Rami Hourani
Etching (microfabrication)Surface modificationTransmission electron microscopyComputational chemistryCopolymerCatalysisNanotechnologyX-ray photoelectron spectroscopyOrganic chemistryChemistryPolymer chemistryThin filmMaterials scienceMolecular orbital theoryCombinatorial chemistrySilicon nitrideNanotubePorous membraneChemical engineeringPolymerDendrimerCyclic peptideClick chemistryFluorescence
Publications 18
#1Li Hong Liu (UTD: University of Texas at Dallas)H-Index: 5
#2David J. Michalak (Intel)H-Index: 19
Last. Yves J. Chabal (UTD: University of Texas at Dallas)H-Index: 106
view all 11 authors...
The ability to selectively chemically functionalize silicon nitride (Si3N4) or silicon dioxide (SiO2) surfaces after cleaning would open interesting technological applications. In order to achieve this goal, the chemical composition of surfaces needs to be carefully characterized so that target chemical reactions can proceed on only one surface at a time. While wet-chemically cleaned silicon dioxide surfaces have been shown to be terminated with surficial Si-OH sites, chemical composition of the...
18 CitationsSource
#1Li Hong LiuH-Index: 5
#2William J. I. DeBenedetti (UTD: University of Texas at Dallas)H-Index: 10
Last. Yves J. ChabalH-Index: 106
view all 9 authors...
#1Li Hong Liu (UTD: University of Texas at Dallas)H-Index: 5
#2William J. I. DeBenedetti (UTD: University of Texas at Dallas)H-Index: 10
Last. Yves J. Chabal (UTD: University of Texas at Dallas)H-Index: 106
view all 9 authors...
Several reports on the chemical termination of silicon nitride films after HF etching, an important process in the microelectronics industry, are inconsistent claiming N-Hx, Si-H, or fluorine termination. An investigation combining infrared and x-ray photoelectron spectroscopies with atomic force and scanning electron microscopy imaging reveals that under some processing conditions, salt microcrystals are formed and stabilized on the surface, resulting from products of Si3N4 etching. Rinsing in ...
10 CitationsSource
#1Chen ZhangH-Index: 2
#1Chen ZhangH-Index: 10
Last. Ting XuH-Index: 39
view all 5 authors...
#1Michael A. Whitehead (McGill University)H-Index: 14
#2Ashok K. Kakkar (McGill University)H-Index: 38
Last. Tom Lazzara (GAU: University of Göttingen)
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Geometric characterization of two 1,3,5-triethynylbenzene (TEB) based dendrimers containing tin and platinum linking agents, and a 3,5- dihydroxybenzylalcohol (DHBA) based dendrimer containing a siloxane linking used the Semi-Empirical (PM3) Molecular Orbital Method and the Density Functional Theory Method (DFT). The theoretical results showed the increased rigidity of the backbone going from DHBA Silicon, Si, structure to TEB Tin, Sn, structure to TEB Platinum, Pt, dendrimer makes the dendrimer...
#1Rami Hourani (University of California, Berkeley)H-Index: 10
#2Chen Zhang (University of California, Berkeley)H-Index: 2
Last. Ting Xu (University of California, Berkeley)H-Index: 39
view all 8 authors...
A facile route to generate cyclic peptide nanotubes with tunable interiors is presented. By incorporating 3-amino-2-methylbenzoic acid in the d,l-alternating primary sequence of a cyclic peptide, a functional group can be presented in the interior of the nanotubes without compromising the formation of high aspect ratio nanotubes. The new design of such a cyclic peptide also enables one to modulate the nanotube growth process to be compatible with the polymer processing window without compromisin...
105 CitationsSource
#1Anjali SharmaH-Index: 14
#2Kevin D. NeibertH-Index: 8
Last. Ashok K. KakkarH-Index: 38
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Bi- and trifunctional dendrimer and miktoarm nanocarriers. containing a combination of covalently linked model drug (α-lipoic acid), fluorescent dye (BODIPY), and poly(ethylene glycol) (PEG), are synthesized using a core with orthogonal functional groups, on which Huisgen alkyne―azide "click" reactions are performed in sequence. These carriers are internalized into the cells where they reduce H 2 O 2 induced reactive oxygen species formation. In addition, miktoarm nanocarriers conjugated with α-...
23 CitationsSource
#1Ting Xu (University of California, Berkeley)H-Index: 39
#2Nana ZhaoH-Index: 1
Last. Brett A. HelmsH-Index: 38
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Porous thin films containing subnanometer channels oriented normal to the surface exhibit unique transport and separation properties and can serve as selective membranes for separation and protective coatings. While molecularly defined nanoporous inorganic and organic materials abound, generating flexible nanoporous thin films with highly aligned channels over large areas has been elusive. Here, we developed a new approach where the growth of cyclic peptide nanotubes can be directed in a structu...
82 CitationsSource
#1Rami Hourani (McGill University)H-Index: 10
#2Anjali Sharma (McGill University)H-Index: 14
Last. Ashok K. Kakkar (McGill University)H-Index: 38
view all 3 authors...
Synthesis of molecular building blocks that incorporate azide and alkyne-terminated functionalities suitable for CuI-catalyzed cycloaddition between alkynes and azides is reported. Their utility in constructing dendritic frameworks with 4, 6, or 12 peripheral acetylene groups using either the convergent or divergent methodology, and their functionalization with desirable end groups are demonstrated.
13 CitationsSource
#1Rami Hourani (McGill University)H-Index: 10
#2Ashok K. Kakkar (McGill University)H-Index: 38
: Highly functional and monodisperse macromolecules with tailored architecture constitute the key to designing efficient and smart nanomaterials. Dendrimers offer real potential to achieve this goal, and one of the earlier challenges faced by this novel class of polymers has been addressed by the evolution of synthetic methodologies. This review provides an evaluation of the role played by chemistry in taking these macromolecules of academic relevance to practical industrial and biological appli...
86 CitationsSource