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- Author:
- Zhang, Xujun; Blalock, Bradford; Huberty, Wayne; Chen, Yuwu; Hung, Francisco; Russo, Paul S.
- Source:
- Langmuir 2019 v.35 no.12 pp. 4380-4386
- ISSN:
- 1520-5827
- Subject:
- acids; ceratoulmin; chemical bases; cleaning; copper nanoparticles; cyclohexanes; dispersants; droplets; fungi; gases; hydrodynamics; hydrophobins; light scattering; microbubbles; oil spills; oils; seawater; solvents; surfactants
- Abstract:
- ... Hydrophobins are abundant amphipathic proteins produced by fungi. They have been interacting with oils in natural environments for millions of years; therefore, it is sensible to consider them as surfactants and dispersants for cleaning oil spills. To better understand the properties of these amphipathic proteins in seawater, a particular hydrophobin known as cerato-ulmin (CU; mass 7627 g/mol) was ...
- DOI:
- 10.1021/acs.langmuir.8b03777
-
http://dx.doi.org/10.1021/acs.langmuir.8b03777
- Author:
- Luan, Pingshan; Oehrlein, Gottlieb S.
- Source:
- Langmuir 2019 v.35 no.12 pp. 4270-4277
- ISSN:
- 1520-5827
- Subject:
- Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; chemical analysis; chemical bonding; elemental composition; films (materials); moieties; polystyrenes
- Abstract:
- ... We report on the chemical analysis of ultrathin (10 nm) polymer films using the attenuated total reflectance–Fourier transform infrared (ATR-FTIR) technique based on p-polarized infrared light and two types of enhancing substrates, that is, metallic (Au) and dielectric (Si). We selected low-temperature plasma-treated ∼10 nm thick polystyrene films as a test case for demonstrating the capability of ...
- DOI:
- 10.1021/acs.langmuir.9b00316
-
http://dx.doi.org/10.1021/acs.langmuir.9b00316
- Author:
- Qing, Leying; Li, Yu; Tang, Weiqiang; Zhang, Duo; Han, Yongsheng; Zhao, Shuangliang
- Source:
- Langmuir 2019 v.35 no.12 pp. 4254-4262
- ISSN:
- 1520-5827
- Subject:
- adsorption; density functional theory; equations; ions; nanopores; porosity; porous media; prediction; theoretical models
- Abstract:
- ... The adsorption processes of ions into charged nanospace are associated with many practical applications. Whereas a large number of microporous materials have been prepared toward efficient adsorption of ions from solutions, theoretical models that allow for capturing the characteristics of ion dynamic adsorption into like-charged nanopores are still few. The difficulty originates from the overlapp ...
- DOI:
- 10.1021/acs.langmuir.9b00088
-
http://dx.doi.org/10.1021/acs.langmuir.9b00088
- Author:
- Kwok, Man-hin; Sun, Guanqing; Ngai, To
- Source:
- Langmuir 2019 v.35 no.12 pp. 4205-4217
- ISSN:
- 1520-5827
- Subject:
- adsorption; catalytic activity; emulsions; environmental factors; food science; industrial applications; microgels; nanoparticles; oil-water interface; oils; pH; rheological properties; surface tension
- Abstract:
- ... The use of soft microgel particles for stabilizing emulsions has captured increasing attention across a wide range of disciplines in the past decades. Being soft, the nanoparticles, which are spherical in solution, undergo a structure change when adsorbed at the oil–water interface. This morphology change leads to the special dynamic properties of interface layers and packing structures, which the ...
- DOI:
- 10.1021/acs.langmuir.8b04009
-
http://dx.doi.org/10.1021/acs.langmuir.8b04009
- Author:
- Lu, Yingda; Najafabadi, Nariman Fathi; Firoozabadi, Abbas
- Source:
- Langmuir 2019 v.35 no.12 pp. 4263-4269
- ISSN:
- 1520-5827
- Subject:
- calcite; carbonates; contact angle; mica; oils; pentanols; petroleum; quartz; sandstone; sodium chloride; synergism; wettability; zeta potential
- Abstract:
- ... High-concentration brines generally cause the wettability of petroleum fluid–brine–rock systems to become less water-wet (more oil-wet). The addition of alcohols to the brine, however, may produce an opposite effect. In this work, we investigate the synergic effects of a low concentration of 1-pentanol and brines on the wettability of petroleum fluid–brine–rock systems. The variables examined incl ...
- DOI:
- 10.1021/acs.langmuir.9b00099
-
http://dx.doi.org/10.1021/acs.langmuir.9b00099
- Author:
- Stammitti-Scarpone, Aurelio; Acosta, Edgar J.
