PMID- 25958559
OWN - NLM
STAT- MEDLINE
DCOM- 20150716
LR  - 20190715
IS  - 1533-4880 (Print)
IS  - 1533-4880 (Linking)
VI  - 14
IP  - 11
DP  - 2014 Nov
TI  - Preparation and characterization of thin silicate-coated fluorescent silica 
      nanoparticles with enhanced stability.
PG  - 8539-43
AB  - Silica nanoparticles (SNPs) were functionalized by aminosilanes of different 
      chain lengths, such as (3-aminopropyl) trimethoxysilane (APTMS), 
      [3-(2-aminoethylamino)propyl] trimethoxysilane (AEAPTMS), and 
      N-(3-trimethoxysilylpropyl)diethylenetriamine (TMSP), followed by the 
      electrostatic conjugation with carboxyl quantum dots (QDs). The resulting 
      QD-anchored SNPs (Q-SNPs) were treated with a silicate solution to afford thin 
      silica-coated fluorescent nanoparticles. The Q-SNPs prepared using AEAPTMS 
      exhibited the highest photoluminescence (PL) intensity compared to those prepared 
      using APTMS and TMSP. Moreover, the conjugation of amine-terminated SNPs with 
      carboxyl QDs was found to be very strong under acidic pH conditions. The 
      silicate-coated Q-SNPs exhibited a long-lasting PL intensity compared to the 
      pristine Q-SNPs because the silica coating prevented the oxidative degradation 
      and/or detachment of the anchored QDs from the SNPs. Such a protective coating 
      strategy would be a useful guideline to prepare stable nanostructured materials 
      for prolonged applications. The composite particles were characterized by 
      scanning electron microscopy (SEM), transmission electron microscopy (TEM), 
      dynamic light scattering (DLS), and photoluminescence (PL) spectroscopy.
FAU - Yoo, Jihye
AU  - Yoo J
FAU - Lee, Sang-Wha
AU  - Lee SW
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Nanosci Nanotechnol
JT  - Journal of nanoscience and nanotechnology
JID - 101088195
RN  - 0 (Fluorescent Dyes)
RN  - 0 (N-(3-trimethoxysilylpropyl)diethylenetriamine)
RN  - 0 (Organosilicon Compounds)
RN  - 0 (Polyamines)
RN  - 0 (Silanes)
RN  - 0 (Silicates)
RN  - V1J39XPF91 (trimethoxysilane)
SB  - IM
MH  - Fluorescent Dyes/*chemistry
MH  - Nanoparticles/*chemistry
MH  - Nanotechnology
MH  - Organosilicon Compounds/chemistry
MH  - Polyamines/chemistry
MH  - Quantum Dots/*chemistry
MH  - Silanes/*chemistry
MH  - Silicates/*chemistry
EDAT- 2015/05/12 06:00
MHDA- 2015/07/17 06:00
CRDT- 2015/05/12 06:00
PHST- 2015/05/12 06:00 [entrez]
PHST- 2015/05/12 06:00 [pubmed]
PHST- 2015/07/17 06:00 [medline]
AID - 10.1166/jnn.2014.9979 [doi]
PST - ppublish
SO  - J Nanosci Nanotechnol. 2014 Nov;14(11):8539-43. doi: 10.1166/jnn.2014.9979.