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Browsing MIT Open Access Articles by Title

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  • Parlikar, T.A.; Chang, W.S.; Qiu, Y.H.; Seeman, M.D.; Perreault, David J.; Kassakian, John G.; Keim, Thomas A. (Institute of Electrical and Electronics Engineers (IEEE), 2005-10)
    In conventional internal combustion engines, engine valve displacements are fixed relative to crankshaft position. If these valves were actuated as a variable function of crankshaft angle, significant improvements in fuel ...
  • Gassend, Blaise Laurent Patrick; Velasquez-Garcia, Luis Fernando; Akinwande, Akintunde Ibitayo (Institute of Electrical and Electronics Engineers, 2010-06)
    This paper reports the design and fabrication of high-aspect-ratio needlelike silicon structures that can have complex geometry. The structures are hundreds of micrometers tall with submicrometer-sharp protrusions, and ...
  • Sheng, Xing; Broderick, Lirong Z.; Hu, Juejun; Yang, Li; Eshed, Anat; Fitzgerald, Eugene A.; Michel, Jurgen; Kimerling, Lionel C. (Optical Society of America, 2011-05)
    We developed a high-index-contrast photonic structure for improving the light extraction efficiency of light-emitting diodes (LEDs) by a self-assembly approach. In this approach, a two-dimensional grating can be ...
  • Chester, David A.; Bermel, Peter A.; Joannopoulos, John D.; Soljacic, Marin; Celanovic, Ivan (Optical Society of America, 2011-03)
    Solar thermal, thermoelectric, and thermophotovoltaic (TPV) systems have high maximum theoretical efficiencies; experimental systems fall short because of losses by selective solar absorbers and TPV selective emitters. To ...
  • Bermel, Peter A.; Ghebrebrhan, Michael; Chan, Walker; Yeng, YiXiang; Araghchini, Mohammad; Hamam, Rafif E.; Marton, Christopher Henry; Jensen, Klavs F.; Soljacic, Marin; Joannopoulos, John D.; Johnson, Steven G.; Celanovic, Ivan (Optical Society of America, 2010-08)
    Despite their great promise, small experimental thermophotovoltaic (TPV) systems at 1000 K generally exhibit extremely low power conversion efficiencies (approximately 1%), due to heat losses such as thermal emission of ...
  • Timko, Brian P.; Cohen-Karni, Tzahi; Qing, Quan; Tian, Bozhi; Lieber, Charles M. (Institute of Electrical and Electronics Engineers, 2010-05)
    Nanowire FETs (NWFETs) are promising building blocks for nanoscale bioelectronic interfaces with cells and tissue since they are known to exhibit exquisite sensitivity in the context of chemical and biological detection, ...
  • Lee, Howon; Fang, Nicholas Xuanlai; Zheng, Xiaoyu; Deotte, Joshua; Alonso, Matthew P.; Farquar, George R.; Weisgraber, Todd H.; Gemberling, Steven; Spadaccini, Christopher M. (American Institute of Physics (AIP), 2012-12)
    The rapid manufacture of complex three-dimensional micro-scale components has eluded researchers for decades. Several additive manufacturing options have been limited by either speed or the ability to fabricate true ...
  • Celanovic, Ivan; Ilak, Milos; O'Sullivan, Francis Martin; Kassakian, John G.; Perreault, David J. (Optical Society of America, 2004-04)
    We explore the optical characteristics and fundamental limitations of one-dimensional (1D) photonic crystal (PhC) structures as means for improving the efficiency and power density of thermophotovoltaic (TPV) and ...
  • Fu, Haitao; Yeo, Kiat-Seng; Do, Anh-Tuan; Kong, Zhi-Hui (Institute of Electrical and Electronics Engineers, 2010-02)
    The SRAM which functions as the cache for system-on-chip is vital in the electronic industry. The heavy bit-and data-line capacitances are the major road blocks to its performance. A high-performance SRAM is proposed using ...
  • Li, Yang; Cao, Rui; Lippard, Stephen J. (American Chemical Society (ACS), 2011-08)
    A novel triptycene-based ligand with a preorganized framework was designed to model carboxylate-bridged diiron active sites in bacterial multicomponent monooxygenase (BMM) hydroxylase enzymes. The synthesis of the ...
