In:
Nanotechnology, IOP Publishing, Vol. 34, No. 17 ( 2023-04-23), p. 175601-
Abstract:
Near-infrared (NIR) persistent luminescence nanoparticles (PLNPs) with high brightness, small sizes, good hydro-dispersivity, and intrinsic surface-functional groups are desirable in biological applications. In this work, Cr 3+ -doped zinc gallogermanates Zn 1+ x Ga 2−2 x Ge x O 4 :Cr (ZGGC) PLNPs were hydrothermally synthesized via 3-aminopropyltriethoxysilane (APTES) as an additive, or APTES and cetyltrimethylammonium bromide (CTAB) as two co-additives. Addition of APTES not only dramatically enhances the 696 nm NIR luminescence intensity, but also obviously decreases the particle size and introduces amino groups. In particular, the x = 0.1 series ZGGC (ZGGC 0.1 ) with the addition of n moles equivalent APTES (ZGGC 0.1 -nA) had smaller particle sizes than the x = 0.2 counterpart (ZGGC 0.2 -nA). The NIR afterglow intensities increased with the APTES introduction. The ZGGC 0.2 -2.5A sample (also named as ZGGC, Si, -NH 2 ) exhibited maximum luminescence intensities both in solid and aqueous states. With APTES, Si atom is doped and –NH 2 groups are modified, the trap depth and density become larger, and the afterglow intensities and decay time are significantly enhanced. More notably, co-addition of CTAB (ZGGC 0.2 -2.5A-C) (also named as ZGGC, Si, −NH 2 ’) further enhances hydro-dispersivity and luminescence intensity, decreases particle sizes, and results in more prominent amino groups. The trap density is drastically higher than that without CTAB (i.e. ZGGC 0.2 -2.5A). Change of Cr 3+ microenvironment in the crystal and more defects introduction contribute to the enhanced brightness. As expected, the ZGGC,Si,-NH 2 ’ PLNPs possess excellent biocompatibility, deep tissue penetration and distinguished bioimaging properties, and rechargeability with orange LED light. The ZGGC,Si,-NH 2 ’ PLNPs should provide to be an excellent nanomaterial for various functionalization and bioimaging applications.
Type of Medium:
Online Resource
ISSN:
0957-4484
,
1361-6528
DOI:
10.1088/1361-6528/acb69c
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2023
detail.hit.zdb_id:
1362365-5
SSG:
11
