Abstract
The phase-separation on mixed-monolayer-protected metal Nanoparticles (NP) coated with mixtures of varying composition of 1-octanethiol and its fully denatured analogue (OT-d17) were analyzed by Infrared Spectroscopy (IRS) and Scanning Tunneling Microscopy (STM). The results show CH2 stretching frequencies as a function of composition for a series of NPs coated with OT and 3-mercaptopropionic acid (MPA). The intensity ratio between the antisymmetric MPA and the peaks in the entire CD stretching region of OT-d17 estimates show that the ligand-shell composition is in agreement with the syochiometric ratio used in synthesizing the NPs. The CH2 stretching frequencies versus composition provide evidence for homogeneous mixing and for phase separation in the ligand shell of monolayer-protected gold nanoparticles.
| Original language | English |
|---|---|
| Pages (from-to) | 814-817 |
| Number of pages | 4 |
| Journal | Small |
| Volume | 3 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2007 |
Fingerprint
Keywords
- IR spectroscopy
- Monolayers
- Nanoparticles
- Phase separation
- Scanning tunneling microscopy
ASJC Scopus subject areas
- Biomaterials
- Engineering (miscellaneous)
- Biotechnology
- Medicine(all)
Cite this
Phase separation on mixed-monolayer-protected metal nanoparticles : A study by infrared spectroscopy and scanning tunneling microscopy. / Centrone, Andrea; Hu, Ying; Jackson, Alicia M.; Zerbi, Giuseppe; Stellacci, Francesco.
In: Small, Vol. 3, No. 5, 05.2007, p. 814-817.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Phase separation on mixed-monolayer-protected metal nanoparticles
T2 - A study by infrared spectroscopy and scanning tunneling microscopy
AU - Centrone, Andrea
AU - Hu, Ying
AU - Jackson, Alicia M.
AU - Zerbi, Giuseppe
AU - Stellacci, Francesco
PY - 2007/5
Y1 - 2007/5
N2 - The phase-separation on mixed-monolayer-protected metal Nanoparticles (NP) coated with mixtures of varying composition of 1-octanethiol and its fully denatured analogue (OT-d17) were analyzed by Infrared Spectroscopy (IRS) and Scanning Tunneling Microscopy (STM). The results show CH2 stretching frequencies as a function of composition for a series of NPs coated with OT and 3-mercaptopropionic acid (MPA). The intensity ratio between the antisymmetric MPA and the peaks in the entire CD stretching region of OT-d17 estimates show that the ligand-shell composition is in agreement with the syochiometric ratio used in synthesizing the NPs. The CH2 stretching frequencies versus composition provide evidence for homogeneous mixing and for phase separation in the ligand shell of monolayer-protected gold nanoparticles.
AB - The phase-separation on mixed-monolayer-protected metal Nanoparticles (NP) coated with mixtures of varying composition of 1-octanethiol and its fully denatured analogue (OT-d17) were analyzed by Infrared Spectroscopy (IRS) and Scanning Tunneling Microscopy (STM). The results show CH2 stretching frequencies as a function of composition for a series of NPs coated with OT and 3-mercaptopropionic acid (MPA). The intensity ratio between the antisymmetric MPA and the peaks in the entire CD stretching region of OT-d17 estimates show that the ligand-shell composition is in agreement with the syochiometric ratio used in synthesizing the NPs. The CH2 stretching frequencies versus composition provide evidence for homogeneous mixing and for phase separation in the ligand shell of monolayer-protected gold nanoparticles.
KW - IR spectroscopy
KW - Monolayers
KW - Nanoparticles
KW - Phase separation
KW - Scanning tunneling microscopy
UR - http://www.scopus.com/inward/record.url?scp=34248582553&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=34248582553&partnerID=8YFLogxK
U2 - 10.1002/smll.200600736
DO - 10.1002/smll.200600736
M3 - Article
C2 - 17410617
AN - SCOPUS:34248582553
VL - 3
SP - 814
EP - 817
JO - Small
JF - Small
SN - 1613-6810
IS - 5
ER -