- Source:
- Langmuir 2019 v.35 no.12 pp. 4305-4318
- ISSN:
- 1520-5827
- Subject:
- Gibbs free energy; cleaning; contact angle; emulsions; energy; equations; glass; mica; models; oils; polytetrafluoroethylene; prediction; sodium; stainless steel; surface tension; surfactants; wettability
- Abstract:
- ... Surfactant–oil–water (SOW) systems are important for numerous applications, including hard surface cleaning, detergency, and enhanced oil-recovery applications. There is limited literature on the wettability of solid–liquid–liquid (SLL) systems around the surfactant phase inversion point (PIP), and the few references that exist point to wettability inversion accompanying the microemulsion (μE) pha ...
- DOI:
- 10.1021/acs.langmuir.8b03907
-
http://dx.doi.org/10.1021/acs.langmuir.8b03907
- Author:
- Esteso, V.; Carretero-Palacios, S.; Thiyam, P.; Míguez, H.; Parsons, D. F.; Brevik, I.; Boström, M.
- Source:
- Langmuir 2019 v.35 no.12 pp. 4218-4223
- ISSN:
- 1520-5827
- Subject:
- adsorption; aluminum; bubbles; gold; hydrodynamics; models; polystyrenes; sand; silica; silver
- Abstract:
- ... Gas bubbles in a water-filled cavity move upward because of buoyancy. Near the roof, additional forces come into play, such as Lifshitz, double layer, and hydrodynamic forces. Below uncharged metallic surfaces, repulsive Lifshitz forces combined with buoyancy forces provide a way to trap micrometer-sized bubbles. We demonstrate how bubbles of this size can be stably trapped at experimentally acces ...
- DOI:
- 10.1021/acs.langmuir.8b04176
-
http://dx.doi.org/10.1021/acs.langmuir.8b04176
- Author:
- Mohan, Ahana; Ashraf, P. Muhamed
- Source:
- Langmuir 2019 v.35 no.12 pp. 4328-4335
- ISSN:
- 1520-5827
- Subject:
- Fourier transform infrared spectroscopy; antifouling agents; biofouling; coatings; composite polymers; estuaries; hydrogels; hydrogen; hydrophilicity; polyethylene; scanning electron microscopy; zwitterions
- Abstract:
- ... Biofouling in aquaculture cages negatively affects the farm productivity, and it requires huge sums of money and labor for its management. A superhydrophilic pseudozwitterionic hydrogel, N-isopropylacrylamide (NIPA) + [2-(methacryloyloxy)ethyl]trimethylammonium (TMA) + 3-sulfopropyl methacrylate (SA) copolymer, is considered as a potential antifouling agent. The present study aimed to synthesize a ...
- DOI:
- 10.1021/acs.langmuir.8b04071
-
http://dx.doi.org/10.1021/acs.langmuir.8b04071
- Author:
- Jin, Juan; Feng, Zhenqiang; Yang, Fang; Gu, Ning
- Source:
- Langmuir 2019 v.35 no.12 pp. 4238-4245
- ISSN:
- 1520-5827
- Subject:
- Fourier transform infrared spectroscopy; aqueous solutions; hydrogen bonding; light microscopy; microbubbles; nanobubbles; reflectance; sulfur hexafluoride; zeta potential
- Abstract:
- ... Nanobubbles (NBs), given its extraordinary properties, have drawn keen attention in the field of nanotechnology worldwide. However, compared to that of surface NBs, generation of stable bulk NBs remains an arduous task with the prevailing method. In this study, we developed a pressure-driven method to prepare bulk NBs by repeatedly compressing sulfur hexafluoride (SF₆) gas into water. The results ...
- DOI:
- 10.1021/acs.langmuir.8b04314
-
http://dx.doi.org/10.1021/acs.langmuir.8b04314
- Author:
- Ranade, Ameya V; Mukhtarov, Rustam; An Liu, Ken Jia; Behrner, Melissa A.; Sun, Bingyun
- Source:
- Langmuir 2019 v.35 no.12 pp. 4224-4232
- ISSN:
- 1520-5827
- Subject:
- EDTA (chelating agent); adsorption; milk proteins; polyacrylamide gel electrophoresis; silver staining
- Abstract:
- ... Sample loss caused by competitive protein adsorption on solid surfaces from complex samples remains to be a major hurdle in sensitive analyses of proteins. No label-free techniques can easily quantify individual proteins adsorbed on irregular surfaces of Eppendorf vials or Falcon tubes, which are commonly used to contain complex biological samples. Multiplexed characterization of such adsorption b ...
