Rikkert J Nap
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Explore the profile of Rikkert J Nap including associated specialties, affiliations and a list of published articles.
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28
Citations
245
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Recent Articles
11.
Yu J, Nap R, Szleifer I, Wong J
Langmuir
. 2019 Jul;
35(48):15864-15871.
PMID: 31353909
Superparamagnetic nanoparticles (SPIONs) can be used as nuclear magnetic resonance (NMR) signal enhancement agents for petroleum exploration. This enhancement effect is uniform if SPIONs are monodisperse in size and in...
12.
Westmoreland D, Nap R, Arcudi F, Szleifer I, Weiss E
Chem Commun (Camb)
. 2019 Apr;
55(38):5435-5438.
PMID: 30997460
Increasing negative charge density at the surfaces of CdSe quantum dots (QDs) effects a bathochromic shift of their ground state optical spectra with increasing pH due to electrostatic and chemical...
13.
Nap R, Szleifer I
J Chem Phys
. 2018 Nov;
149(16):163309.
PMID: 30384749
We study the interactions between two planar surfaces end-tethered with poly(acrylic acid) polymers in electrolyte solutions containing calcium ions, using a molecular theory. We found that by adding divalent calcium...
14.
Chin S, Synatschke C, Liu S, Nap R, Sather N, Wang Q, et al.
Nat Commun
. 2018 Jun;
9(1):2395.
PMID: 29921928
Skeletal muscle provides inspiration on how to achieve reversible, macroscopic, anisotropic motion in soft materials. Here we report on the bottom-up design of macroscopic tubes that exhibit anisotropic actuation driven...
15.
Lopez L, Nap R
Phys Chem Chem Phys
. 2018 Jun;
20(24):16657-16665.
PMID: 29873656
Sensitive switching between OFF and ON states is a desirable feature in stimuli-responsive nanopores and nanochannels. In this work, we show that nanogates modified with weak polyelectrolytes can be controlled...
16.
Nap R, Gonzalez Solveyra E, Szleifer I
Biomater Sci
. 2018 Apr;
6(5):1048-1058.
PMID: 29652053
When engineering nanomaterials for application in biological systems, it is important to understand how multivalent ions, such as calcium, affect the structural and chemical properties of polymer-modified nanoconstructs. In this...
17.
Nap R, Park S, Szleifer I
Soft Matter
. 2018 Mar;
14(12):2365-2378.
PMID: 29503993
We have developed a molecular model to describe the structural changes and potential collapse of weak polyelectrolyte layers end-tethered to planar surfaces and spherical nanoparticles as a function of pH...
18.
Morochnik S, Nap R, Ameer G, Szleifer I
Soft Matter
. 2017 Sep;
13(37):6322-6331.
PMID: 28905971
Herein, we develop a molecular theory to examine a class of pH and temperature-responsive tethered polymer layers. The response of pH depends on intramolecular charge repulsion of weakly acidic monomers...
19.
Nap R, Losdorfer BoZic A, Szleifer I, Podgornik R
Biophys J
. 2014 Nov;
107(8):1970-1979.
PMID: 25418178
We investigate and quantify the effects of pH and salt concentration on the charge regulation of the bacteriophage PP7 capsid. These effects are found to be extremely important and substantial,...
20.
Park Y, Paulsen J, Nap R, Whitaker R, Mathiyazhagan V, Song Y, et al.
Langmuir
. 2014 Jan;
30(3):784-92.
PMID: 24393031
Superparamagnetic iron oxide (SPIO) nanoparticles have the potential to be used in the characterization of porous rock formations in oil fields as a contrast agent for NMR logging because they...