 - X3) AuHND25 - mixture of gold nanoparticles (X: A - 45 μg/mL, B - 22.5 μg/mL, C - 11.25 μg/mL, D - 5.625 μg/mL) and hydrogenated nanodiamonds with a concentration of 25 μg/mL, (X4 - X6) AgHND25 - mixture of silver nanoparticles (X: A - 18 μg/mL, B - 9 μg/mL, C - 4.5 μg/mL, D - 2.25 μg/mL) and hydrogenated nanodiamonds with a concentration of 25 μg/mL, (X7 - X9) AuOND25 - mixture of gold nanoparticles (X: A - 45 μg/mL, B - 22.5 μg/mL, C - 11.25 μg/mL, D - 5.625 μg/mL) and oxidized nanodiamonds with a concentration of 25 μg/mL, (X10 - X12) AgOND25 - mixture of silver nanoparticles (X: A - 18 μg/mL, B - 9 μg/mL, C - 4.5 μg/mL, D - 2.25 μg/mL) and oxidized nanodiamonds with a concentration of 25 μg/mL, (X12 - X14) AuHND6 - mixture of gold nanoparticles (X: A - 45 μg/mL, B - 22.5 μg/mL, C - 11.25 μg/mL, D - 5.625 μg/mL) and hydrogenated nanodiamonds with a concentraion of 6.25 μg/mL, (X15 - X17) AgHND6 - mixture of silver nanoparticles (X: A - 18 μg/mL, B - 9 μg/mL, C - 4.5 μg/mL, D - 2.25 μg/mL) and hydrogenated nanodiamonds with a concentration of 6.25 μg/mL, (X18 - X21) AuOND6 - mixture of gold nanoparticles (X: A - 45 μg/mL, B - 22.5 μg/mL, C - 11.25 μg/mL, D - 5.625 μg/mL) and oxidized nanodiamonds with a concentration of 6.25 μg/mL, (X22 - X24) AgOND6 - mixture of silver nanoparticles (X: A - 18 μg/mL, B - 9 μg/mL, C - 4.5 μg/mL, D - 2.25 μg/mL) and oxidized nanodiamonds with a concentration of 6.25 μg/mL, (E1 - E6) blank sample (water).

fig3a.tif - SEM micrograph of AgHND25. (left) - from secondary electrons, (right) - from back-scattered electrons.fig3b.tif - SEM micrograph of AuHND25. (left) - from secondary electrons, (right) - from back-scattered electrons.fig3c.tif - SEM micrograph of AgOND25. (left) - from secondary electrons, (right) - from back-scattered electrons.fig3d.tif - SEM micrograph of AuOND25. (left) - from secondary electrons, (right) - from back-scattered electrons.fig3f.xlsx - Optical absorption of colloidal mixtures at time zero (Sheet time zero) and after 24 hours (Sheet 24 hours). (Column 1) wavelength, (X1 - X3) AuHND25 - triplicate of gold nanoparticles and hydrogenated nanodiamonds 25 μg/mL (X: A - 45 μg/mL, B - 22.5 μg/mL, C - 11.25 μg/mL, D - 5.625 μg/mL), (X4 - X6) AgHND25 - triplicate of silver nanoparticles and hydrogenated nanodiamonds 25 μg/mL (X: A - 18 μg/mL, B - 9 μg/mL, C - 4.5 μg/mL, D - 2.25 μg/mL), (X7 - X9) AuOND25 - triplicate of gold nanoparticles and oxidized nanodiamonds 25 μg/mL (X: A - 45 μg/mL, B - 22.5 μg/mL, C - 11.25 μg/mL, D - 5.625 μg/mL), (X10 - X12) AgOND25 - triplicate of silver nanoparticles and oxidized nanodiamonds 25 μg/mL (X: A - 18 μg/mL, B - 9 μg/mL, C - 4.5 μg/mL, D - 2.25 μg/mL), (E1 - E6) blank sample (water).

fig6b.xlsx - Absorption spectra showing differences between plasmonic models with and without ND (50 nm) in the centre with varying numbers of mNPs (20 nm). Sheet AgNPs - simulations of model with silver nanoparticles. Sheet AuNPs - simulations of model with gold nanoparticles. X1 - complex with non-conductive nanodiamond (10^-15 S/cm) in the centre, X2 - complex without nanodiamond in the centre, X3 - complex with conductive nanodiamond (10^-5 S/cm) in the centre. (X: A - 2 particles, B - 4 particles, C - 6 particles, D - 8 particles, E - 10 particles, F - 12 particles, G - 14 metal particles).  fig6d.png - Simulation of the electromagnetic field of nanocomplex of 14 silver nanoparticles around a conductive nanodiamond (10^-5 S/cm) in water at 396 nm.

fig7a.xlsx - Electromagnetic field of particle dimers gained from RF Module COMSOL with varying distance between them from 5 nm to contact observed in water. Sheet AgNP - gold nanoparticles, Sheet AuNP - silver nanoparticles. X1 - distances between two metal nanoparticles, X2 - distances between metal nanoparticle and nanodiamond. A - 0 nm, B - 1 nm, C - 2 nm, D - 3 nm, E - 4 nm, F - 5 nm.

fig8.png - Simulation of the electromagnetic field of nanocomplex of 14 gold nanoparticles around a conductive nanodiamond (10^-5 S/cm) in water at 522 nm.

table1.pdf - Results of DLS analysis of the employed colloidal nanoparticles and resulting nanocomplexes: mean size (from number distribution), pH, and zeta potential. Concentrations for colloidal mixtures denote concentration ofmNPs in the mixtures with the fixed ND concentration of 25 μg/mL.

Combination of nanodiamonds with plasmonic metal particles is being explored for synergic effects that can enhance biosensing and antibacterial treatments, energy harvesting, photocatalysis, and quantum centers. Here we systematically investigate formation and plasmonic properties of complexes assembled in colloidal mixtures of 20 nm gold or silver nanoparticles with 50 nm HPHT nanodiamonds, surface of which is oxidized or hydrogenated and thereby providing well-defined particles with different surface chemistry and electrical conductivity. Nanoscale complexes are formed in each case, as shown by scanning electron microscopy and optical absorption spectra. Stable plasmonic frequency shows that the metal nanoparticles do not become aggregated and keep also a few nm gap to nanodiamonds. Concentration dependence study reveals that plasmonic effect can be significantly increased up to 124% for lower concentrations of metal nanoparticles in the mixtures whereas their higher concentrations reduce it, regardless of the type of nanodiamonds or metal nanoparticles. Based on the experimental results and electromagnetic field-based simulations of the complexes we discuss a model involving competing charge transfer and plasmonic interference effects.