User profiles for David C Bell
David C. BellHarvard John A. Paulson School of Engineering and Applied Sciences, Harvard University Verified email at seas.harvard.edu Cited by 14329 |
Controlled growth and structures of molecular-scale silicon nanowires
Single-crystal silicon nanowires with diameters approaching molecular dimensions were
synthesized using gold nanocluster-catalyzed 1D growth. High-resolution transmission …
synthesized using gold nanocluster-catalyzed 1D growth. High-resolution transmission …
Metal ion cycling of Cu foil for selective C–C coupling in electrochemical CO2 reduction
Electrocatalytic CO 2 reduction to higher-value hydrocarbons beyond C 1 products is desirable
for applications in energy storage, transportation and the chemical industry. Cu catalysts …
for applications in energy storage, transportation and the chemical industry. Cu catalysts …
Massive Dirac fermions in a ferromagnetic kagome metal
The kagome lattice is a two-dimensional network of corner-sharing triangles 1 that is known
to host exotic quantum magnetic states 2 , 3 , 4 . Theoretical work has predicted that kagome …
to host exotic quantum magnetic states 2 , 3 , 4 . Theoretical work has predicted that kagome …
Alkali-Stabilized Pt-OHx Species Catalyze Low-Temperature Water-Gas Shift Reactions
We report that alkali ions (sodium or potassium) added in small amounts activate platinum
adsorbed on alumina or silica for the low-temperature water-gas shift (WGS) reaction (H 2 O + …
adsorbed on alumina or silica for the low-temperature water-gas shift (WGS) reaction (H 2 O + …
Synthesis of CdS and ZnS nanowires using single-source molecular precursors
Single-source molecular precursors were used to synthesize II−VI compound semiconductor
nanowires for the first time. Cadmium sulfide and zinc sulfide nanowires were prepared …
nanowires for the first time. Cadmium sulfide and zinc sulfide nanowires were prepared …
Rapid fabrication of uniformly sized nanopores and nanopore arrays for parallel DNA analysis
Nanometer-sized pores can be used to detect and characterize biopolymers, such as DNA,
RNA, and polypeptides, with single-molecule resolution. Experiments performed with the 1.5 …
RNA, and polypeptides, with single-molecule resolution. Experiments performed with the 1.5 …
Dirac fermions and flat bands in the ideal kagome metal FeSn
A kagome lattice of 3d transition metal ions is a versatile platform for correlated topological
phases hosting symmetry-protected electronic excitations and magnetic ground states. …
phases hosting symmetry-protected electronic excitations and magnetic ground states. …
Layer Hall effect in a 2D topological axion antiferromagnet
Whereas ferromagnets have been known and used for millennia, antiferromagnets were only
discovered in the 1930s 1 . At large scale, because of the absence of global magnetization, …
discovered in the 1930s 1 . At large scale, because of the absence of global magnetization, …
Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films
Iron doping of nickel oxide films results in enhanced activity for promoting the oxygen evolution
reaction (OER). Whereas this enhanced activity has been ascribed to a unique iron site …
reaction (OER). Whereas this enhanced activity has been ascribed to a unique iron site …
Precision cutting and patterning of graphene with helium ions
We report nanoscale patterning of graphene using a helium ion microscope configured for
lithography. Helium ion lithography is a direct-write lithography process, comparable to …
lithography. Helium ion lithography is a direct-write lithography process, comparable to …