  • Tax, David Samuel; Mastovsky, Ivan; Neilson, Jeff; Shapiro, Michael; Sirigiri, Jagadishwar R.; Temkin, Richard J.; Torrezan de Sousa, Antonio Carlos (Institute of Electrical and Electronics Engineers, 2009-11)
    We report experimental results on a 1.5 MW, 110 GHz, 3 microsecond pulsed gyrotron with a single-stage depressed collector. A simplified mode converter with smooth mirror surfaces has been installed in the tube. The converter ...
  • Choi, Hak Soo; Liu, Wenhao; Liu, Fangbing; Nasr, Khaled; Misra, Preeti; Bawendi, Moungi G.; Frangioni, John V. (Nature Publishing Group, 2009-11)
    Inorganic/organic hybrid nanoparticles are potentially useful in biomedicine, but to avoid non-specific background fluorescence and long-term toxicity, they need to be cleared from the body within a reasonable timescale1. ...
  • Davis, Joseph H.; Rubin, Adam J.; Sauer, Robert T. (Oxford University Press, 2010-09)
    We have generated a series of variable-strength, constitutive, bacterial promoters that act predictably in different sequence contexts, span two orders of magnitude in strength and contain convenient sites for cloning and ...
  • Drela, Mark (SAE International, 2011-10)
    The fuel energy consumption of subsonic air transportation is examined. The focus is on identification and quantification of fundamental engineering design tradeoffs which drive the design of subsonic tube and wing transport ...
  • Ruan, Liping; Zhang, Hangyu; Luo, Hanlin; Liu, Jingping; Tang, Fushan; Shi, Ying-Kang; Zhao, Xiaojun (National Academy of Sciences, 2009-03)
    How do you design a peptide building block to make 2-dimentional nanowebs and 3-dimensional fibrous mats? This question has not been addressed with peptide self-assembling nanomaterials. This article describes a designed ...
  • Li, Xiansen; Michaelis , Vladimir K.; Ong , Ta-Chung; Smith, Stacey J.; Griffin, Robert Guy; Wang, Evelyn N.; Michaelis, Vladimir K.; Ong, Ta-Chung (John Wiley & Sons, Inc, 2014-05)
    The controllable synthesis of well-ordered layered materials with specific nanoarchitecture poses a grand challenge in materials chemistry. Here the solvothermal synthesis of two structurally analogous 5-coordinate ...
  • Baaske, Philipp; Wienken, Christoph J.; Jerabek-Willemsen, Moran; Duhr, Stefan; Luo, Yuan; Braun, Dieter; Corin, Karolina A.; Ravel, Deepali B.; Song, Junyao; Brown, Emily E.; Wang, Xiaoqiang; Zhang, Shuguang (Public Library of Science, 2011-11)
    A crucial bottleneck in membrane protein studies, particularly G-protein coupled receptors, is the notorious difficulty of finding an optimal detergent that can solubilize them and maintain their stability and function. ...
  • Dave, Nirav H.; Ng, Man Cheuk; Pellauer, Michael; Mithal, Arvind (Institute of Electrical and Electronics Engineers, 2010-07)
    We propose a practical methodology based on modular refinement to design complex systems. The methodology relies on modules with latency-insensitive interfaces so that the refinements can change the timing contract of a ...
  • Kimerling, Lionel C.; Sun, Xiaochen; Hu, Juejun; Agarwal, Anuradha Murthy (Optical Society of America, 2009-04)
    In this paper, we propose a design tool for dielectric optical resonator-based biochemical refractometry sensors. Analogous to the widely accepted photodetector figure of merit, the detectivity D*, we introduce a new sensor ...
  • Ryan, Jason Christopher; Cummings, M. L.; Roy, Nicholas; Banerjee, Ashis; Schulte, Axel (American Institute of Aeronautics and Astronautics, 2011-03)
    In the near future, unmanned aerial vehicles will become part of the naval aircraft carrier operating environment. This will add significant complexity to an already highly constrained and dangerous environment. The move ...
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