J. R. Lu

A Disk of Young Stars at the Galactic Center as Determined by Individual Stellar Orbits (2008)

Lu, J. R., Ghez, A. M., Hornstein, S. D., Morris, M. R., Becklin, E. E., Matthews, K.

We present new proper motions from the 10 m Keck telescopes for a puzzling population of massive, young stars located within 3.5" (0.14 pc) of the supermassive black hole at the Galactic Center. Our...

Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits (2008)

Ghez, A. M., Salim, S., Weinberg, N. N., Lu, J. R., Do, T., Dunn, J. K., ...

We report new precision measurements of the properties of our Galaxy's supermassive black hole. Based on astrometric (1995-2007) and radial velocity (2000-2007) measurements from the W. M. Keck...

An X-ray, IR, and Submillimeter Flare of Sagittarius A* (2007)

Marrone, D. P., Baganoff, F. K., Morris, M. R., Moran, J. M., Ghez, A. M., Hornstein, S. D., ...

Energetic flares are observed in the Galactic supermassive black hole Sagittarius A* from radio to X-ray wavelengths. On a few occasions, simultaneous flares have been detected in IR and X-ray...

A Constant Spectral Index for Sagittarius A* During Infrared/X-ray Intensity Variations (2007)

Hornstein, S. D., Matthews, K., Ghez, A. M., Lu, J. R., Morris, M., Becklin, E. E., ...

We report the first time-series of broadband infrared (IR) color measurements of Sgr A*, the variable emission source associated with the supermassive black hole at the Galactic Center. Using the...

Photometric Stellar Variability in the Galactic Center (2007)

Rafelski, M., Ghez, A. M., Hornstein, S. D., Lu, J. R., Morris, M.

We report the results of a diffraction-limited, photometric variability study of the central 5"x5" of the Galaxy conducted over the past 10 years using speckle imaging techniques on the W. M. Keck I...

Galactic Center Youth: Orbits and Origins of the Young Stars in the Central Parsec (2006)

Lu, J. R., Ghez, A. M., Hornstein, S. D., Morris, M., Matthews, K., Thompson, D. J., ...

We present new proper motions for the massive, young stars at the Galactic Center, based on 10 years of diffraction limited data from the Keck telescopes. Our proper motion measurements now have...

Infrared/X-ray intensity variations and the color of Sgr A* (2006)

Hornstein, S. D., Matthews, K., Ghez, A. M., Lu, J. R., Morris, M., Becklin, E., ...

We report the frst time-series measurements of Sgr A*-IR's broadband infrared color. Using the newly commissioned laser guide star adaptive optics (LGS AO) system on the Keck II telescope, we imaged...

IRS 16SW - A New Comoving Group of Young Stars in the Central Parsec of the Milky Way (2005)

Lu, J. R., Ghez, A. M., Hornstein, S. D., Morris, M., Becklin, E. E.

One of the most perplexing problems associated with the supermassive black hole at the center of our Galaxy is the origin of the young stars in its close vicinity. Using proper motion measurements...

A Remarkable Low-Mass X-ray Binary within 0.1 pc of the Galactic Center (2005)

Muno, M. P., Lu, J. R., Baganoff, F. K., Brandt, W. N., Garmire, G. P., Ghez, A. M., ...

Recent X-ray and radio observations have identified a transient low-mass X-ray binary (LMXB) located only 0.1 pc in projection from the Galactic center, CXOGC J174540.0-290031. In this paper, we...

Neutron Reflection from the Liquid-Liquid Interface: Adsorption of Hexadecylphosphorylcholine to the HexadecaneAqueous Solution Interface (2005)

Zarbakhsh, A, Querol, A, Bowers, J, Yaseen, M, Lu, J R, Webster, J

Surface induced unfolding of human lactoferrin (2005)

Lu, J R, Perumal, S, Zhao, Xiubo, Miano, F, Enea, V, Heenan, R K, ...

