Stabilization of graphene quantum dots (GQDs) by encapsulation inside zeolitic imidazolate framework nanocrystals for photoluminescence tuning.
Luminescent graphene quantum dots (GQDs) are encapsulated and stabilized in Zeolitic Imidazolate Framework (ZIF-8) nanocrystals. The GQDs are well confined due to the adsorption on the growing face of the ZIF-8 nanocrystals and have a profound effect on the shape of the nanocrystals from rhombic dodecahedron to spherical. Stabilizing GQDs inside the ZIF-8 nanocrystals results in tailoring of the photoluminescence emission (ca. 32 nm, bathochromic shift) of the GQD@ZIF-8 nanocrystal composite even after 3 months of aging under normal laboratory conditions. Also the water adsorption (at STP) capacity increased for the GQD@ZIF-8 composite as compared to the pristine ZIF-8.
Physical/Materials Chemistry Division, CSIR-National Chemical Laboratory, Dr Homi Bhabha Road, Pune-411 008, India. r.banerjee@ncl.res.in.
Bishnu P
BP
Biswal
Dhanraj B
DB
Shinde
Vijayamohanan K
VK
Pillai
Rahul
R
Banerjee
D000327:Adsorption; D037741:Fullerenes / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D007093:Imidazoles / Q000737:chemistry*; D045663:Quantum Dots / Q000737:chemistry*; D013818:Thermogravimetry; D017641:Zeolites / Q000737:chemistry*
D037741:Fullerenes; D007093:Imidazoles; C530172:pristine (C60); D017641:Zeolites; D006108:Graphite