- DOI:
- 10.1021/acs.langmuir.8b04281
-
http://dx.doi.org/10.1021/acs.langmuir.8b04281
- Author:
- Wang, Peng; Xu, Xiaoying; Wang, Yue; Zhou, Benqing; Qu, Jiao; Li, Jin; Shen, Mingwu; Xia, Jindong; Shi, Xiangyang
- Source:
- Langmuir 2019 v.35 no.12 pp. 4336-4341
- ISSN:
- 1520-5827
- Subject:
- dispersibility; folic acid; image analysis; ligands; lysine; magnetic resonance imaging; magnetism; manganese oxides; nanoparticles; neoplasms; rhodamines; zwitterions
- Abstract:
- ... We present the design of antifouling zwitterion-functionalized manganese oxide (Mn₃O₄) nanoparticles (NPs) modified with folic acid (FA) for targeted tumor magnetic resonance (MR) imaging. In the current work, diethylene glycol-stabilized Mn₃O₄ NPs were initially prepared via a solvothermal approach, coated with polydopamine (PDA), fluorescently labeled with rhodamine B, conjugated with FA via ami ...
- DOI:
- 10.1021/acs.langmuir.9b00013
-
http://dx.doi.org/10.1021/acs.langmuir.9b00013
- Author:
- Lei, Nana; Feng, Lei; Chen, Xiao
- Source:
- Langmuir 2019 v.35 no.12 pp. 4370-4379
- ISSN:
- 1520-5827
- Subject:
- aqueous solutions; electrostatic interactions; hydrogen bonding; hydrophobic bonding; luminescence; micelles; models; pH; protonation; surfactants; zwitterions
- Abstract:
- ... Recently, hybrid coassembly between polyoxometalates (POMs) and cationic building blocks provides an efficient strategy to greatly optimize POMs’ functionality as well as their aggregate structural diversity. Adaptive hybrid supramolecular materials with enhanced luminescence have then been obtained from lanthanide-containing POMs. In this work, a commercially available and pH-switchable zwitterio ...
- DOI:
- 10.1021/acs.langmuir.9b00261
-
http://dx.doi.org/10.1021/acs.langmuir.9b00261
- Author:
- Huang, Lina; Zhou, Changhua; Zhang, Yujuan; Zhang, Shengmao; Zhang, Pingyu
- Source:
- Langmuir 2019 v.35 no.12 pp. 4342-4352
- ISSN:
- 1520-5827
- Subject:
- activation energy; additives; antioxidant activity; antioxidants; differential scanning calorimetry; dispersibility; equations; half life; lubricants; lubrication; nanocomposites; nanoparticles; oils; oxidation; oxygen; phenol; propionic acid; temperature; thermal stability; thermogravimetry; zinc; zinc oxide
- Abstract:
- ... In this article, 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid (DBHP)-functionalized ZnO (DBHP–ZnO) nanoparticles were synthesized by decomposing the organometallic precursor Zn(DBHP)₂ under alkaline conditions. This in situ surface modification method can induce small-sized ZnO nanoparticles (5 nm) and form strong linkage between DBHP and ZnO nanoparticles. DBHP as an organic compound hind ...
- DOI:
- 10.1021/acs.langmuir.9b00093
-
http://dx.doi.org/10.1021/acs.langmuir.9b00093
- Author:
- Boettcher, Tim; Schaefer, Sandra; Antoni, Markus; Stohr, Tobias; Kunz, Ulrike; Dürrschnabel, Michael; Molina-Luna, Leopoldo; Ensinger, Wolfgang; Muench, Falk
- Source:
- Langmuir 2019 v.35 no.12 pp. 4246-4253
- ISSN:
- 1520-5827
- Subject:
- catalytic activity; crystal structure; electron microscopy; hydrazine; nanoparticles; nanotubes; nickel; polymers; reducing agents
- Abstract:
- ... Nano-objects are favored structures for applications such as catalysis and sensing. Although they already provide a large surface-to-volume ratio, this ratio can be further increased by shape-selective plating of the nanostructure surfaces. This process combines the conformity of autocatalytic deposition with the defined nucleation and growth characteristics of colloidal nanoparticle syntheses. Ho ...
- DOI:
- 10.1021/acs.langmuir.9b00030
-
http://dx.doi.org/10.1021/acs.langmuir.9b00030
- Author:
- Tang, Yanfei; Grest, Gary S.; Cheng, Shengfeng
- Source:
- Langmuir 2019 v.35 no.12 pp. 4296-4304
- ISSN:
- 1520-5827
- Subject:
- cooling; drying; evaporation; liquid-air interface; molecular dynamics; nanoparticles; prediction; simulation models; solvents; temperature profiles; vapors
- Abstract:
- ... A potential strategy for controlling stratification in a drying suspension of bidisperse particles is studied using molecular dynamics simulations. When the suspension is maintained at a constant temperature during fast drying, it can exhibit “small-on-top” stratification with an accumulation (depletion) of smaller (larger) particles in the top region of the drying film, consistent with the predic ...
