Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 6, Issue 6, Pages 3915-3922Publisher
AMER CHEMICAL SOC
DOI: 10.1021/am4050184
Keywords
Molybdenum oxide; localized surface plasmon resonance; photothermal; morphology-controlled
Funding
- National Natural Science Foundation of China [21171035, 51302035]
- Key Grant Project of Chinese Ministry of Education [313015]
- PhD Programs Foundation of the Ministry of Education of China [20110075110008, 20130075120001]
- National 863 Program of China [2013AA031903]
- Science and Technology Commission of Shanghai Municipality [13ZR1451200]
- Fundamental Research Funds for the Central Universities
- Hong Kong Scholars Program
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1221]
- Shanghai Leading Academic Discipline Project [B603]
- Program of Introducing Talents of Discipline to Universities [111-2-04]
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The molybdenum oxide nanosheets have shown strong localized surface plasmon resonance (LSPR) absorption in the near-infrared (NIR) region. However, the long alky chains of ligands made them hydrophobic and less biocompatible. To, meet the requirements of molybdenum based nanomaterials for use as a future photothermal therapy, a simple hydrothermal route has been developed for hydrophilic molybdenum oxide nanospheres and nanoribbons using a molybdenum precursor and poly(ethylene glycol) (PEG). First, molybdenum oxide nanomaterials prepared in the presence of PEG exhibit strong localized surface plasmon resonance (LSPR) absorption in near-infrared (NIR) region, compared with that of no PEG. Second, elevation of synthetic temperature leads to a gradual transformation of molybdenum oxide nanospheres into nanoribbons, entailing the evolution of an intense LSPR absorption in the NIR region. Third, as-prepared molybdenum oxide nanomaterials coated with PEG possess a hydrophilic property and thus can be directly used for biological applications without additional post treatments. Moreover, molybdenum oxide nanoribbons as a model of photothermal materials can efficiently convert the 980 nm wavelength laser energy into heat energy, and this localized hyperthermia produces the effective thermal ablation of cancer cells, meaning a potential photothermal material.
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