User profiles for David C Bell

David C. Bell

Harvard 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

Y Wu, Y Cui, L Huynh, CJ Barrelet, DC Bell… - Nano …, 2004 - ACS Publications
Single-crystal silicon nanowires with diameters approaching molecular dimensions were
synthesized using gold nanocluster-catalyzed 1D growth. High-resolution transmission …

Metal ion cycling of Cu foil for selective CC coupling in electrochemical CO2 reduction

K Jiang, RB Sandberg, AJ Akey, X Liu, DC Bell… - Nature Catalysis, 2018 - nature.com
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 …

Massive Dirac fermions in a ferromagnetic kagome metal

…, C Jozwiak, A Bostwick, E Rotenberg, DC Bell… - Nature, 2018 - nature.com
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 …

Alkali-Stabilized Pt-OHx Species Catalyze Low-Temperature Water-Gas Shift Reactions

…, P Ferrin, AU Nilekar, G Peng, JA Herron, DC Bell… - Science, 2010 - science.org
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 + …

Synthesis of CdS and ZnS nanowires using single-source molecular precursors

CJ Barrelet, Y Wu, DC Bell… - Journal of the American …, 2003 - ACS Publications
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 …

Rapid fabrication of uniformly sized nanopores and nanopore arrays for parallel DNA analysis

MJ Kim, M Wanunu, DC Bell, A Meller - Advanced materials, 2006 - Wiley Online Library
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 …

Dirac fermions and flat bands in the ideal kagome metal FeSn

…, D Graf, K Kaznatcheev, E Vescovo, DC Bell… - Nature materials, 2020 - nature.com
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. …

Layer Hall effect in a 2D topological axion antiferromagnet

A Gao, YF Liu, C Hu, JX Qiu, C Tzschaschel, B Ghosh… - Nature, 2021 - nature.com
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, …

Influence of iron doping on tetravalent nickel content in catalytic oxygen evolving films

…, TJ Kempa, F Von Cube, DC Bell… - Proceedings of the …, 2017 - National Acad Sciences
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 …

Precision cutting and patterning of graphene with helium ions

DC Bell, MC Lemme, LA Stern, JR Williams… - …, 2009 - iopscience.iop.org
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 …