Neutron reflection from the liquidliquid interface: Adsorption of hexadecylphosphorylcholine to the hexadecane-aqueous solution interface (2005)

Zarbakhsh, A, Querol, A, Bowers, J, Yaseen, M, Lu, J R, Webster, J R P

Adsorption of single chain Zwitterionic phosphocholine surfactants: Effects of length of alkyl chain and head group linker (2005)

Yaseen, A, Lu, J R, Webster, J R P, Penfold, J

Surface adsorption of zwitterionic surfactants: n-alkyl phosphocholines characterised by surface tensiometry and neutron reflection (2005)

Yaseen, M, Wang, Y, Su, T J, Lu, J R

Surface adsorption of zwitterionic surfactants: n-alkyl phosphocholines characterised by surface tensiometry and neutron reflection (2005)

Yaseen, M, Wang, Y, Su, T J, Lu, J R

The metrics of surface adsorbed small molecules on the Young's fringe dual-slab waveguide interferometer. (2004)

Cross, G. H., Reeves, A., Brand, S., Swann, M. J., Peel, L. L., Freeman, N. J., ...

A method for analysing thin films using a dual-waveguide interferometric technique is described. Alternate dual polarization addressing of the interferometer sensor using a ferroelectric liquid...

Interfacial nano-structuring of designed peptides regulated by solution pH (2004)

Lu, J R, Perumal, S, Hopkinson, I, Webster, J R P, Penfold, J, Hwang, W, ...

Stellar Orbits Around the Galactic Center Black Hole (2003)

Ghez, A. M., Salim, S., Hornstein, S. D., Tanner, A., Lu, J. R., Morris, M., ...

We present new proper motion measurements and simultaneous orbital solutions for three newly identified (S0-16, S0-19, and S0-20) and four previously known (S0-1, S0-2, S0-4, and S0-5) stars at the...

Adsorption of beta-hairpin peptides on the surface of water: a neutron reflection study (2003)

Lu, J R, Perumal, S, Powers, E, Kelly, J, Webster, J R P, Penfold, J

Interfacial structure of phosphorylcholine incorporated biocompatible polymer films (2003)

Tang, Y, Su, T J, Armstrong, J, Lu, J R, Lewis, A L, Vick, T A, ...

Reduced protein adsorption on the surface of a chemically grafted phospholipid monolayer (2001)

Lu, J R, Murphy, E F, Su, T J, Lewis, A L, Stratford, P W, Satija, S K

The interaction between SDS and lysozyme at the hydrophilic solid-water interface (2001)

Green, R J, Su, T J, Lu, J R, Penfold, J

Adsorption of ammonium perfluorooctanoate at the air-water interface (2001)

Lu, J R, Ottewill, R H, Rennie, A R

Conformal roughness in the adsorbed lamellar phase of aerosol-OT at the air/water and liquid/solid interface (2001)

Li, Z X, Lu, J R, Thomas, R K, Weller, A, Penfold, J, Webster, J R P, ...

The displacement of preadsorbed protein with a cationic surfactant at the hydrophilic SiO2-water interface (2001)

Green, R J, Su, T J, Lu, J R, Webster, J R P

Neutron reflection from a dimyristoylphosphatidylcholine monolayer adsorbed on a hydrophobised silicon support (2001)

Hollinshead, C M, Hanna, M, Barlow, D J, De Biasi, V, Bucknall, D G, Camilleri, P, ...

The monolayer structure of the branched nonyl phenol oxyethylene glycols at the air-water interface (2000)

Green, S R, Su, T J, Lu, J R, Penfold, J

Competetive adsorption of lysozyme and C12E5 at the A/L interface (2000)

Green, R J, Su, T J, Lu, J R, Webster, J R P, Penfold, J

The adsorption of pentaethylene glycol monododecyl ether at the solid poly(methyl methacrylate)-water interface: a spectroscopic ellipsometry study (2000)

Gilchrist, G A, Lu, J R, Keddie, J L, Staples, E, Garrett, P

Fouling of ceramic membranes by albumins under dynamic filtration conditions (2000)

Su, T J, Lu, J R, Cui, Z F, Thomas, R K

Characterisation of protein adsorption at the phosphorylcholine incorporated polymer-water interface (2000)

Murphy, E F, Lu, J R, Brewer, J, Russell, J

Adsorption of lysozyme onto the silicon oxide surface chemically grafted with a monolayer of pentadecyl-1-ol (2000)

Su, T J, Green, R J, Wang, Y, Murphy, E F, Lu, J R, Ivkov, R, ...