- DOI:
- 10.1021/acs.langmuir.8b03659
-
http://dx.doi.org/10.1021/acs.langmuir.8b03659
- Author:
- Nakata, Satoshi; Nasu, Kyoko; Irie, Yasutaka; Hatano, Sayaka
- Source:
- Langmuir 2019 v.35 no.12 pp. 4233-4237
- ISSN:
- 1520-5827
- Subject:
- camphor; irradiation; photochemical reactions; photosensitivity; ultraviolet radiation
- Abstract:
- ... We have studied the self-propelled motion of a camphor disk on a 2,2′-bis(2-chlorophenyl)-4,4′,5,5′-tetraphenyl-1,2′-biimidazole (o-Cl-HABI) molecular layer, which was developed on water, as a photomechanical sensing system. The o-Cl-HABI dimer changed to its monomeric form upon UV light irradiation, and as a result, the surface pressure of the o-Cl-HABI molecular layer decreased. The reciprocatin ...
- DOI:
- 10.1021/acs.langmuir.8b04285
-
http://dx.doi.org/10.1021/acs.langmuir.8b04285
- Author:
- Liu, Sheng; Xie, Lei; Liu, Guangyi; Zhong, Hong; Wang, Yixiang; Zeng, Hongbo
- Source:
- Langmuir 2019 v.35 no.12 pp. 4353-4363
- ISSN:
- 1520-5827
- Subject:
- Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; adsorption; air; atomic force microscopy; bubbles; copper; engineering; hydrodynamics; hydrophobic bonding; industrial applications; ligands; pH; pyrite; sodium
- Abstract:
- ... Surface modification by chemical reagents is of profound importance to modulate the surface characteristic and functionality of materials, which has attracted tremendous interest in many research fields and industrial applications, such as froth flotation of minerals. In this work, a new reagent S-[(2-hydroxyamino)-2-oxoethyl]-O-octyl-dithiocarbonate ester (HAOODE) with heterodifunctional ligands ...
- DOI:
- 10.1021/acs.langmuir.9b00156
-
http://dx.doi.org/10.1021/acs.langmuir.9b00156
- Author:
- Zhou, Tingtao; Ioannidou, Katerina; Masoero, Enrico; Mirzadeh, Mohammad; Pellenq, Roland J.-M.; Bazant, Martin Z.
- Source:
- Langmuir 2019 v.35 no.12 pp. 4397-4402
- ISSN:
- 1520-5827
- Subject:
- cement; durability; evaporation; mathematical models; porous media; sorption
- Abstract:
- ... A numerical and theoretical framework to address the poromechanical effect of capillary stress in complex mesoporous materials is proposed and exemplified for water sorption in cement. We first predict the capillary condensation/evaporation isotherm using lattice-gas simulations in a realistic nanogranular cement model. A phase-field model to calculate moisture-induced capillary stress is then int ...
- DOI:
- 10.1021/acs.langmuir.8b03400
-
http://dx.doi.org/10.1021/acs.langmuir.8b03400
- Author:
- Fu, Qi-Qi; Li, Yu-Da; Li, Hui-Hui; Xu, Liang; Wang, Zhi-Hua; Yu, Shu-Hong
- Source:
- Langmuir 2019 v.35 no.12 pp. 4364-4369
- ISSN:
- 1520-5827
- Subject:
- byproducts; commercialization; copper; copper nanoparticles; electrodes; electronics; ions; nanowires; purification methods; ripening
- Abstract:
- ... Copper nanowires (Cu NWs) are among ideal candidates for fabricating various advanced nanodevices, especially flexible electronics and transparent conductive electrodes. However, although many efforts have been made, the commercialization of Cu NWs is still difficult. Herein, we report an in situ seed-mediated two-step strategy to synthesize well-defined Cu NWs in high yield. In the first step, th ...
- DOI:
- 10.1021/acs.langmuir.9b00042
-
http://dx.doi.org/10.1021/acs.langmuir.9b00042
- Author:
- Zhou, You; Albijanic, Boris; Tadesse, Bogale; Wang, Yuling; Yang, Jianguo; Zhu, Xiangnan
- Source:
- Langmuir 2019 v.35 no.12 pp. 4278-4286
- ISSN:
- 1520-5827
- Subject:
- air; bubbles; hydrophobicity; liquid-air interface; models; quartz; surfactants
- Abstract:
- ... Bubble–particle attachment is the key step for successful flotation. Modeling of attachment interactions between air bubbles and particles after their collision can be analyzed using the Stefan–Reynolds model (immobile bubble surfaces) and the modified Stefan–Reynolds model (mobile bubble surfaces). However, these models have been rarely used, and the limitations of these models have not yet been ...
- DOI:
- 10.1021/acs.langmuir.9b00397
-
http://dx.doi.org/10.1021/acs.langmuir.9b00397