Direct nanoimprinting of nanoporous organosilica films consisting of covalently crosslinked photofunctional frameworks

Nanoscale
Norihiro MizoshitaShinji Inagaki

Abstract

Nanoimprinting methods have been used widely to prepare various patterned or nanostructured thin films from inorganic or organic components. However, the accumulation of large functional aromatic groups in covalently crosslinked nanoimprints is challenging, due to the difficulty in controlling the fluidity and reactivity of the precursor films. In this work, nanoimprinting of naphthalimide-silica sol-gel films results in vertically oriented nanoporous structures consisting of covalently crosslinked UV-absorbing frameworks. The nanoimprinted films demonstrate potential as robust analytical substrates for laser desorption/ionization mass spectrometry (LDI-MS). The sol-gel polycondensation behavior of the precursors is examined using 29Si NMR spectroscopy to determine reaction conditions suitable for nanoimprinting. The inorganic-organic hybrid frameworks containing a high density of naphthalimide groups exhibit small volume shrinkage during the polycondensation reactions, which leads to desired nanoimprinting. Various bio-related compounds on the order of picomole to femtomole quantities are detectable by LDI-MS measurements using the nanoimprinted substrates. To improve their user-friendliness and signal intensity in LDI-MS anal...Continue Reading

References

Jun 21, 2002·Nature·Stephen Y ChouJian Gu
Feb 13, 2003·Chemical Reviews·Klaus Dreisewerd
May 31, 2006·Langmuir : the ACS Journal of Surfaces and Colloids·Wei ZhaoP S Suresh
Jul 11, 2006·The Journal of Physical Chemistry. B·Guanghong LuoAkos Vertes
Jan 30, 2007·Nano Letters·Keng H HsuNicholas X Fang
May 20, 2008·Journal of the American Society for Mass Spectrometry·Chun-Yuan LoYu-Chie Chen
Aug 18, 2010·Advanced Materials·Hyun Wook RoChristopher L Soles
Aug 24, 2010·Analytical and Bioanalytical Chemistry·K P Law, James R Larkin
Nov 23, 2010·Chemical Society Reviews·Cheng-Kang ChiangHuan-Tsung Chang
Feb 2, 2009·Advanced Materials·Christophe PerozElin Søndergård
Mar 22, 2014·Analytical and Bioanalytical Chemistry·Klaus Dreisewerd
Jul 16, 2014·Nanoscale Research Letters·Nazrin KooyOoi Su Guan
May 27, 2015·Nano Letters·Jorik van de GroepAlbert Polman

❮ Previous
Next ❯

Citations

Apr 7, 2021·Nanotechnology·Ran GuoHelin Zou
May 19, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Masakazu MuraseNorihiro Mizoshita
Jun 3, 2021·The Analyst·Yuri YamadaNorihiro Mizoshita

❮ Previous
Next ❯

Methods Mentioned

BETA
atomic
scanning electron microscopy
AFM
NMR
optical microscopy
column chromatography

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.