Adsorption of proteins from aqueous solutions on hydrophobic surfaces studied by neutron reflection (2000)

Fragneto, G, Su, T J, Lu, J R, Thomas, R K, Rennie, A R

pH-controlled adsorption of polyelectrolyte diblock copolymers at the solid/liquid interface (2000)

Styrkas, D A, Butun, V, Lu, J R, Keddie, J L, Armes, S P

Interaction of lysozyme and sodium dodecyl sulphate at the air-water interface (2000)

Green, R J, Su, T J, Joy, H, Lu, J R

Surfactant mixtures (review article) (2000)

Lu, J R, Penfold, J, Thomas, R K

Structure of surfactant monolayers at the air/water interface studied by neutron reflection (2000)

Lu, J R, Thomas, R K

in Industrial Uses of Neutrons, Ed B Gabrys

The structure and composition of mixed surfactant micelles of SDS/C12E6 and C12E6/C16TAB (1999)

Penfold, J, Staples, E, Thompson, L, Tucker, I, Hines, J, Thomas, R K, ...

Adsorption of pentaethylene glycol monododecyl ether at the flat polymer/water interface: studied by specular neutron reflection (1999)

Gilchrist, V A, Lu, J R, Staples, E, Garrett, P, Penfold, J

The reduced adsorption of proteins at the hydrophillic polymer water interface (1999)

Murphy, E F, Lu, J R, Brewer, J, Russell, J, Penfold, J

Adsorption of serum albumins at the air/water interface studied by neutron reflection (1999)

Lu, J R, Su, T J, Penfold, J

Identification of the location of protein fouling on ceramic membranes under dynamic filtration conditions (1999)

Su, T J, Lu, J R, Cui, Z F, Thomas, R K, Heenan, R K

Effect of pH on the adsorption of BSA at the silica/water interface, studied by neutron reflection (1999)

Su, T J, Lu, J R, Thomas, R K, Cui, Z F, Penfold, J

The structure and composition of ethyl hexadecanoate layers spread on aqueous solution of hexaethylene glycol monodecyl ether (1999)

Lu, J R, Su, T J, Lawrence, M J, Barlow, D J, Warisnoicharoen, W, Zuberi, T

The effect of solution pH on the structural conformation of lysozyme layers adsorbed on the surface of water (1999)

Lu, J R, Su, T J, Howlin, B

Structural conformation of bovine serum albumin layers at the air-water interface studied by neutron reflection (1999)

Lu, J R, Su, T J, Thomas, R K

Structure of self-assembled layers on silicon: Combined use of spectroscopic variable angle ellipsometry, neutron reflection and atomic force microscopy (1999)

Styrkas, D A, Keddie, J L, Lu, J R, Su, T J, Zhdan, P A

Neutron reflection study of globular protein adsorption at planar interfaces (1999)

Lu, J R

Neutron reflectivity studies of AOT monolayers adsorbed at the oil/water, air/water and hydrophobic solid/water interfaces (1998)

Li, ZX, Lu, J R, Fragneto, G, Thomas, R K, Penfold, J, Binks, BP, ...

The structure of monododecyl pentaethylene glycol monolayers with and without added dodecane at the air/solution interface: a neutron reflection study (1998)

Lu, J R, Li, ZX, Thomas, R K, Binks, BP, Fletcher, PDI, Penfold, J

The effect of solution pH on the structure of lysosyme layers adsorbed at the silica-water interface studied by neutron reflection (1998)

Su, T J, Lu, J R, Thomas, R K, Cui, Z F, Penfold, J

The adsorption of sodium dodecyl sulphate at the surface of aqueous solutions of poly(vinylpyrrol) studied by neutron reflection (1998)

Purcell, I P, Lu, J R, Thomas, R K, Howe, A M, Penfold, J

The interaction between poly(ethylene oxide) and monovalent dodecyl sulphates studied by neutron reflection (1998)

Cooke, D J, Blondel, J A K, Lu, J R, Thomas, R K, Wang, Y L, Han, B X, ...

The interaction between poly(ehtylene oxide) and sodium dodecyl sulphate studied by neutron reflection (1998)

Cooke, D J, Dong, C C, Lu, J R, Thomas, R K, Simister, E A, Penfold, J

Neutron reflection from wet interfaces (1998)

Lu, J R, Thomas, R K

The conformational structure of bovine serum albumin layers adsorbed at the silica-water interface (1998)

Su, T J, Lu, J R, Thomas, R K, Cui, Z F, Penfold, J

Mixing in cationic surfactant films studied by small-angle neutron scattering (1998)

Eastoe, J, Bumajdad, A, Heenan, R K, Lu, J R, Steytler, D C, Egelhaaf, S

Application of small angle neutron scattering to the in-situ study of protein fouling on ceramic membranes (1998)

Su, T J, Lu, J R, Cui, Z F, Thomas, R K, Heenan, R K

The adsorption of lysozyme at the silica/water interface: a neutron reflection study (1998)

Su, T J, Lu, J R, Thomas, R K, Cui, Z F, Penfold, J

Binding of sodium dodecyl sulphate to bovine serum albumin layers adsorbed at the silica/water interface (1998)

Lu, J R, Su, T J, Thomas, R K, Penfold, J

Structural conformation of lysozyme layers at the air/water interface studied by neutron reflection (1998)

Lu, J R, Su, T J, Thomas, R K, Penfold, J, Webster, J R P

Binding of surfactants onto pre-adsorbed layers of bovine serum albumin at the silica-water interface (1998)

Lu, J R, Su, T J, Thomas, J

Neutron and x-ray reflection from proteins at interfaces (1998)

Lu, J R, Thomas, R K

in Physical Chemistry of Biological Interfaces, Ed Baskin (in press 1998)

Neutron reflection from counterions at the surface of a soluble surfactant solution (1997)

Su, T J, Lu, J R, Thomas, R K, Penfold, J

Neutron reflectivity studies of the adsorption of aerosol-OT at the air-water interface: the surface excess (1997)

Li, Z X, Lu, J R, Thomas, R K

Neutron reflectivity studies of the adsorption of aerosol-OT at the air-water interface: structure of the sodium salt (1997)

Li, Z X, Lu, J R, Thomas, R K, Penfold, J

Microemulsions with didodecyldimethylammonium bromide studied by neutron contrast variation (1997)

Eastoe, J, Hetherington, K J, Dalton, J S, Sharpe, D, Lu, J R, Heenan, R K

The structure of monolayers of monododecyl dodeca-ethylene glycol at the air/water interface studied by neutron reflection (1997)

Lu, J R, Su, T J, Li, Z X, Thomas, R K, Staples, E, Tucker, I, ...

The determination of segment density distribution profiles of polyethylene oxide layers adsorbed at the air-water interface (1996)

Lu, J R, Su, T J, Thomas, R K, Penfold, J, Richards, R W

The influence of sorbitol on the adsorption of surfactants at the air-liquid interface (1996)

Staples, E, Thompson, L, Tucker, I, Penfold, J, Thomas, R K, Lu, J R

The adsorption of mixed nonionic/cationic surfactants at the air-water interface (1996)

Penfold, J, Staples, E, Cummins, P, Tucker, I, Thomas, R K, Simister, E A, ...

Neutron specular and off-specular reflection from the surface of aerosol-OT solutions above the critical micelle concentration (1996)

Li, Z X, Lu, J R, Thomas, R K, Penfold, J

Neutron reflection study of the surface of butanol/water and hexanol/water mixtures (1996)

Li, Z X, Lu, J R, Thomas, R K, Rennie, A R, Penfold, J

Apparent anomalies in surface excesses determined from neutron reflectivity and the Gibbs equation in anionic surfactants with particular reference to perfluorooctanoates at the air/water interface (1996)

An, SW, Lu, J R, Thomas, R K, Penfold, J

The structure of hydrocarbon chain surfactant monolayers at the air/water interface: neutron reflection from dodecyl trimethylammonium bromide (1996)

Lu, J R, Li, Z X, Thomas, R K, Penfold, J

The effect of temperature on the adsorption of nonionic surfactants and non-ionic surfactant mixtures atthe air-water interface (1996)

Penfold, J, Staples, E, Thompson, L, Tucker, I, Thomas, R K, Lu, J R

The structure of the mixed cationic/non-ionic surfactant monolayer of hexadecyltrimethyl ammonium bromide and monododecyl hexaethylene glycol at the air-water interface (1996)

Penfold, J, Staples, E J, Cummins, P, Tucker, I, Thomas, R K,